Company lists · Data refreshed October 2026
Top 24 Commercial building systems contractors based in London, United Kingdom
RevenueBase identified 115 company matches for commercial building systems contractors associated with London, United Kingdom as of October 2026 and tracks 1,414 professional contacts across them, including 567 with verified work emails. Across the United Kingdom, London is the largest hub for this category.
This list covers company matches for commercial building systems contractors associated with London, United Kingdom, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed October 10, 2026.
Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.
The 24 largest commercial building systems contractors based in London, United Kingdom
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 260 contacts → | ||||
Exact match “Gratte Brothers Group is a leading independent provider of comprehensive building services, renowned for exceptional quality.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase | |||||
| 2 | 87 contacts → | ||||
Exact match “Grant Walker Engineering specialise in the complete installation of Electrical and Mechanical systems across all work sectors including quality office developments, commercial and…” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase | |||||
| 3 | 72 contacts → | ||||
Exact match “3MSe Ltd are an experienced provider of turnkey Building Management Systems.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase | |||||
| 4 | 44 contacts → | ||||
Exact match “SMC are a leading custom electronic system design, installation and aftercare company.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase | |||||
| 5 | 44 contacts → | ||||
Exact match “Malcolm Building Services are a London based Mechanical and Electrical contractor specialising in Commercial & residential new build mixed use schemes.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase | |||||
| 6 | 41 contacts → | ||||
Exact match “About Us: Established in 2023, Redworx MEP Limited is a dynamic Mechanical and Electrical contractor aiming to make a significant impact in the London market.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase | |||||
| 7 | 39 contacts → | ||||
Exact match “We are systems integrators.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase | |||||
| 8 | 38 contacts → | ||||
Exact match “Master Systems Integrator OKTO Technologies is a leader in the design, development & installation of Smart Building Technology for- SuperPrime Residential - Luxury Hospitality -…” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase | |||||
| 9 | 38 contacts → | ||||
Exact match “The core activities of our business are all aspects of mechanical and electrical services including air conditioning, sprinkler systems, CHW<HW, ventilation, BMS, door entry and…” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase | |||||
| 10 | 37 contacts → | ||||
Exact match “Here at ECS Systems we pride ourselves on providing the highest level of personalised service, to every client.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase | |||||
| 11 | 27 contacts → | ||||
Exact match “Established in 2014, Leonari is a Mechanical & Electrical contractor working in London and the South East.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase | |||||
| 12 | 26 contacts → | ||||
Exact match “All BMS Systems offer a comprehensive service covering consultancy, design, project management, engineering, installation and all essential support services.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase | |||||
| 13 | 24 contacts → | ||||
Exact match “QQ design, supply and install of residental and commercial automation technology and energy-efficient control systems.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase | |||||
| 14 | 15 contacts → | ||||
Exact match “At GPM London, we specialise in delivering hassle-free, professional MEP solutions tailored to your needs, no matter the size or complexity of the job.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase | |||||
| 15 | 12 contacts → | ||||
Exact match “Mara has spent over 30 years listening to and collaborating with our customers to define and refine the range of products and services that are essential to making buildings…” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase | |||||
| 16 | 10 contacts → | ||||
Exact match “Automatry combines building controls engineering with software development for the built environment.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase | |||||
| 17 | 10 contacts → | ||||
Exact match “TECHNOLOGY - DESIGN - SENSONIC Building automation with Cognitive AI In the cutting-edge space Sensonic Design is a High-tech company engaged in the revolutionary integration of…” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase | |||||
| 18 | 10 contacts → | ||||
Exact match “London-based security company specialising in the design, installation, service and maintenance of single domestic, multi-occupancy residential and commercial security systems.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase | |||||
| 19 | 10 contacts → | ||||
Exact match “Advanced Integration (AI) is a smart home automation and building management systems (BMS) specialist with more than 30 years of experience in the industry.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase | |||||
| 20 | 9 contacts → | ||||
Exact match “We are an award-winning, SafeContractor approved company specialised in SMART automation technologies and entertainment systems for the residential and commercial sectors.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase | |||||
| 21 | 9 contacts → | ||||
Exact match “JSJ Smart Homes was formed as a specialised contractor in the field of domestic installations, covering all aspects of electrical installs, such as home automation and data…” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase | |||||
| 22 | 9 contacts → | ||||
Exact match “IBOS optimises building systems, transforming them into intelligent, highly efficient operations.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase | |||||
| 23 | 8 contacts → | ||||
Exact match “With over 50 years’ experience within the industry Racsel Building Services Limited specialize in Design, Installation, Maintenance and Servicing of heating, ventilation, cooling…” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase | |||||
| 24 | 8 contacts → | ||||
Exact match Recorded description not available. Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase | |||||
RevenueBase SmartSearch
Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.
This list uses Exact for “commercial building systems contractors”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.
Showing 24 of 115 commercial building systems contractors based in London, United Kingdom
See the full list, filter by size, metro and specialty, and access 567 tracked professional contacts with verified work emails. Direct dials are available where recorded.
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Commercial building systems contractors based in London, United Kingdom at a glance
As of Oct 10, 2026Companies by employee count
Email recency for this list is measured across the whole United Kingdom list rather than for London, so it is reported there. Company counts and contact totals on this page are exact for London, over 115 companies.
How this list was built
The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.
- Source
- The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
- What qualifies
- Company records associated with London, United Kingdom whose business descriptions match “commercial building systems contractors” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
- RevenueBase SmartSearch
- Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
- Public preview
- The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
- Match quality
- RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
- Ranking
- Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
- Verification
- Every displayed company carries at least one verified work email. RevenueBase tracks 567 professional contacts with verified work emails across the full matched dataset. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
- Refresh
- This page's figures were pulled from the company graph on October 10, 2026. Lists refresh periodically as the graph is re-checked.
- Record context
- Company records and descriptions can change. Check the company's website for its current services and locations.
Frequently asked
What is RevenueBase SmartSearch?
RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “commercial building systems contractors”; each Exact match badge shows search membership, not an individual similarity or quality score.
How many commercial building systems contractors are there based in London, United Kingdom?
RevenueBase identified 115 company matches for commercial building systems contractors associated with London, United Kingdom as of October 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.
What is the largest company on this list?
Gratte Brothers Group tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.
Which city in the United Kingdom has the most commercial building systems contractors?
London leads the United Kingdom with 115 company records, followed by Manchester (15) and Bristol (12).
How do I get contact information for these companies?
A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 567 professional contacts with verified work emails tracked across these 115 companies; direct dials are available where recorded.
How current is this list?
The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on October 10, 2026.
Ready to reach these companies? Verified emails and direct dials for all 115 commercial building systems contractors based in London, United Kingdom. Start with a free account, no credit card.
Download this list →Related lists
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About this data
RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase SmartSearch, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.
More company lists
- All company lists
- Lists by location
- Lists A-Z
- New lists
- Commercial building systems contractors based in Sydney, Australia
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Company intelligence · public preview
Top 24 commercial building systems contractors based in London, United Kingdom
Find companies in any niche.
Describe the businesses you want in your own words. RevenueBase SmartSearch matches company descriptions by meaning.
RevenueBase records 115 matching company records for commercial building systems contractors based in London, United Kingdom, with 1,414 tracked contacts and 567 verified work emails.
This public preview shows 24 selected records ordered by tracked contacts. RevenueBase SmartSearch finds company descriptions that match by meaning at Exact. Snapshot: October 10, 2026.
RevenueBase compiles business descriptions for niche-company discovery; each row shows a recorded excerpt where available. Adapt this search to find the companies and contacts you want.
Top 24 commercial building systems contractors based in London, United Kingdom
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
| # | Company | Headquarters on record | Reported employees | RevenueBase SmartSearch | Tracked contacts |
|---|---|---|---|---|---|
| 1 |  Gratte Brothers Groupgratte.comHQ: London, United KingdomReported employees: 501-1,000 | London, United Kingdom | 501-1,000 | Exact match | 260 contacts → |
“Gratte Brothers Group is a leading independent provider of comprehensive building services, renowned for exceptional quality.” Recorded description excerpt · October 10, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 | Grant Walker Engineeringg-w-e.com HQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 87 contacts → |
“Grant Walker Engineering specialise in the complete installation of Electrical and Mechanical systems across all work sectors including quality office developments, commercial and…” Recorded description excerpt · October 10, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 |  3mse LTD3mse.co.ukHQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 72 contacts → |
“3MSe Ltd are an experienced provider of turnkey Building Management Systems.” Recorded description excerpt · October 10, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 |  SMC Smart Homessmc-uk.comHQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 44 contacts → |
“SMC are a leading custom electronic system design, installation and aftercare company.” Recorded description excerpt · October 10, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 | Malcolm Building Services Limitedmalcolmbuildingservices.co.uk HQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 44 contacts → |
“Malcolm Building Services are a London based Mechanical and Electrical contractor specialising in Commercial & residential new build mixed use schemes.” Recorded description excerpt · October 10, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 | Redworx MEPredworx.uk HQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 41 contacts → |
“About Us: Established in 2023, Redworx MEP Limited is a dynamic Mechanical and Electrical contractor aiming to make a significant impact in the London market.” Recorded description excerpt · October 10, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 |  Link Media Systemslinkmediasystems.comHQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 39 contacts → |
“We are systems integrators.” Recorded description excerpt · October 10, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 |  Okto Technologiesoktotechnologies.co.ukHQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 38 contacts → |
“Master Systems Integrator OKTO Technologies is a leader in the design, development & installation of Smart Building Technology for- SuperPrime Residential - Luxury Hospitality -…” Recorded description excerpt · October 10, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 |  Elmech LTDelmechltd.co.ukHQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 38 contacts → |
“The core activities of our business are all aspects of mechanical and electrical services including air conditioning, sprinkler systems, CHW<HW, ventilation, BMS, door entry and…” Recorded description excerpt · October 10, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 |  ECS Systems LTDecssystems.co.ukHQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 37 contacts → |
“Here at ECS Systems we pride ourselves on providing the highest level of personalised service, to every client.” Recorded description excerpt · October 10, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 | Leonari LTDleonari.co.uk HQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 27 contacts → |
“Established in 2014, Leonari is a Mechanical & Electrical contractor working in London and the South East.” Recorded description excerpt · October 10, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 |  ALL BMS Systems LTDallbms.co.ukHQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 26 contacts → |
“All BMS Systems offer a comprehensive service covering consultancy, design, project management, engineering, installation and all essential support services.” Recorded description excerpt · October 10, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 |  QQ Solutions LTDqqbts.comHQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 24 contacts → |
“QQ design, supply and install of residental and commercial automation technology and energy-efficient control systems.” Recorded description excerpt · October 10, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 |  GPM London LTDgpmlondon.comHQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 15 contacts → |
“At GPM London, we specialise in delivering hassle-free, professional MEP solutions tailored to your needs, no matter the size or complexity of the job.” Recorded description excerpt · October 10, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 |  Mara Facility Servicesmara.co.ukHQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 12 contacts → |
“Mara has spent over 30 years listening to and collaborating with our customers to define and refine the range of products and services that are essential to making buildings…” Recorded description excerpt · October 10, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 |  Automatryautomatry.comHQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 10 contacts → |
“Automatry combines building controls engineering with software development for the built environment.” Recorded description excerpt · October 10, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 |  Sensonic Designsensonicdesign.comHQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 10 contacts → |
“TECHNOLOGY - DESIGN - SENSONIC Building automation with Cognitive AI In the cutting-edge space Sensonic Design is a High-tech company engaged in the revolutionary integration of…” Recorded description excerpt · October 10, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 |  LDN Security Solutions Limitedldnsecuritysolutions.co.ukHQ: London, United KingdomReported employees: 1-10 | London, United Kingdom | 1-10 | Exact match | 10 contacts → |
“London-based security company specialising in the design, installation, service and maintenance of single domestic, multi-occupancy residential and commercial security systems.” Recorded description excerpt · October 10, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 |  Advanced Integration LTDadvancedintegration.ukHQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 10 contacts → |
“Advanced Integration (AI) is a smart home automation and building management systems (BMS) specialist with more than 30 years of experience in the industry.” Recorded description excerpt · October 10, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 |  Intellicasaintellicasa.comHQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 9 contacts → |
“We are an award-winning, SafeContractor approved company specialised in SMART automation technologies and entertainment systems for the residential and commercial sectors.” Recorded description excerpt · October 10, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 | JSJ Smart Homesjsjelec.com HQ: London, United KingdomReported employees: 1-10 | London, United Kingdom | 1-10 | Exact match | 9 contacts → |
“JSJ Smart Homes was formed as a specialised contractor in the field of domestic installations, covering all aspects of electrical installs, such as home automation and data…” Recorded description excerpt · October 10, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 |  IBOSibos.co.ukHQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 9 contacts → |
“IBOS optimises building systems, transforming them into intelligent, highly efficient operations.” Recorded description excerpt · October 10, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 | Racsel Building Services LTDracsel.co.uk HQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 8 contacts → |
“With over 50 years’ experience within the industry Racsel Building Services Limited specialize in Design, Installation, Maintenance and Servicing of heating, ventilation, cooling…” Recorded description excerpt · October 10, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 | 21st Century Contracts Limited21stcenturycontracts.co.uk HQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 8 contacts → |
No recorded description excerpt is available for this public record. | |||||
Showing 24 of 115 company matches
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Commercial building systems contractors: dataset insights
October 10, 2026These summaries describe recorded coverage in this saved dataset. This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Reported company sizes
114 records in the displayed employee bands.
1 matching records are outside the displayed bands or do not have a displayed size. Bars show shares of the displayed bands.
Email recency for this list is measured across the whole United Kingdom list rather than for London, so it is reported there. Company counts and contact totals on this page are exact for London, over 115 companies.
How this company list was built
Describe a niche in your own words: companies installing commercial solar, or manufacturers of sustainable packaging. RevenueBase SmartSearch finds companies whose compiled business descriptions match by meaning. This list is one saved example to adapt.
Where the company descriptions come from
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
RevenueBase SmartSearch matching settings
- Exact
- Closest fits to the business described.
- Similar
- Similar businesses with a wider range of fits.
- Related
- Related businesses in and around the category.
- Broad
- A broader set of businesses connected to the description.
RevenueBase SmartSearch · Exact match identifies inclusion in this search's closest semantic matching setting. It is not a per-company confidence score, a literal keyword match, or a quality endorsement.
Selection, ordering and scope
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Recorded company descriptions support research; check company websites for current services. The selected preview is ordered by tracked contacts and is not a list of the best service providers.
Snapshot: October 10, 2026.
RevenueBase is a B2B data infrastructure company. Its September 3, 2026 published methodology describes a graph of 60 million companies and 398.9 million professional contacts; these platform figures differ from this page's totals. Published methodology ↗
Questions about this company list
What does Exact match mean for commercial building systems contractors?
The separate RevenueBase SmartSearch column identifies inclusion at the closest semantic matching preset. It is not a literal keyword match, a per-company confidence score or a quality endorsement. Changing the search form opens a new search in RevenueBase; it does not reclassify these saved rows.
How many commercial building systems contractors did RevenueBase find based in London, United Kingdom?
The saved snapshot records 115 matching company records, 1,414 tracked contacts and 567 verified emails. The public preview displays 24 selected records.
Where do the company descriptions come from?
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
How are the public companies ordered?
The selected public records are ordered by contacts tracked in RevenueBase, highest first. Contact coverage is a prospecting measure, not an assessment of the company's services or quality.
How can I get contact information?
Select a company's contact count to open its filtered contacts in RevenueBase. Free signup is required and includes 500 credits and limited free results. Verified emails, direct dials and mobile numbers depend on available coverage.
How current is this list?
Snapshot: October 10, 2026. Review each company's website for current services and locations. A recorded business description does not establish that every company offers every service named in the search.
What do headquarters and employee bands mean?
These are recorded company-level fields, rather than a map of every branch or a count of specialists. Missing headquarters or employee bands are labeled; older records may show a location separately from recorded headquarters.
Build your next target company list
Adapt this niche search and work with available contacts in RevenueBase.
Related lists
Commercial building systems contractors by geography
- Commercial building systems contractors based in Sydney, Australia
- Commercial building systems contractors based in Belo Horizonte, Brazil
- Commercial building systems contractors based in Sao Paulo, Brazil
- Commercial building systems contractors based in Calgary, Canada
- Commercial building systems contractors based in Edmonton, Canada
- Commercial building systems contractors based in Mississauga, Canada
- Commercial building systems contractors based in Toronto, Canada
- Commercial building systems contractors based in Ahmedabad, India
- Commercial building systems contractors based in Bangalore, India
- Commercial building systems contractors based in Chennai, India
- Commercial building systems contractors based in Hyderabad, India
- Commercial building systems contractors based in Mumbai, India
Cite this list
RevenueBase Data Team. Top 24 commercial building systems contractors based in London, United Kingdom. Snapshot: October 10, 2026. https://revenuebase.ai/companies/commercial-building-systems-contractors/united-kingdom/london.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗
More company lists
- All company lists
- Lists by location
- Lists A-Z
- New lists
- Commercial building systems contractors based in Sydney, Australia
- Commercial building systems contractors based in Belo Horizonte, Brazil
- Commercial building systems contractors based in Sao Paulo, Brazil
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- Commercial building systems contractors based in Edmonton, Canada
- Commercial building systems contractors based in Mississauga, Canada
Company intelligence · public preview
Top 24 commercial building systems contractors based in London, United Kingdom
RevenueBase records 115 matching company records for commercial building systems contractors based in London, United Kingdom, with 1,414 tracked contacts and 567 verified work emails.
This public preview shows 24 selected records ordered by tracked contacts. RevenueBase SmartSearch finds company descriptions that match by meaning at Exact. Snapshot: October 10, 2026.
RevenueBase compiles business descriptions for niche-company discovery; each row shows a recorded excerpt where available. Adapt this search to find the companies and contacts you want.
Top 24 commercial building systems contractors based in London, United Kingdom
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
| # | Company | Headquarters on record | Reported employees | RevenueBase SmartSearch | Tracked contacts |
|---|---|---|---|---|---|
| 1 | Gratte Brothers Groupgratte.com HQ: London, United KingdomReported employees: 501-1,000 | London, United Kingdom | 501-1,000 | Exact match | 260 contacts → |
“Gratte Brothers Group is a leading independent provider of comprehensive building services, renowned for exceptional quality.” Recorded description excerpt · October 10, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 | Grant Walker Engineeringg-w-e.com HQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 87 contacts → |
“Grant Walker Engineering specialise in the complete installation of Electrical and Mechanical systems across all work sectors including quality office developments, commercial and…” Recorded description excerpt · October 10, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 | 3mse LTD3mse.co.uk HQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 72 contacts → |
“3MSe Ltd are an experienced provider of turnkey Building Management Systems.” Recorded description excerpt · October 10, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 | SMC Smart Homessmc-uk.com HQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 44 contacts → |
“SMC are a leading custom electronic system design, installation and aftercare company.” Recorded description excerpt · October 10, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 | Malcolm Building Services Limitedmalcolmbuildingservices.co.uk HQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 44 contacts → |
“Malcolm Building Services are a London based Mechanical and Electrical contractor specialising in Commercial & residential new build mixed use schemes.” Recorded description excerpt · October 10, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 | Redworx MEPredworx.uk HQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 41 contacts → |
“About Us: Established in 2023, Redworx MEP Limited is a dynamic Mechanical and Electrical contractor aiming to make a significant impact in the London market.” Recorded description excerpt · October 10, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 | Link Media Systemslinkmediasystems.com HQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 39 contacts → |
“We are systems integrators.” Recorded description excerpt · October 10, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 | Okto Technologiesoktotechnologies.co.uk HQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 38 contacts → |
“Master Systems Integrator OKTO Technologies is a leader in the design, development & installation of Smart Building Technology for- SuperPrime Residential - Luxury Hospitality -…” Recorded description excerpt · October 10, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 | Elmech LTDelmechltd.co.uk HQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 38 contacts → |
“The core activities of our business are all aspects of mechanical and electrical services including air conditioning, sprinkler systems, CHW<HW, ventilation, BMS, door entry and…” Recorded description excerpt · October 10, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 | ECS Systems LTDecssystems.co.uk HQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 37 contacts → |
“Here at ECS Systems we pride ourselves on providing the highest level of personalised service, to every client.” Recorded description excerpt · October 10, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 | Leonari LTDleonari.co.uk HQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 27 contacts → |
“Established in 2014, Leonari is a Mechanical & Electrical contractor working in London and the South East.” Recorded description excerpt · October 10, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 | ALL BMS Systems LTDallbms.co.uk HQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 26 contacts → |
“All BMS Systems offer a comprehensive service covering consultancy, design, project management, engineering, installation and all essential support services.” Recorded description excerpt · October 10, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 | QQ Solutions LTDqqbts.com HQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 24 contacts → |
“QQ design, supply and install of residental and commercial automation technology and energy-efficient control systems.” Recorded description excerpt · October 10, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 | GPM London LTDgpmlondon.com HQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 15 contacts → |
“At GPM London, we specialise in delivering hassle-free, professional MEP solutions tailored to your needs, no matter the size or complexity of the job.” Recorded description excerpt · October 10, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 | Mara Facility Servicesmara.co.uk HQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 12 contacts → |
“Mara has spent over 30 years listening to and collaborating with our customers to define and refine the range of products and services that are essential to making buildings…” Recorded description excerpt · October 10, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 | Automatryautomatry.com HQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 10 contacts → |
“Automatry combines building controls engineering with software development for the built environment.” Recorded description excerpt · October 10, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 | Sensonic Designsensonicdesign.com HQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 10 contacts → |
“TECHNOLOGY - DESIGN - SENSONIC Building automation with Cognitive AI In the cutting-edge space Sensonic Design is a High-tech company engaged in the revolutionary integration of…” Recorded description excerpt · October 10, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 | LDN Security Solutions Limitedldnsecuritysolutions.co.uk HQ: London, United KingdomReported employees: 1-10 | London, United Kingdom | 1-10 | Exact match | 10 contacts → |
“London-based security company specialising in the design, installation, service and maintenance of single domestic, multi-occupancy residential and commercial security systems.” Recorded description excerpt · October 10, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 | Advanced Integration LTDadvancedintegration.uk HQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 10 contacts → |
“Advanced Integration (AI) is a smart home automation and building management systems (BMS) specialist with more than 30 years of experience in the industry.” Recorded description excerpt · October 10, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 | Intellicasaintellicasa.com HQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 9 contacts → |
“We are an award-winning, SafeContractor approved company specialised in SMART automation technologies and entertainment systems for the residential and commercial sectors.” Recorded description excerpt · October 10, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 | JSJ Smart Homesjsjelec.com HQ: London, United KingdomReported employees: 1-10 | London, United Kingdom | 1-10 | Exact match | 9 contacts → |
“JSJ Smart Homes was formed as a specialised contractor in the field of domestic installations, covering all aspects of electrical installs, such as home automation and data…” Recorded description excerpt · October 10, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 | IBOSibos.co.uk HQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 9 contacts → |
“IBOS optimises building systems, transforming them into intelligent, highly efficient operations.” Recorded description excerpt · October 10, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 | Racsel Building Services LTDracsel.co.uk HQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 8 contacts → |
“With over 50 years’ experience within the industry Racsel Building Services Limited specialize in Design, Installation, Maintenance and Servicing of heating, ventilation, cooling…” Recorded description excerpt · October 10, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 | 21st Century Contracts Limited21stcenturycontracts.co.uk HQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 8 contacts → |
No recorded description excerpt is available for this public record. | |||||
Showing 24 of 115 company matches
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Commercial building systems contractors: dataset insights
October 10, 2026These summaries describe recorded coverage in this saved dataset. This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Reported company sizes
114 records in the displayed employee bands.
1 matching records are outside the displayed bands or do not have a displayed size. Bars show shares of the displayed bands.
Email recency for this list is measured across the whole United Kingdom list rather than for London, so it is reported there. Company counts and contact totals on this page are exact for London, over 115 companies.
How this company list was built
Describe a niche in your own words: companies installing commercial solar, or manufacturers of sustainable packaging. RevenueBase SmartSearch finds companies whose compiled business descriptions match by meaning. This list is one saved example to adapt.
Where the company descriptions come from
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
RevenueBase SmartSearch matching settings
- Exact
- Closest fits to the business described.
- Similar
- Similar businesses with a wider range of fits.
- Related
- Related businesses in and around the category.
- Broad
- A broader set of businesses connected to the description.
RevenueBase SmartSearch · Exact match identifies inclusion in this search's closest semantic matching setting. It is not a per-company confidence score, a literal keyword match, or a quality endorsement.
Selection, ordering and scope
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Recorded company descriptions support research; check company websites for current services. The selected preview is ordered by tracked contacts and is not a list of the best service providers.
Snapshot: October 10, 2026.
RevenueBase is a B2B data infrastructure company. Its September 3, 2026 published methodology describes a graph of 60 million companies and 398.9 million professional contacts; these platform figures differ from this page's totals. Published methodology ↗
Questions about this company list
What does Exact match mean for commercial building systems contractors?
The separate RevenueBase SmartSearch column identifies inclusion at the closest semantic matching preset. It is not a literal keyword match, a per-company confidence score or a quality endorsement. Changing the search form opens a new search in RevenueBase; it does not reclassify these saved rows.
How many commercial building systems contractors did RevenueBase find based in London, United Kingdom?
The saved snapshot records 115 matching company records, 1,414 tracked contacts and 567 verified emails. The public preview displays 24 selected records.
Where do the company descriptions come from?
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
How are the public companies ordered?
The selected public records are ordered by contacts tracked in RevenueBase, highest first. Contact coverage is a prospecting measure, not an assessment of the company's services or quality.
How can I get contact information?
Select a company's contact count to open its filtered contacts in RevenueBase. Free signup is required and includes 500 credits and limited free results. Verified emails, direct dials and mobile numbers depend on available coverage.
How current is this list?
Snapshot: October 10, 2026. Review each company's website for current services and locations. A recorded business description does not establish that every company offers every service named in the search.
What do headquarters and employee bands mean?
These are recorded company-level fields, rather than a map of every branch or a count of specialists. Missing headquarters or employee bands are labeled; older records may show a location separately from recorded headquarters.
Build your next target company list
Adapt this niche search and work with available contacts in RevenueBase.
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Cite this list
RevenueBase Data Team. Top 24 commercial building systems contractors based in London, United Kingdom. Snapshot: October 10, 2026. https://revenuebase.ai/companies/commercial-building-systems-contractors/united-kingdom/london.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗
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