Company lists · Data refreshed October 2026

Top 25 Commercial building energy system contractors based in London, United Kingdom

Name: Commercial building energy system contractors based in London, United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Oct 10, 2026 127 companies tracked

RevenueBase identified 127 company matches for commercial building energy system contractors associated with London, United Kingdom as of October 2026 and tracks 2,179 professional contacts across them, including 1,202 with verified work emails. Across the United Kingdom, London is the largest hub for this category.

This list covers company matches for commercial building energy system 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.

How to read this list RevenueBase SmartSearch · Exact Recorded Oct 10, 2026 How this list was built

127Companies

2,179Contacts tracked

1,202Verified emails

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The 25 largest commercial building energy system contractors based in London, United Kingdom

Ranked by team size

Top 25 of 127 company matches for commercial building energy system contractors based in London, United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Oct 10, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	Dalkia UK	Exact match	London, United KingdomHQ recorded Oct 10, 2026	5,001-10,000	1,110 contacts →
	Exact match “Together, we’re delivering technical solutions for a better society and an Electric Britain Dalkia is one of the UK’s leading technical and energy services providers at the…” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
2	Vertex	Exact match	London, United KingdomHQ recorded Oct 10, 2026	51-200	133 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
3	AMD Group	Exact match	London, United KingdomHQ recorded Oct 10, 2026	11-50	87 contacts →
	Exact match “AMD Environmental are a collaborative Mechanical and Electrical Design and Build Engineering specialist with a sustainable approach in delivering challenging and bespoke projects…” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
4	Purdy Part Of Sureserve	Exact match	London, United KingdomHQ recorded Oct 10, 2026	201-500	78 contacts →
	Exact match “Who are we?” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
5	3mse LTD	Exact match	London, United KingdomHQ recorded Oct 10, 2026	51-200	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
6	GEM Environmental Building Services LTD	Exact match	London, United KingdomHQ recorded Oct 10, 2026	51-200	58 contacts →
	Exact match “GEM Environmental Building Services LTD was founded 20 years ago originally based in East London.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
7	Phoenix ME	Exact match	London, United KingdomHQ recorded Oct 10, 2026	501-1,000	47 contacts →
	Exact match “We stand as a well-established industry leader, specialising in the design, installation, and commissioning of mechanical and electrical systems across diverse sectors.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
8	ECS Systems LTD	Exact match	London, United KingdomHQ recorded Oct 10, 2026	11-50	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
9	Hanover Building Services	Exact match	London, United KingdomHQ recorded Oct 10, 2026	51-200	34 contacts →
	Exact match “Hanover is an award-winning building services provider that specialises in electrical, mechanical, plumbing, heating and renewable energy installations.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
10	ALL BMS Systems LTD	Exact match	London, United KingdomHQ recorded Oct 10, 2026	51-200	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
11	ONE MEP	Exact match	London, United KingdomHQ recorded Oct 10, 2026	11-50	25 contacts →
	Exact match “At ONE MEP, we deliver professional, reliable, and high-quality MEP solutions across London and surrounding areas.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
12	QQ Solutions LTD	Exact match	London, United KingdomHQ recorded Oct 10, 2026	11-50	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
13	Greenlight	Exact match	London, United KingdomHQ recorded Oct 10, 2026	11-50	23 contacts →
	Exact match “GreenLight is a UK based engineering group established in 2008 that specializes in commercial fit-out, facility management, and renewable energy services with a core focus on…” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
14	Celsius Solutions LTD	Exact match	London, United KingdomHQ recorded Oct 10, 2026	11-50	11 contacts →
	Exact match “Celsius Solutions Ltd delivers projects throughout London, the South East and the UK with our unequalled Design and Build service for the HVAC sector.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
15	Automatry	Exact match	London, United KingdomHQ recorded Oct 10, 2026	11-50	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
16	BTP Consultants	Exact match	London, United KingdomHQ recorded Oct 10, 2026	11-50	10 contacts →
	Exact match “We design mechanical and electrical systems, advise on all aspects of energy, carbon reduction and building physics.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
17	Cilantro Facilities Management	Exact match	London, United KingdomHQ recorded Oct 10, 2026	51-200	10 contacts →
	Exact match “Cilantro Facilities Management ethos is to successfully and proactively manage mechanical, electrical services and energy centres across each of our blue chip clients’…” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
18	IBOS	Exact match	London, United KingdomHQ recorded Oct 10, 2026	11-50	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
19	MSTEP	Exact match	London, United KingdomHQ recorded Oct 10, 2026	1-10	8 contacts →
	Exact match “mstep is a building services / MEP design consultancy with a mission to help create comfortable, healthy, efficient environments in which we can breathe, live, work and thrive -…” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
20	Racsel Building Services LTD	Exact match	London, United KingdomHQ recorded Oct 10, 2026	11-50	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
21	RMH Group	Exact match	London, United KingdomHQ recorded Oct 10, 2026	1-10	7 contacts →
	Exact match “Working, first time, every time." RMH Group is a SMART Building technology consultancy providing turnkey solutions, from the design to the supply and implementation of…” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
22	P3r Engineers LTD	Exact match	London, United KingdomHQ recorded Oct 10, 2026	11-50	6 contacts →
	Exact match “P3r Engineers offer innovative design in building services and are energy and sustainability consultants.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
23	MSI Works	Exact match	London, United KingdomHQ recorded Oct 10, 2026	11-50	6 contacts →
	Exact match “Unlock the Full Potential of Your Building with MSI Works!” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
24	TH Electrical & Mechanical LTD	Exact match	London, United KingdomHQ recorded Oct 10, 2026	11-50	6 contacts →
	Exact match “TH ELECTRICAL & MECHANICAL LTD is a construction company based in London and operating throughout London and the South East, delivering the full range of mechanical, electrical &…” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
25	Thrive AI	Exact match	London, United KingdomHQ recorded Oct 10, 2026	1-10	5 contacts →
	Exact match “Thrive-AI provides an end to end solution that puts the end users, operators and asset owners in control of their building, carbon footprint and operating costs.” 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 energy system 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 25 of 127 commercial building energy system contractors based in London, United Kingdom

See the full list, filter by size, metro and specialty, and access 1,202 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Commercial building energy system contractors based in London, United Kingdom at a glance

As of Oct 10, 2026

55.2%Verified-email coverage

17.2Average contacts per company

11-50Median size (employees)

Oct 10, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

5,001-10,000

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 127 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 energy system 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 1,202 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.

Commercial building energy system contractors by metro in the United Kingdom

Commercial building energy system contractors in Bristol29

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 energy system contractors”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many commercial building energy system contractors are there based in London, United Kingdom?

RevenueBase identified 127 company matches for commercial building energy system 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?

Dalkia UK 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 energy system contractors?

London leads the United Kingdom with 127 company records, followed by Bristol (29) and Manchester (26).

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 1,202 professional contacts with verified work emails tracked across these 127 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.

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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.