Company lists · Data refreshed November 2026

Top 25 Sustainable building system integrators based in the United Kingdom

RevenueBase identified 1,650 company matches for sustainable building system integrators associated with the United Kingdom as of November 2026 and tracks 23,887 professional contacts across them, including 10,024 with verified work emails. London is the largest hub.

This list covers company matches for sustainable building system integrators associated with the 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 November 6, 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 Nov 6, 2026 How this list was built
1,650Companies
23,887Contacts tracked
10,024Verified emails
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The 25 largest sustainable building system integrators based in the United Kingdom

Ranked by team size
Top 25 of 1,650 company matches for sustainable building system integrators based in the United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Nov 6, 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.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchLondon, United KingdomHQ recorded Nov 6, 20265,001-10,0001,127 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 · Nov 6, 2026 · View company records in RevenueBase
2Exact matchDartford, United KingdomHQ recorded Nov 6, 20261,001-5,000650 contacts →

Exact match

“Part of the Laing O’Rourke Group, and founded on more than 200 years of experience, we are a leading construction and infrastructure technology services provider, supplying a…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
3Exact matchStirling, United KingdomHQ recorded Nov 6, 2026501-1,000629 contacts →

Exact match

“The FES Group is one of the largest independent technical services companies in the UK over 60 years of experience providing building services solutions to a wide range of…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
4Exact matchGlasgow, United KingdomHQ recorded Nov 6, 2026201-500405 contacts →

Exact match

“IES is an innovative company at the forefront of the development and application of powerful software simulation tools and consulting services for architects, engineers and others…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
5Exact matchNorthampton, United KingdomHQ recorded Nov 6, 2026501-1,000352 contacts →

Exact match

“The Briggs & Forrester Group is an award winning building services specialist and is one of the industry’s largest independent contractors with an annual turnover in excess of…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
6Exact matchBristol, United KingdomHQ recorded Nov 6, 2026201-500325 contacts →

Exact match

“Space Engineering Services is the UK’s leading provider of refrigeration, heating, ventilation and air conditioning services.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
7Exact matchPetersfield, United KingdomHQ recorded Nov 6, 20261,001-5,000307 contacts →

Exact match

“Since 1931 we have been harnessing the natural elements to provide healthy, comfortable and safe working and living conditions in buildings.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
8Exact matchLondon, United KingdomHQ recorded Nov 6, 2026501-1,000268 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 · Nov 6, 2026 · View company records in RevenueBase
9Exact matchMaidenhead, United KingdomHQ recorded Nov 6, 2026201-500236 contacts →

Exact match

“BMSI is the UK’s largest & leading Independent systems integrator of Building Energy Management Systems (BEMS).”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
10Exact matchLondon, United KingdomHQ recorded Nov 6, 2026201-500224 contacts →

Exact match

“Max Fordham LLP is a partnership of engineers, designers and consultants, working with the built environment, to deliver a sustainable future and a thriving planet.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
11Exact matchHarlow, United KingdomHQ recorded Nov 6, 2026201-500223 contacts →

Exact match

“Part of the SCCI Group, SCCI Alphatrack designs, installs, and maintains connected building systems across social housing, commercial property, new builds, and public sector…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
12Exact matchManchester, United KingdomHQ recorded Nov 6, 2026201-500204 contacts →

Exact match

“learnd was founded in 2020 to disrupt the way buildings operate by providing energy and cost savings at scale - we call this the Power of Many.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
13Exact matchBirmingham, United KingdomHQ recorded Nov 6, 2026201-500191 contacts →

Exact match

“Carter Synergy is a nation-wide provider of refrigeration, mechanical, electrical and other core building services.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
14Exact matchBallymena, United KingdomHQ recorded Nov 6, 2026201-500177 contacts →

Exact match

“With 45+ years in business, Dowds expertise spans the full lifecycle of complex build environments – from initial design and systems integration to final handover and beyond.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
15Exact matchLeeds, United KingdomHQ recorded Nov 6, 20261,001-5,000155 contacts →

Exact match

“At Genuit Group, we’re driven by a clear purpose: to create a more sustainable built environment and a more resilient future for people and the planet.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
16Exact matchAshby-de-la-zouch, United KingdomHQ recorded Nov 6, 2026501-1,000154 contacts →

Exact match

“Swegon is a market leading supplier of energy efficient indoor climate, cooling and life safety systems.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
17Exact matchBristol, United KingdomHQ recorded Nov 6, 202651-200152 contacts →

Exact match

“MCS Ltd are specialist building services engineers covering all aspects of commercial and industrial building services and infrastructure engineering across varying market sectors.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
18Exact matchCheam, United KingdomHQ recorded Nov 6, 2026201-500144 contacts →

Exact match

“Smith & Byford is a family-owned and operated building services company.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
19Exact matchNottingham, United KingdomHQ recorded Nov 6, 2026201-500139 contacts →

Exact match

“J Tomlinson is a company built on strong foundations, with a substantial heritage and a wealth of experience in delivering integrated building solutions, from design and build…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
20Exact matchLondon, United KingdomHQ recorded Nov 6, 202651-200135 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
21Exact matchWesthill, United KingdomHQ recorded Nov 6, 2026201-500128 contacts →

Exact match

“Donaldson Timber Systems, a Donaldson Family Company, is the UK’s leading offsite timber systems manufacturer.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
22Exact matchLondon, United KingdomHQ recorded Nov 6, 2026201-500126 contacts →

Exact match

“Cilantro Engineering is a multi-discipline Building Services Contractor offering a vast range of Mechanical and Electrical Design & Installation services.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
23Exact matchOxfordshire, United KingdomHQ recorded Nov 6, 202651-200122 contacts →

Exact match

“Our mission is to excel in the design, installation and maintenance of the electro-technical systems that connect to create fit for purpose building environments.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
24Exact matchHull, United KingdomHQ recorded Nov 6, 202651-200120 contacts →

Exact match

“Neil Fisher started Airco in 1991.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
25Exact matchAndover, United KingdomHQ recorded Nov 6, 2026201-500120 contacts →

Exact match

“CCS provides professional compliance, energy and retrofit services to the social housing sector.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase

Showing 25 of 1,650 sustainable building system integrators based in the United Kingdom

See the full list, filter by size, metro and specialty, and access 10,024 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Sustainable building system integrators based in the United Kingdom at a glance

As of Nov 6, 2026
42.0%Verified-email coverage
14.5Average contacts per company
11-50Median size (employees)
13.9%Largest-city concentration · London
Nov 6, 2026Page data refreshed

Companies by employee count

1-10
735
11-50
643
51-200
181
201-500
40
501-1,000
11
1,001-5,000
5
5,001-10,000
1
10001+
1

Email recency for this list is measured worldwide rather than for United Kingdom, so it is reported there. Company counts and contact totals on this page are exact for United Kingdom, over 1,650 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 the United Kingdom whose business descriptions match “sustainable building system integrators” 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 10,024 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 November 6, 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 “sustainable building system integrators”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many sustainable building system integrators are there based in the United Kingdom?

RevenueBase identified 1,650 company matches for sustainable building system integrators associated with the United Kingdom as of November 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 has the most sustainable building system integrators?

London leads with 230 company records, followed by Bristol (34) and Glasgow (33).

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 10,024 professional contacts with verified work emails tracked across these 1,650 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 November 6, 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.