Company lists · Data refreshed October 2026

Top 25 Building energy retrofit companies based in the United Kingdom

RevenueBase identified 385 company matches for building energy retrofit companies associated with the United Kingdom as of October 2026 and tracks 3,388 professional contacts across them, including 1,070 with verified work emails. London is the largest hub.

This list covers company matches for building energy retrofit companies 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 October 9, 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 9, 2026 How this list was built
385Companies
3,388Contacts tracked
1,070Verified emails
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The 25 largest building energy retrofit companies based in the United Kingdom

Ranked by team size
Top 25 of 385 company matches for building energy retrofit companies based in the United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Oct 9, 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 matchBristol, United KingdomHQ recorded Oct 9, 2026201-500111 contacts →

Exact match

“We are a leading provider of retrofit residential decarbonisation across the UK.”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
2Exact matchSkelmersdale, United KingdomHQ recorded Oct 9, 202651-20094 contacts →

Exact match

“Sustainable Building Services (UK) Ltd (SBS) is a purpose-led, multi-award-winning turnkey solutions provider specialising in retrofit energy efficiency and decarbonisation works…”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
3Exact matchLondon, United KingdomHQ recorded Oct 9, 202651-20081 contacts →

Exact match

“We deliver retrofit and decarbonisation projects across London and the Thames Corridor, with the capability to operate nationally through the support of the Workplace Futures…”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
4Exact matchKnowsley, United KingdomHQ recorded Oct 9, 202651-20075 contacts →

Exact match

“Established in 2016, we have grown to become one of the most reputable and reliable specialists within the renewable, heating, and insulation sectors in the United Kingdom.”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
5Exact matchNationwide, United KingdomHQ recorded Oct 9, 2026201-50067 contacts →

Exact match

“At 21 Degrees, we believe buildings should be designed for lower energy use, healthier spaces and better comfort.”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
6Exact matchBeckenham, United KingdomHQ recorded Oct 9, 202651-20063 contacts →

Exact match

“We’re a leading nationwide property services company established in 2013.”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
7Exact matchCardiff, United KingdomHQ recorded Oct 9, 202651-20063 contacts →

Exact match

“We're a proud B-Corp who are committed to helping the social housing sector move faster towards creating greener, healthier, and more affordable homes.”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
8Exact matchGillingham, United KingdomHQ recorded Oct 9, 202651-20058 contacts →

Exact match

“Primech is a specialist mechanical and electrical design and build contractor, with a strong focus on retrofit and upgrade projects across existing buildings and live environments.”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
9Exact matchKingsley Moor, United KingdomHQ recorded Oct 9, 2026201-50058 contacts →

Exact match

“Delivering Excellence in Housing Decarbonisation Broad Oak specialises in delivering high-quality decarbonisation and retrofit solutions.”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
10Exact matchLondon, United KingdomHQ recorded Oct 9, 202651-20057 contacts →

Exact match

“Forcia Limited is a construction company based out of Park Hill, London, United Kingdom.”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
11Exact matchBarking, United KingdomHQ recorded Oct 9, 202651-20054 contacts →

Exact match

“IZ Energy is pioneering a sustainable future.”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
12Exact matchStonehouse, United KingdomHQ recorded Oct 9, 202651-20047 contacts →

Exact match

“Secure your greener future with renewable energy solutions!”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
13Exact matchAltrincham, United KingdomHQ recorded Oct 9, 202651-20046 contacts →

Exact match

“Energy solutions made easy.”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
14Exact matchBrighouse, United KingdomHQ recorded Oct 9, 20261,001-5,00045 contacts →

Exact match

“Sureserve Energy Services North is a leading national installer of insulation, heating solutions and renewable technologies.”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
15Exact matchIrvine, United KingdomHQ recorded Oct 9, 202651-20042 contacts →

Exact match

“At Green Home Systems, we deliver whole-house retrofit solutions that make homes warmer, more energy efficient, and lower cost to run.”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
16Exact matchSouthampton, United KingdomHQ recorded Oct 9, 202651-20038 contacts →

Exact match

“Homelogic®, based in Southampton, Hampshire, are an innovative, forward-thinking company dedicated to bringing eco-friendly, cost effective energy saving solutions to the homes…”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
17Exact matchRearsby, United KingdomHQ recorded Oct 9, 2026201-50037 contacts →

Exact match

“Avonside Energy: Your Partner in Sustainable Building Solutions At Avonside Energy, we are dedicated to delivering best-in-class services across: New Build Insulation…”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
18Exact matchStafford, United KingdomHQ recorded Oct 9, 202611-5034 contacts →

Exact match

“Cutting carbon and tackling fuel poverty are two of the biggest challenges of the century.”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
19Exact matchFareham, United KingdomHQ recorded Oct 9, 202651-20031 contacts →

Exact match

“Hello.”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
20Exact matchBillingshurst, United KingdomHQ recorded Oct 9, 202611-5025 contacts →

Exact match

“Welcome to Energys Group.”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
21Exact matchLondon, United KingdomHQ recorded Oct 9, 202651-20024 contacts →

Exact match

“At Domna, we are on a mission to make every home in Great Britain green and sustainable.”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
22Exact matchStockton-on-tees, United KingdomHQ recorded Oct 9, 202651-20023 contacts →

Exact match

“Elite Energy – Powering a Greener, Smarter UK Elite Energy is an award-winning energy solutions company helping homeowners across the UK reduce energy bills, cut carbon emissions…”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
23Exact matchHalifax, United KingdomHQ recorded Oct 9, 202611-5023 contacts →

Exact match

“Eclipse Energy are specialists in providing affordable and efficient ways to keep your home warm and dry for less.”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
24Exact matchLondon, United KingdomHQ recorded Oct 9, 202611-5022 contacts →

Exact match

“RetrofitWorks is a ‘not for private profit’ co-operative, matching communities & homeowners who want to retrofit their homes, with local, quality assured SME assessors and…”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
25Exact matchHastings, United KingdomHQ recorded Oct 9, 202611-5021 contacts →

Exact match

“Osborne Energy are a leading provider of energy services and projects in the UK, providing Main and Sub-Contractor services and delivering domestic and commercial retrofit and…”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase

Showing 25 of 385 building energy retrofit companies based in the United Kingdom

See the full list, filter by size, metro and specialty, and access 1,070 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Building energy retrofit companies based in the United Kingdom at a glance

As of Oct 9, 2026
31.6%Verified-email coverage
8.8Average contacts per company
11-50Median size (employees)
13.8%Largest-city concentration · London
Oct 9, 2026Page data refreshed

Companies by employee count

1-10
178
11-50
151
51-200
41
201-500
9
1,001-5,000
3
5,001-10,000
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 385 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 “building energy retrofit companies” 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 1,070 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 9, 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.

Building energy retrofit companies by metro

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 “building energy retrofit companies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many building energy retrofit companies are there based in the United Kingdom?

RevenueBase identified 385 company matches for building energy retrofit companies associated with the 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?

Livgreen tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most building energy retrofit companies?

London leads with 53 company records, followed by Manchester (11) and Glasgow (8).

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 1,070 professional contacts with verified work emails tracked across these 385 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 9, 2026.

Ready to reach these companies? Verified emails and direct dials for all 385 building energy retrofit companies based in the United Kingdom. Start with a free account, no credit card.

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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.