Company lists · Data refreshed September 2026
Top 25 Commercial electrical contractors based in the United Kingdom
RevenueBase identified 4,559 commercial electrical contractors headquartered in the United Kingdom as of September 2026 and tracks 28,577 professional contacts across them, including 8,179 with verified work emails. London is the largest hub.
This list covers commercial electrical contractors headquartered in the United Kingdom, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 16, 2026.
Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, 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 25 largest commercial electrical contractors based in the United Kingdom
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 1,126 contacts → | ||||
Indirect evidence “At MJ Quinn we believe in creating great connections, with our customers, our people and our world.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 2 | 661 contacts → | ||||
Indirect evidence “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…” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 3 | 519 contacts → | ||||
Indirect evidence “Dodd Group was formed in 1947 in Shropshire and has remained a privately owned family business.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 4 | 412 contacts → | ||||
Partial evidence “Quartzelec is a leading independent electrical engineering group delivering solutions and services in both UK and global markets.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 5 | 205 contacts → | ||||
Partial evidence “Part of the SCCI Group, SCCI Alphatrack designs, installs, and maintains connected building systems across social housing, commercial property, new builds, and public sector…” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 6 | 138 contacts → | ||||
Partial evidence “MCS Ltd are specialist building services engineers covering all aspects of commercial and industrial building services and infrastructure engineering across varying market sectors.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 7 | 132 contacts → | ||||
Indirect evidence “Smith & Byford is a family-owned and operated building services company.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 8 | 123 contacts → | ||||
Strong evidence “Cilantro Engineering is a multi-discipline Building Services Contractor offering a vast range of Mechanical and Electrical Design & Installation services.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 9 | 119 contacts → | ||||
Partial evidence “Commercial Maintenance Services UK Ltd (CMS) is a nationwide market leader in Facilities and Commercial Building Maintenance-proudly built on the values of Responsiveness…” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 10 | 114 contacts → | ||||
Partial evidence “LJJ formed in 2001 as a private limited company and is a multi-disciplined organisation capable of completing major mechanical, electrical and public health service contracts in a…” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 11 | 112 contacts → | ||||
Indirect evidence “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.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 12 | 111 contacts → | ||||
Indirect evidence “Founded in 1988, we are a family-owned business of passionate engineers who specialise in building services-driven construction projects, undertaking all major works in-house.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 13 | 109 contacts → | ||||
Indirect evidence “Premier quality workmanship and personal attention are characteristics of G&A Barnie.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 14 | 109 contacts → | ||||
Partial evidence “Founded in 1957, Stothers (M&E) Ltd is a national market leader in the provision of Mechanical and Electrical Building Services and Contract Maintenance.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 15 | 105 contacts → | ||||
Partial evidence “Rock Power Connections are experts in electrical connections with a proven track record of quality and safety.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 16 | 103 contacts → | ||||
Indirect evidence “JCW Energy Services is a privately held SME business operating in the building services engineering sector throughout the UK.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 17 | 101 contacts → | ||||
Partial evidence “MSE are a midlands based building services company and have over 30 years experience in the commercial and industrial environment working with a broad range of clients.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 18 | 100 contacts → | ||||
Indirect evidence “Our Engineering Services business stream works across the UK’s built environment via three regional areas of North, Central and London and South.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 19 | 99 contacts → | ||||
Partial evidence “Woodford specialise in mechanical and electrical building services for the construction market.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 20 | 96 contacts → | ||||
Partial evidence “DPL Group consists of multiple divisions, including Mechanical & Electrical Installations, Fire & Security Installations and Renewable Technologies.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 21 | 90 contacts → | ||||
Indirect evidence “Oakray was established in 1979 and we are very proud of our long heritage.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 22 | 88 contacts → | ||||
Partial evidence “Key Group is a leading complete solution provider of M&E, Store fitting, construction management and Asset Replacement within the retail & Commercial sectors.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 23 | 85 contacts → | ||||
Strong evidence “Gloster MEP Ltd are a dynamic driven Mechanical and Electrical Contractor, well known within the industry for successfully delivering building services solutions to the Central…” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 24 | 83 contacts → | ||||
Strong evidence “Industry leading Mechanical and Electrical Maintenance Contractor providing essential services to household names within the leisure and retail sectors.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 25 | 81 contacts → | ||||
Strong evidence “Grant Walker Engineering specialise in the complete installation of Electrical and Mechanical systems across all work sectors including quality office developments, commercial and…” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
RevenueBase Smart Search
RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: commercial electrical contractors. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.
- Strong evidence
- The company's own public description of its business names commercial electrical contractors.
- Partial evidence
- Its own public description names part of commercial electrical contractors, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name commercial electrical contractors. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.
RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.
Showing 25 of 4,559 commercial electrical contractors based in the United Kingdom
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Commercial electrical contractors based in the United Kingdom at a glance
As of Sep 16, 2026Companies by employee count
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 4,559 companies.
How this list was built
Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among commercial electrical contractors, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.
- Source
- The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
- What qualifies
- Companies headquartered in the United Kingdom whose own description of what they do matches “commercial electrical contractors”. Matching reads each company's description, not its industry code or its name.
- RevenueBase Smart Search
- RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names commercial electrical contractors), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
- What we exclude
- Companies whose own description does not clearly place them among commercial electrical contractors, and records with no verified work email. Companies headquartered outside United Kingdom are excluded even when they keep an office there.
- Match quality
- In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
- 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 listed company carries at least one verified work email, 8,179 across the full list. 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 September 16, 2026. Lists refresh periodically as the graph is re-checked.
- Corrections
- Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.
Commercial electrical contractors by metro
- Commercial electrical contractors in London322
- Commercial electrical contractors in Bristol55
- Commercial electrical contractors in Nottingham53
- Commercial electrical contractors in Manchester52
- Commercial electrical contractors in Birmingham48
- Commercial electrical contractors in Leeds43
- Commercial electrical contractors in Glasgow38
- Commercial electrical contractors in Sheffield37
- Commercial electrical contractors in Southampton36
- Commercial electrical contractors in Hull35
- Commercial electrical contractors in Leicester35
- Commercial electrical contractors in Liverpool31
- Commercial electrical contractors in Northampton26
- Commercial electrical contractors in Gloucester25
- Commercial electrical contractors in Portsmouth25
- Commercial electrical contractors in Warrington25
Frequently asked
What is RevenueBase Smart Search?
RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names commercial electrical contractors, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.
How many commercial electrical contractors are there based in the United Kingdom?
RevenueBase identified 4,559 commercial electrical contractors headquartered in the United Kingdom as of September 2026, matched on each company's own description of what it does rather than its industry code.
What is the largest company on this list?
MJ Quinn, headquartered in Prescot, tops this list with the largest team on record.
Which city has the most commercial electrical contractors?
London leads with 322 headquartered companies, followed by Bristol (55) and Nottingham (53).
How do I get contact information for these companies?
A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 8,179 verified decision-maker contacts tracked across these 4,559 companies.
How current is this list?
The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 16, 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 Smart Search, 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.
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