Company lists · Data refreshed October 2026

Top 25 Electrical system installation contractors based in the United Kingdom

Name: Electrical system installation contractors based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Oct 12, 2026 4,545 companies tracked

RevenueBase identified 4,545 company matches for electrical system installation contractors associated with the United Kingdom as of October 2026 and tracks 19,972 professional contacts across them, including 4,865 with verified work emails. London is the largest hub.

This list covers company matches for electrical system installation contractors 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 12, 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 12, 2026 How this list was built

4,545Companies

19,972Contacts tracked

4,865Verified emails

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The 25 largest electrical system installation contractors based in the United Kingdom

Ranked by team size

Top 25 of 4,545 company matches for electrical system installation contractors based in the United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Oct 12, 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	Clarkson Evans LTD	Exact match	Gloucester, United KingdomHQ recorded Oct 12, 2026	501-1,000	336 contacts →
	Exact match “With over 850 staff, we are one of the UK’s leading electrical contractors and solar PV installers.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
2	MCS	Exact match	Bristol, United KingdomHQ recorded Oct 12, 2026	51-200	151 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 · Oct 12, 2026 · View company records in RevenueBase
3	G & A Barnie Group LTD	Exact match	Inverness, United KingdomHQ recorded Oct 12, 2026	201-500	117 contacts →
	Exact match “Premier quality workmanship and personal attention are characteristics of G&A Barnie.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
4	Darke & Taylor LTD	Exact match	Oxfordshire, United KingdomHQ recorded Oct 12, 2026	51-200	114 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 · Oct 12, 2026 · View company records in RevenueBase
5	Rock Power Connections LTD	Exact match	Bromsgrove, United KingdomHQ recorded Oct 12, 2026	51-200	104 contacts →
	Exact match “Rock Power Connections are experts in electrical connections with a proven track record of quality and safety.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
6	MSE LTD	Exact match	Redditch, United KingdomHQ recorded Oct 12, 2026	11-50	102 contacts →
	Exact match “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.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
7	Grant Walker Engineering	Exact match	London, United KingdomHQ recorded Oct 12, 2026	51-200	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 12, 2026 · View company records in RevenueBase
8	AKD	Exact match	Edinburgh, United KingdomHQ recorded Oct 12, 2026	51-200	80 contacts →
	Exact match “AKD’s clients get quick results, normally leading to reduced costs and gaining an improved service.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
9	Midwest Mechanical And Electrical Services LTD	Exact match	Wolverhampton, United KingdomHQ recorded Oct 12, 2026	201-500	64 contacts →
	Exact match “Electrical and Mechanical Contractors.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
10	Orton Group LTD	Exact match	Wombourne, United KingdomHQ recorded Oct 12, 2026	51-200	61 contacts →
	Exact match “01902 894871 Marking its 25th anniversary this year, Orton is a leading provider of electrical, mechanical, installation and maintenance services covering both commercial and…” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
11	Premier Electrics	Exact match	Magherafelt, United KingdomHQ recorded Oct 12, 2026	51-200	59 contacts →
	Exact match “Premier Electrics have been delivering exciting projects throughout Ireland, UK and Europe since 1993.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
12	Pitts Wilson Limited	Exact match	Bradford, United KingdomHQ recorded Oct 12, 2026	51-200	56 contacts →
	Exact match “Mechanical & Electrical Design and Installation company specialising in Commercial, Retail, Industrial and Leisure Projects.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
13	Fixatex LTD	Exact match	Hertford, United KingdomHQ recorded Oct 12, 2026	51-200	54 contacts →
	Exact match “Electrical & Fire Protection Services, Domestic & Commercial.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
14	RJ Power	Exact match	Sidcup, United KingdomHQ recorded Oct 12, 2026	51-200	53 contacts →
	Exact match “RJ Power Group is a specialist electrical contracting business, providing engineering solutions in the power sector.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
15	The Wiggett Group LTD	Exact match	Brentwood, United KingdomHQ recorded Oct 12, 2026	201-500	52 contacts →
	Exact match “Wiggett Electrical has gone from strength to strength.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
16	Powercor LTD	Exact match	Weybridge, United KingdomHQ recorded Oct 12, 2026	51-200	52 contacts →
	Exact match “Since 1998, Powercor have specialised in every aspect of electrical engineering.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
17	CD Engineering Services Limited	Exact match	Stockton-on-tees, United KingdomHQ recorded Oct 12, 2026	11-50	51 contacts →
	Exact match “Welcome to the CD Engineering Services Ltd.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
18	NES	Exact match	Inverness, United KingdomHQ recorded Oct 12, 2026	11-50	50 contacts →
	Exact match “NES is an Industrial and Commercial Electrical Engineering and Contracting business, based in the North and North East of Scotland.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
19	Evans Electrical LTD	Exact match	Cardiff, United KingdomHQ recorded Oct 12, 2026	51-200	48 contacts →
	Exact match “Evans Electrical Ltd is a long established respected professional company with a highly motivated team of approximately 120 dedicated staff.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
20	Lloyd Morris Electrical LTD	Exact match	Wrexham, United KingdomHQ recorded Oct 12, 2026	51-200	48 contacts →
	Exact match “Lloyd Morris Electrical Limited is a company of Electrical Engineers, specialising in the design, manufacture and installation of Electrical Distribution and Control Systems for…” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
21	NRT Group	Exact match	Banstead, United KingdomHQ recorded Oct 12, 2026	51-200	47 contacts →
	Exact match “Our aim is to be the first choice for electrical and engineering installations.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
22	SOL Services	Exact match	Milton Keynes, United KingdomHQ recorded Oct 12, 2026	51-200	44 contacts →
	Exact match “Based in Milton Keynes, SOL Services which was established in 2003, provide quality and reliable services in all aspects of commercial electrical installation and commercial…” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
23	JGF Electrical	Exact match	Dartford, United KingdomHQ recorded Oct 12, 2026	11-50	44 contacts →
	Exact match “Commercial Properties Commercial projects benefit from the time we invest in team training to deliver excellent industry standards throughout.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
24	Norwood Electrical UK LTD	Exact match	Lockington, United KingdomHQ recorded Oct 12, 2026	51-200	43 contacts →
	Exact match “Norwood Electrical (UK) Ltd offer a full range of electrical services and specialises in electrical compliance.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
25	Solid State Security LTD	Exact match	Hilldale, United KingdomHQ recorded Oct 12, 2026	11-50	42 contacts →
	Exact match “We are one of the UK’s leading specialist electrical contracting companies with over 35 years' experience in the design, supply, installation, commissioning and maintenance of…” Recorded in the RevenueBase company graph · Oct 12, 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 “electrical system installation 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 4,545 electrical system installation contractors based in the United Kingdom

See the full list, filter by size, metro and specialty, and access 4,865 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Electrical system installation contractors based in the United Kingdom at a glance

As of Oct 12, 2026

24.4%Verified-email coverage

4.4Average contacts per company

1-10Median size (employees)

6.1%Largest-city concentration · London

Oct 12, 2026Page data refreshed

Companies by employee count

1-10

2,938

11-50

1,340

51-200

139

201-500

501-1,000

1,001-5,000

10001+

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 4,545 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 “electrical system installation 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 4,865 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 12, 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.

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

How many electrical system installation contractors are there based in the United Kingdom?

RevenueBase identified 4,545 company matches for electrical system installation contractors 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?

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

Which city has the most electrical system installation contractors?

London leads with 278 company records, followed by Manchester (59) and Bristol (49).

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 4,865 professional contacts with verified work emails tracked across these 4,545 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 12, 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.