Company lists · Data refreshed September 2026

Top 25 Electrical design consultants based in the United Kingdom

Name: Electrical design consultants based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 19, 2026 3,174 companies tracked

RevenueBase identified 3,174 electrical design consultants headquartered in the United Kingdom as of September 2026 and tracks 21,349 professional contacts across them, including 6,978 with verified work emails. London is the largest hub.

This list covers electrical design consultants 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 19, 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.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 19, 2026 86% judged on-target in blind review

3,174Companies

21,349Contacts tracked

6,978Verified emails

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The 25 largest electrical design consultants based in the United Kingdom

Ranked by team size

Top 25 of 3,174 electrical design consultants based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 19, 2026. RevenueBase Smart Search rates how each company's information relates to electrical design consultants: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Hoare LEA	Strong evidence	London, United KingdomHQ checked Sep 19, 2026	501-1,000	1,103 contacts →
	Strong evidence “We are an award-winning engineering consultancy with a creative team of engineers, designers, and technical specialists.” Source: RevenueBase Database · checked Sep 19, 2026
2	Black & White Engineering	Partial evidence	Newcastle Upon Tyne, United KingdomHQ checked Sep 19, 2026	1,001-5,000	888 contacts →
	Partial evidence “Black & White Engineering is a global, award-winning critical buildings and infrastructure engineering consultancy.” Source: RevenueBase Database · checked Sep 19, 2026
3	Brush Group	Indirect evidence	Loughborough, United KingdomHQ checked Sep 19, 2026	501-1,000	367 contacts →
	Indirect evidence “We support the global drive to net zero with innovative, engineered solutions that address grid resilience and systems challenges, facilitate electrification of transport and…” Source: RevenueBase Database · checked Sep 19, 2026
4	Actemium UK	Partial evidence	Birmingham, United KingdomHQ checked Sep 19, 2026	501-1,000	190 contacts →
	Partial evidence “At Actemium UK, we are expert electrical, automation and mechanical engineers delivering bespoke engineering solutions across industry, infrastructure and beyond.” Source: RevenueBase Database · checked Sep 19, 2026
5	Z-Tech Control Systems LTD	Indirect evidence	Swavesey, United KingdomHQ checked Sep 19, 2026	201-500	156 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 19, 2026
6	Asee Group	Partial evidence	Newry, United KingdomHQ checked Sep 19, 2026	51-200	151 contacts →
	Partial evidence “ASEE Group is a leader in mechanical and electrical engineering, specialising in generator integration and full-service installations for 45+ years.” Source: RevenueBase Database · checked Sep 19, 2026
7	AF Switchgear	Indirect evidence	Sutton-in-ashfield, United KingdomHQ checked Sep 19, 2026	201-500	117 contacts →
	Indirect evidence “AF Switchgear is one of the UK's largest switchgear manufacturers and set the standard for LV Switchgear and Power Distribution.” Source: RevenueBase Database · checked Sep 19, 2026
8	Darke & Taylor LTD	Partial evidence	Oxfordshire, United KingdomHQ checked Sep 19, 2026	51-200	112 contacts →
	Partial 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 19, 2026
9	Rock Power Connections LTD	Partial evidence	Bromsgrove, United KingdomHQ checked Sep 19, 2026	51-200	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 19, 2026
10	Picow Engineering Group	Strong evidence	Runcorn, United KingdomHQ checked Sep 19, 2026	51-200	88 contacts →
	Strong evidence “Mechanical, Electrical, Design and Construction Services Since 1977, Picow Engineering has been delivering a cost-effective engineering service to a growing number of blue chip…” Source: RevenueBase Database · checked Sep 19, 2026
11	Services Design Solution SDS	Strong evidence	South West, United KingdomHQ checked Sep 19, 2026	51-200	87 contacts →
	Strong evidence “SDS is a forward-looking, dynamic construction consultancy specialising in the design of sustainable, mechanical and electrical engineering systems for buildings.” Source: RevenueBase Database · checked Sep 19, 2026
12	DDD Design LTD	Partial evidence	Kent, United KingdomHQ checked Sep 19, 2026	n/a	87 contacts →
	Partial evidence “About us Our lighting design team in the Southeast of England has over 38 years of experience within the lighting industry, with a range of early backgrounds within product…” Source: RevenueBase Database · checked Sep 19, 2026
13	Grant Walker Engineering	Partial evidence	London, United KingdomHQ checked Sep 19, 2026	51-200	81 contacts →
	Partial 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 19, 2026
14	AKD	Indirect evidence	Edinburgh, United KingdomHQ checked Sep 19, 2026	51-200	79 contacts →
	Indirect evidence “AKD’s clients get quick results, normally leading to reduced costs and gaining an improved service.” Source: RevenueBase Database · checked Sep 19, 2026
15	Global Substation Solutions LTD	Indirect evidence	Hebburn, United KingdomHQ checked Sep 19, 2026	51-200	75 contacts →
	Indirect evidence “Established in 2006, Global Substation Solutions Ltd (GSS) are a dynamic power system engineering company, providing turnkey project services to the UK and international…” Source: RevenueBase Database · checked Sep 19, 2026
16	Delap & Waller	Partial evidence	Antrim /, United KingdomHQ checked Sep 19, 2026	51-200	73 contacts →
	Partial evidence “Delap & Waller Mechanical and Electrical Building Services Engineers was founded in 1911, and to this day we remain a leader in the field of Mechanical and Electrical Building…” Source: RevenueBase Database · checked Sep 19, 2026
17	Harniss Building Services Solutions	Strong evidence	Kettering, United KingdomHQ checked Sep 19, 2026	51-200	69 contacts →
	Strong evidence “Harniss is a dynamic independent mechanical and electrical UK based design consultancy and contractor.” Source: RevenueBase Database · checked Sep 19, 2026
18	JDP	Strong evidence	Reading, United KingdomHQ checked Sep 19, 2026	11-50	68 contacts →
	Strong evidence “JDP is a Building Services Engineering Consultancy with offices in Reading, employing engineers with practical design skills.” Source: RevenueBase Database · checked Sep 19, 2026
19	DSSR	Partial evidence	Manchester, United KingdomHQ checked Sep 19, 2026	51-200	67 contacts →
	Partial evidence “DSSR is a forward-thinking, award-winning company of Consulting Engineers specialising in all aspects of Building Services and Sustainability design.” Source: RevenueBase Database · checked Sep 19, 2026
20	IPEC	Indirect evidence	Manchester, United KingdomHQ checked Sep 19, 2026	11-50	64 contacts →
	Indirect evidence “IPEC Limited was founded in 1995 with the objective of transferring cutting-edge technology to the power industry by generating a dialogue between academic research, industry, and…” Source: RevenueBase Database · checked Sep 19, 2026
21	ETA Projects LTD	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	11-50	62 contacts →
	Indirect evidence “Chosen to deliver, trusted to care - for 30 years we’ve worked with clients across a diverse range of sectors to deliver safe and sustainable engineering solutions that prioritise…” Source: RevenueBase Database · checked Sep 19, 2026
22	CBG Consultants LTD	Partial evidence	London, United KingdomHQ checked Sep 19, 2026	51-200	61 contacts →
	Partial evidence “As an ambitious building services consultancy, at CBG Consultants we have a strong commitment to excellence.” Source: RevenueBase Database · checked Sep 19, 2026
23	Banyards	Strong evidence	London, United KingdomHQ checked Sep 19, 2026	51-200	58 contacts →
	Strong evidence “We are a specialist consultancy business delivering mechanical and electrical design and commissioning consultancy.” Source: RevenueBase Database · checked Sep 19, 2026
24	Premier Electrics	Partial evidence	Magherafelt, United KingdomHQ checked Sep 19, 2026	51-200	58 contacts →
	Partial evidence “Premier Electrics have been delivering exciting projects throughout Ireland, UK and Europe since 1993.” Source: RevenueBase Database · checked Sep 19, 2026
25	Qoda Consulting	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	51-200	58 contacts →
	Indirect evidence “Welcome to QODA: working hard to meet the needs of our clients and all those who use the buildings we help to create.” Source: RevenueBase Database · checked Sep 19, 2026

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: electrical design consultants. 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 electrical design consultants.
Partial evidence: Its own public description names part of electrical design consultants, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name electrical design consultants. 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 3,174 electrical design consultants based in the United Kingdom

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Electrical design consultants based in the United Kingdom at a glance

As of Sep 19, 2026

32.7%Verified-email coverage

6.7Average contacts per company

1-10Median size (employees)

7.2%Largest-city concentration · London

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

1,961

11-50

1,003

51-200

135

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 3,174 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 electrical design consultants, 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 “electrical design consultants”. 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 electrical design consultants), 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 electrical design consultants, 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, 6,978 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 19, 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.

Electrical design consultants by metro

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 electrical design consultants, 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 electrical design consultants are there based in the United Kingdom?

RevenueBase identified 3,174 electrical design consultants 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?

Hoare LEA, headquartered in London, tops this list with the largest team on record.

Which city has the most electrical design consultants?

London leads with 227 headquartered companies, followed by Manchester (55) and Nottingham (46).

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 6,978 verified decision-maker contacts tracked across these 3,174 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 19, 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.