Company lists · Data refreshed September 2026

Top 25 Infrastructure development firms based in the United Kingdom

Name: Infrastructure development firms based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 20, 2026 727 companies tracked

RevenueBase identified 727 infrastructure development firms headquartered in the United Kingdom as of September 2026 and tracks 40,388 professional contacts across them, including 11,861 with verified work emails. London is the largest hub.

This list covers infrastructure development firms 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 20, 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 20, 2026 86% judged on-target in blind review

727Companies

40,388Contacts tracked

11,861Verified emails

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The 25 largest infrastructure development firms based in the United Kingdom

Ranked by team size

Top 25 of 727 infrastructure development firms based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 20, 2026. RevenueBase Smart Search rates how each company's information relates to infrastructure development firms: 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	Balfour Beatty PLC	Partial evidence	London, United KingdomHQ checked Sep 20, 2026	10001+	10,507 contacts →
	Partial evidence “Balfour Beatty is a leading international infrastructure group.” Source: RevenueBase Database · checked Sep 20, 2026
2	Ferrovial	Partial evidence	Amsterdam, United KingdomHQ checked Sep 20, 2026	10001+	5,782 contacts →
	Partial evidence “Ferrovial is a leading global infrastructure company transforming highways, airports, and energy around the world.” Source: RevenueBase Database · checked Sep 20, 2026
3	Murphy	Partial evidence	London, United KingdomHQ checked Sep 20, 2026	1,001-5,000	3,095 contacts →
	Partial evidence “Murphy is a leading international, multi-disciplined engineering and construction company founded in 1951 that improves life by delivering world-class infrastructure.” Source: RevenueBase Database · checked Sep 20, 2026
4	FM Conway LTD	Partial evidence	Sevenoaks, United KingdomHQ checked Sep 20, 2026	1,001-5,000	974 contacts →
	Partial evidence “FM Conway is a leading infrastructure services company delivering vital services in transportation, the built environment and open spaces for communities and businesses.” Source: RevenueBase Database · checked Sep 20, 2026
5	Amcogiffen	Indirect evidence	Barnsley, United KingdomHQ checked Sep 20, 2026	1,001-5,000	845 contacts →
	Indirect evidence “Who are we?” Source: RevenueBase Database · checked Sep 20, 2026
6	Taylor Woodrow	Partial evidence	Watford, United KingdomHQ checked Sep 20, 2026	501-1,000	631 contacts →
	Partial evidence “Engineering sustainable infrastructure for today and tomorrow.” Source: RevenueBase Database · checked Sep 20, 2026
7	Colas LTD	Partial evidence	Birmingham Business Park, United KingdomHQ checked Sep 20, 2026	1,001-5,000	459 contacts →
	Partial evidence “Colas is a world leader in the construction and maintenance of transport infrastructure.” Source: RevenueBase Database · checked Sep 20, 2026
8	Alun Griffiths Contractors LTD	Indirect evidence	Abergavenny, United KingdomHQ checked Sep 20, 2026	201-500	412 contacts →
	Indirect evidence “Welcome to / Croeso i Griffiths We are a sustainable civil engineering contractor that helps connect communities through road, rail, water, and utilities.” Source: RevenueBase Database · checked Sep 20, 2026
9	Morgan Sindall Group PLC	Indirect evidence	London, United KingdomHQ checked Sep 20, 2026	5,001-10,000	315 contacts →
	Indirect evidence “Morgan Sindall Group plc, the Partnerships, Fit Out and Construction Services Group, reported annual revenues of £5bn in full year 2025, employing over 8,500 employees and…” Source: RevenueBase Database · checked Sep 20, 2026
10	Tunnelcraft LTD	Indirect evidence	Basildon, United KingdomHQ checked Sep 20, 2026	51-200	275 contacts →
	Indirect evidence “Tunnelcraft Ltd is currently working for the BAM Nuttall.” Source: RevenueBase Database · checked Sep 20, 2026
11	Dyer & Butler	Partial evidence	Southampton, United KingdomHQ checked Sep 20, 2026	501-1,000	266 contacts →
	Partial evidence “Founded in 1979, Dyer & Butler is a multi-disciplined engineering services specialist focused on transport infrastructure including airports, rail and underground.” Source: RevenueBase Database · checked Sep 20, 2026
12	Readypower Group	Partial evidence	Reading, United KingdomHQ checked Sep 20, 2026	501-1,000	265 contacts →
	Partial evidence “The Readypower Group brings together three specialist businesses: Readypower Rail Services, delivering critical infrastructure solutions across the network; Readypower Terrawise…” Source: RevenueBase Database · checked Sep 20, 2026
13	Volkerlaser	Indirect evidence	Worcester, United KingdomHQ checked Sep 20, 2026	51-200	244 contacts →
	Indirect evidence “VolkerLaser is the UK's leading multi-functional contractor.” Source: RevenueBase Database · checked Sep 20, 2026
14	Breheny Civil Engineering	Indirect evidence	Ipswich, United KingdomHQ checked Sep 20, 2026	201-500	208 contacts →
	Indirect evidence “From formation in 1963 to today, we have grown to provide civil engineering services to almost two thirds of the country from our offices in Suffolk, Cambridgeshire, Yorkshire…” Source: RevenueBase Database · checked Sep 20, 2026
15	Infrared Capital Partners	Partial evidence	London, United KingdomHQ checked Sep 20, 2026	51-200	197 contacts →
	Partial evidence “InfraRed is a leading international mid-market infrastructure asset manager.” Source: RevenueBase Database · checked Sep 20, 2026
16	ECL Civil Engineering LTD	Indirect evidence	Bedford, United KingdomHQ checked Sep 20, 2026	501-1,000	192 contacts →
	Indirect evidence “From the time we have spent working with some of the U.K.'s most prominent housing developers, we have become highly adept in supporting large-scale residential-led strategic…” Source: RevenueBase Database · checked Sep 20, 2026
17	Project Centre LTD	Partial evidence	London, United KingdomHQ checked Sep 20, 2026	201-500	190 contacts →
	Partial evidence “Project Centre, part of Marston Holdings, is a multidisciplinary infrastructure and place consultancy shaping sustainable spaces across the UK.” Source: RevenueBase Database · checked Sep 20, 2026
18	RJ Mcleod Contractors Limited	Indirect evidence	Glasgow, United KingdomHQ checked Sep 20, 2026	201-500	172 contacts →
	Indirect evidence “RJ McLeod stands as one of the country’s leading civil engineering and building contractors.” Source: RevenueBase Database · checked Sep 20, 2026
19	United Living Connected IS NOW United Infrastructure	Indirect evidence	Widnes, United KingdomHQ checked Sep 20, 2026	201-500	170 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 20, 2026
20	Natta Building Company LTD	Partial evidence	Crondall, United KingdomHQ checked Sep 20, 2026	201-500	160 contacts →
	Partial evidence “Trading for over 50 years, Natta as a Principal Contractor specialises in civil engineering projects comprising section 278 and 38 infrastructure roads, sewers and services…” Source: RevenueBase Database · checked Sep 20, 2026
21	The Tamdown Group	Strong evidence	Braintree, United KingdomHQ checked Sep 20, 2026	201-500	158 contacts →
	Strong evidence “Tamdown is a market leading provider of infrastructure, groundworks and civil engineering services for residential, commercial and public sector developments in the South East of…” Source: RevenueBase Database · checked Sep 20, 2026
22	Rendel Limited	Indirect evidence	London, United KingdomHQ checked Sep 20, 2026	51-200	150 contacts →
	Indirect evidence “Rendel celebrated its 185th Anniversary in 2024, making us one of the oldest civil and structural engineering companies in the UK.” Source: RevenueBase Database · checked Sep 20, 2026
23	Marlborough Highways	Indirect evidence	Chelmsford, United KingdomHQ checked Sep 20, 2026	201-500	145 contacts →
	Indirect evidence “Marlborough is a dynamic, independent civil engineering company with 30 years’ experience in every aspect of traditional and contemporary civil engineering work.” Source: RevenueBase Database · checked Sep 20, 2026
24	Mackenzie Construction	Partial evidence	Glasgow, United KingdomHQ checked Sep 20, 2026	201-500	136 contacts →
	Partial evidence “Mackenzie Construction is a contractor positioned to design and construct infrastructure and building assets for public and private sector clients.” Source: RevenueBase Database · checked Sep 20, 2026
25	Envolve Infrastructure	Indirect evidence	Cardiff Road, United KingdomHQ checked Sep 20, 2026	201-500	136 contacts →
	Indirect evidence “We’re envolve, specialist civil engineers.” Source: RevenueBase Database · checked Sep 20, 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: infrastructure development firms. 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 infrastructure development firms.
Partial evidence: Its own public description names part of infrastructure development firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name infrastructure development firms. 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 727 infrastructure development firms based in the United Kingdom

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Infrastructure development firms based in the United Kingdom at a glance

As of Sep 20, 2026

29.4%Verified-email coverage

55.6Average contacts per company

11-50Median size (employees)

19.9%Largest-city concentration · London

Sep 20, 2026Page data refreshed

Companies by employee count

1-10

296

11-50

231

51-200

120

201-500

501-1,000

1,001-5,000

5,001-10,000

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 727 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 infrastructure development firms, 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 “infrastructure development firms”. 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 infrastructure development firms), 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 infrastructure development firms, 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, 11,861 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 20, 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.

Infrastructure development firms by metro

Infrastructure development firms in London145

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 infrastructure development firms, 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 infrastructure development firms are there based in the United Kingdom?

RevenueBase identified 727 infrastructure development firms 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?

Balfour Beatty PLC, headquartered in London, tops this list with the largest team on record.

Which city has the most infrastructure development firms?

London leads with 145 headquartered companies, followed by Manchester (10) and Glasgow (9).

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 11,861 verified decision-maker contacts tracked across these 727 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 20, 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.