Company lists · Data refreshed September 2026

Top 25 Offsite construction companies based in the United Kingdom

Name: Offsite construction companies based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 17, 2026 248 companies tracked

RevenueBase identified 248 offsite construction companies headquartered in the United Kingdom as of September 2026 and tracks 4,740 professional contacts across them, including 2,090 with verified work emails. London is the largest hub.

This list covers offsite construction companies 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 17, 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 17, 2026 86% judged on-target in blind review

248Companies

4,740Contacts tracked

2,090Verified emails

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The 25 largest offsite construction companies based in the United Kingdom

Ranked by team size

Top 25 of 248 offsite construction companies based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 17, 2026. RevenueBase Smart Search rates how each company's information relates to offsite construction companies: 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	Portakabin	Strong evidence	York, United KingdomHQ checked Sep 17, 2026	1,001-5,000	1,206 contacts →
	Strong evidence “An industry leading modular and offsite construction specialist operating across ten European countries; England, Wales, Scotland, Northern Ireland, Republic of Ireland, France…” Source: RevenueBase Database · checked Sep 17, 2026
2	Alternative Heat LTD	Partial evidence	Banbridge, United KingdomHQ checked Sep 17, 2026	501-1,000	268 contacts →
	Partial evidence “With over 20 years of experience within the Commercial Offsite Fabrication industry, Alternative Heat have established themselves as a market leader in this sector.” Source: RevenueBase Database · checked Sep 17, 2026
3	MERIT	Strong evidence	Cramlington, United KingdomHQ checked Sep 17, 2026	n/a	261 contacts →
	Strong evidence “Merit is the UK’s leading offsite construction and manufacturing specialist.” Source: RevenueBase Database · checked Sep 17, 2026
4	Reds10	Partial evidence	London, United KingdomHQ checked Sep 17, 2026	201-500	256 contacts →
	Partial evidence “At Reds10, we are redefining construction for the modern world.” Source: RevenueBase Database · checked Sep 17, 2026
5	Hadley Group	Indirect evidence	Smethwick, United KingdomHQ checked Sep 17, 2026	501-1,000	227 contacts →
	Indirect evidence “We are a market-leading, globally active business built on engineering excellence, innovation in structural building performance and cold roll forming technology, with a…” Source: RevenueBase Database · checked Sep 17, 2026
6	Mcavoy	Indirect evidence	Knockmore Hill, United KingdomHQ checked Sep 17, 2026	51-200	153 contacts →
	Indirect evidence “McAvoy is one of the UK and Ireland’s market leaders in the precision manufacture and delivery of temporary and permanent modular buildings.” Source: RevenueBase Database · checked Sep 17, 2026
7	Donaldson Timber Systems	Partial evidence	Westhill, United KingdomHQ checked Sep 17, 2026	201-500	119 contacts →
	Partial evidence “Donaldson Timber Systems, a Donaldson Family Company, is the UK’s leading offsite timber systems manufacturer.” Source: RevenueBase Database · checked Sep 17, 2026
8	PCE Limited	Strong evidence	Tamworth, United KingdomHQ checked Sep 17, 2026	51-200	112 contacts →
	Strong evidence “PCE are pioneers in offsite system build solutions, with expertise across design, manufacture, and construction.” Source: RevenueBase Database · checked Sep 17, 2026
9	Innovaré Offsite Limited	Partial evidence	Coventry, United KingdomHQ checked Sep 17, 2026	51-200	77 contacts →
	Partial evidence “Innovaré Offsite is an Offsite specialist delivering #LowcarbonFireSafe structural solutions.” Source: RevenueBase Database · checked Sep 17, 2026
10	Tophat	Indirect evidence	London, United KingdomHQ checked Sep 17, 2026	501-1,000	75 contacts →
	Indirect evidence “The UK’s leader in technology-driven modular housing manufacturing Can you achieve your career goals with TopHat?” Source: RevenueBase Database · checked Sep 17, 2026
11	ESS Modular	Indirect evidence	London, United KingdomHQ checked Sep 17, 2026	201-500	64 contacts →
	Indirect evidence “With over 25 years in the industry, ESS is a leading provider of modular products, focusing on off-site solutions for clients in the public and private sectors.” Source: RevenueBase Database · checked Sep 17, 2026
12	JRL Modular	Indirect evidence	Newark, United KingdomHQ checked Sep 17, 2026	201-500	64 contacts →
	Indirect evidence “JRL Modular is part of the JRL Group.” Source: RevenueBase Database · checked Sep 17, 2026
13	Integra Buildings Limited	Partial evidence	Paull, United KingdomHQ checked Sep 17, 2026	51-200	61 contacts →
	Partial evidence “We’re a multi award-winning designer and manufacturer of innovative, offsite modular buildings and anti-vandal solutions.” Source: RevenueBase Database · checked Sep 17, 2026
14	Mansell Building Solutions	Indirect evidence	Chadderton, United KingdomHQ checked Sep 17, 2026	201-500	57 contacts →
	Indirect evidence “Established in 1992, we’re one of the UK’s longest established and most experienced specialist contractors in our field.” Source: RevenueBase Database · checked Sep 17, 2026
15	Rollalong LTD	Strong evidence	Wimborne, United KingdomHQ checked Sep 17, 2026	51-200	54 contacts →
	Strong evidence “Rollalong Ltd is a leading modular and offsite construction manufacturing company based in Dorset.” Source: RevenueBase Database · checked Sep 17, 2026
16	British Offsite Limited	Strong evidence	Braintree, United KingdomHQ checked Sep 17, 2026	51-200	48 contacts →
	Strong evidence “British Offsite is a highly advanced manufacturing and construction company specialising in the design and production of superstructure and interior fit modular construction…” Source: RevenueBase Database · checked Sep 17, 2026
17	TIDE	Partial evidence	London, United KingdomHQ checked Sep 17, 2026	51-200	46 contacts →
	Partial evidence “Tide and Vision are world leaders in volumetric construction.” Source: RevenueBase Database · checked Sep 17, 2026
18	Fasthouse	Indirect evidence	Co Derry, United KingdomHQ checked Sep 17, 2026	51-200	46 contacts →
	Indirect evidence “Established in 2015, FastHouse designs, manufactures and installs high-performance housing and prefabricated timber frame panelised building systems.” Source: RevenueBase Database · checked Sep 17, 2026
19	BRG Technologies	Partial evidence	Cheltenham, United KingdomHQ checked Sep 17, 2026	51-200	46 contacts →
	Partial evidence “BRG Technologies is the global leader in the off-site construction of mission-critical facilities, specialising in the data centre and healthcare sectors.” Source: RevenueBase Database · checked Sep 17, 2026
20	Space4	Partial evidence	Birmingham, United KingdomHQ checked Sep 17, 2026	51-200	43 contacts →
	Partial evidence “Space4 is the offsite manufacturing arm of Persimmon Homes, delivering advanced timber frame solutions that drive efficiency, quality and sustainability across our developments.” Source: RevenueBase Database · checked Sep 17, 2026
21	KES Group	Indirect evidence	Strabane, United KingdomHQ checked Sep 17, 2026	51-200	33 contacts →
	Indirect evidence “KES Group brings together engineering expertise, advanced manufacturing and project delivery under one roof.” Source: RevenueBase Database · checked Sep 17, 2026
22	P Mcvey Building Systems	Strong evidence	Toomebridge, United KingdomHQ checked Sep 17, 2026	51-200	31 contacts →
	Strong evidence “P McVey Building Systems: Leading the Way in Modular and Offsite Construction Solutions With over 40 years of experience, P McVey Building Systems has become a trusted leader in…” Source: RevenueBase Database · checked Sep 17, 2026
23	Lighthouse	Indirect evidence	Sheffield, United KingdomHQ checked Sep 17, 2026	51-200	31 contacts →
	Indirect evidence “Lighthouse was founded in 2020 with a bold vision: to revolutionise housebuilding and usher in a new era of quality, sustainability and speed.” Source: RevenueBase Database · checked Sep 17, 2026
24	Ideal Building Systems LTD	Indirect evidence	Bridlington, United KingdomHQ checked Sep 17, 2026	51-200	30 contacts →
	Indirect evidence “Ideal Building Systems are an independent family owned company with many years of experience in the modular building industry.” Source: RevenueBase Database · checked Sep 17, 2026
25	Automated Architecture Auar	Indirect evidence	London, United KingdomHQ checked Sep 17, 2026	11-50	30 contacts →
	Indirect evidence “AUAR is the manufacturing partner for homebuilders.” Source: RevenueBase Database · checked Sep 17, 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: offsite construction companies. 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 offsite construction companies.
Partial evidence: Its own public description names part of offsite construction companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name offsite construction companies. 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 248 offsite construction companies based in the United Kingdom

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Offsite construction companies based in the United Kingdom at a glance

As of Sep 17, 2026

44.1%Verified-email coverage

19.1Average contacts per company

11-50Median size (employees)

11.3%Largest-city concentration · London

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

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 248 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 offsite construction companies, 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 “offsite construction companies”. 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 offsite construction companies), 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 offsite construction companies, 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, 2,090 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 17, 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.

Offsite construction companies by metro

Offsite construction companies in London28

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 offsite construction companies, 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 offsite construction companies are there based in the United Kingdom?

RevenueBase identified 248 offsite construction companies 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?

Portakabin, headquartered in York, tops this list with the largest team on record.

Which city has the most offsite construction companies?

London leads with 28 headquartered companies, followed by Hull (7) and Leeds (4).

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 2,090 verified decision-maker contacts tracked across these 248 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 17, 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.