Company lists · Data refreshed October 2026

Top 25 Modular cleanroom contractors based in the United Kingdom

RevenueBase identified 83 company matches for modular cleanroom contractors associated with the United Kingdom as of October 2026 and tracks 1,095 professional contacts across them, including 416 with verified work emails. London is the largest hub.

This list covers company matches for modular cleanroom 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 18, 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 18, 2026 How this list was built
83Companies
1,095Contacts tracked
416Verified emails
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The 25 largest modular cleanroom contractors based in the United Kingdom

Ranked by team size
Top 25 of 83 company matches for modular cleanroom contractors based in the United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Oct 18, 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.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchKnockmore Hill, United KingdomHQ recorded Oct 18, 202651-200146 contacts →

Exact match

“McAvoy is one of the UK and Ireland’s market leaders in the precision manufacture and delivery of temporary and permanent modular buildings.”

Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
2Exact matchBolton, United KingdomHQ recorded Oct 18, 202651-200135 contacts →

Exact match

“In the early 1960s, Howorth’s experience and skills were applied in response to the needs of the medical profession.”

Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
3Exact matchHeywood, United KingdomHQ recorded Oct 18, 202651-20060 contacts →

Exact match

“Envair Technology is the unified brand of Envair and Total Containment Solutions (TCS), a single source provider of next generation clean air and containment systems.”

Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
4Exact matchManchester, United KingdomHQ recorded Oct 18, 202651-20039 contacts →

Exact match

“Laboratories, cleanrooms, pharmaceutical facilities, and research centres around the world trust us to deliver clean air and containment solutions that help you create safer, more…”

Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
5Exact matchLancaster, United KingdomHQ recorded Oct 18, 202611-5035 contacts →

Exact match

“With trusted solutions, proven expertise, and everything you need from one reliable source, we take the complexity out of cleanroom ownership.”

Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
6Exact matchHuddersfield Yorkshire, United KingdomHQ recorded Oct 18, 202651-20034 contacts →

Exact match

“Extract Technology has over 70 years of engineering heritage in aseptic and containment systems for pharmaceutical, biopharmaceutical, nuclear containment, and radiopharmaceutical…”

Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
7Exact matchMirfield, United KingdomHQ recorded Oct 18, 202611-5031 contacts →

Exact match

“PBSC designs and manufactures bespoke cleanroom and high containment systems that set recognised standards in containment engineering worldwide.”

Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
8Exact matchManchester, United KingdomHQ recorded Oct 18, 202611-5018 contacts →

Exact match

“Asgard Controlled Environments are a Turnkey Cleanroom Design and Build contractor who have a wealth of experience of designing, installing and managing the construction of…”

Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
9Exact matchHook, United KingdomHQ recorded Oct 18, 202611-5015 contacts →

Exact match

“Enbloc Ltd is a design and build cleanroom and containment suite construction company operating in the Pharmaceutical, Biotech, Healthcare, electronics industries.”

Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
10Exact matchHull, United KingdomHQ recorded Oct 18, 202611-5011 contacts →

Exact match

“AT INTERTECH CONTRACTS UK WE KNOW THE IMPORTANCE OF RELIABLE, QUALITY WORKMANSHIP.”

Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
11Exact matchStockport, United KingdomHQ recorded Oct 18, 202611-5011 contacts →

Exact match

“With over 60 years experience Bassaire is the longest established cleanroom company in the UK.”

Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
12Exact matchBeverley, United KingdomHQ recorded Oct 18, 202611-5011 contacts →

Exact match

“Working nationwide installing a wide variety of modular buildings.”

Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
13Exact matchGlasgow, United KingdomHQ recorded Oct 18, 202611-5011 contacts →

Exact match

“Cleanroom Zone provides a service that specializes in the cleaning of cleanrooms and controlled environments.”

Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
14Exact matchDudley, United KingdomHQ recorded Oct 18, 202611-5010 contacts →

Exact match

“Offsite Manufacturers and installers of modular systems”

Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
15Exact matchNewcastle Upon Tyne, United KingdomHQ recorded Oct 18, 202611-5010 contacts →

Exact match

“At Aircare, we are more than just a service provider; we are your partners in achieving excellence across a spectrum of industries.”

Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
16Exact matchBeverley, United KingdomHQ recorded Oct 18, 202611-5010 contacts →

Exact match

“Expert site services offer modular building installation and removal.”

Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
17Exact matchDerbyshire, United KingdomHQ recorded Oct 18, 202611-508 contacts →

Exact match

“We are suppliers of new and used, high quality portable modular buildings.”

Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
18Exact matchRochester, United KingdomHQ recorded Oct 18, 202611-507 contacts →

Exact match

“Clean Room Construction (CRC) has been designing and building cleanrooms and controlled environments for the science and technology sector since 1967.”

Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
19Exact matchBillericay, United KingdomHQ recorded Oct 18, 202611-507 contacts →

Exact match

“Maxi Space is a leading provider of modular construction and space solutions, delivering high-quality, adaptable, and intelligently engineered buildings for organisations…”

Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
20Exact matchSheffield, United KingdomHQ recorded Oct 18, 202611-507 contacts →

Exact match

“Medexs UK design manufacture and install innovative, high quality, specialised ventilation systems and solutions specifically designed for healthcare settings.”

Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
21Exact matchCardiff, United KingdomHQ recorded Oct 18, 202611-506 contacts →

Exact match

“If you represent a construction company that needs temporary or semi-permenent buildings, whilst completing a construction project, we have a solution for whatever you need.”

Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
22Exact matchLancing, United KingdomHQ recorded Oct 18, 202611-506 contacts →

Exact match

“Established since 1980, Astra Group is specialised in the design and manufacture of specialist products for cleanrooms, controlled environments and hazardous areas.”

Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
23Exact matchRochford, United KingdomHQ recorded Oct 18, 202651-2005 contacts →

Exact match

“Modular Engineering provides an efficient solution to the challenges faced within today’s construction sector.”

Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
24Exact matchBradford, United KingdomHQ recorded Oct 18, 20261-105 contacts →

Exact match

“MBOSS - Modular Building One Stop Shop Designed as service supplier to the Modular Industry, MBOSS Ltd has grown to provide Modular Buildings (Pods or Podulars) to the Domestic…”

Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
25Exact matchWilmslow, United KingdomHQ recorded Oct 18, 20261-104 contacts →

Exact match

“ISO Cleanroom was set up by the founder, Toni Horsfield to plug a gap in the market for accurate, simple and honest cleanroom support.”

Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase

Showing 25 of 83 modular cleanroom contractors based in the United Kingdom

See the full list, filter by size, metro and specialty, and access 416 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Modular cleanroom contractors based in the United Kingdom at a glance

As of Oct 18, 2026
38.0%Verified-email coverage
13.2Average contacts per company
11-50Median size (employees)
4.8%Largest-city concentration · London
Oct 18, 2026Page data refreshed

Companies by employee count

1-10
27
11-50
43
51-200
12
1,001-5,000
1

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 83 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 “modular cleanroom 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 416 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 18, 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.

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 “modular cleanroom contractors”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many modular cleanroom contractors are there based in the United Kingdom?

RevenueBase identified 83 company matches for modular cleanroom 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?

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

Which city has the most modular cleanroom contractors?

London leads with 4 company records, followed by Manchester (3) and York (3).

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 416 professional contacts with verified work emails tracked across these 83 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 18, 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.