Company lists · Data refreshed September 2026

Top 25 Tenant improvement contractors based in the United Kingdom

Name: Tenant improvement contractors 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 918 companies tracked

RevenueBase identified 918 tenant improvement contractors headquartered in the United Kingdom as of September 2026 and tracks 5,179 professional contacts across them, including 2,247 with verified work emails. London is the largest hub.

This list covers tenant improvement contractors 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

918Companies

5,179Contacts tracked

2,247Verified emails

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The 25 largest tenant improvement contractors based in the United Kingdom

Ranked by team size

Top 25 of 918 tenant improvement contractors 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 tenant improvement contractors: 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	Maris Interiors	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	51-200	230 contacts →
	Indirect evidence “Maris Interiors LLP - We create award winning interior spaces and are the UK's leading specialist in both workplace and education space design and build.” Source: RevenueBase Database · checked Sep 19, 2026
2	Harvey Shopfitters Limited	Partial evidence	Bristol, United KingdomHQ checked Sep 19, 2026	51-200	96 contacts →
	Partial evidence “Among the top 20 leisure, retail, office & commercial fit-out contractors in the UK.” Source: RevenueBase Database · checked Sep 19, 2026
3	Workplace Creations	Partial evidence	London, United KingdomHQ checked Sep 19, 2026	51-200	94 contacts →
	Partial evidence “We are an award-winning Design & Build contractor specialising in commercial interiors and consultancy.” Source: RevenueBase Database · checked Sep 19, 2026
4	Cubicworks	Indirect evidence	Manchester, United KingdomHQ checked Sep 19, 2026	51-200	90 contacts →
	Indirect evidence “Our industry can be a difficult market place to navigate.” Source: RevenueBase Database · checked Sep 19, 2026
5	KITT	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	51-200	77 contacts →
	Indirect evidence “Kitt manages workspaces for companies that want an office worth leaving home for.” Source: RevenueBase Database · checked Sep 19, 2026
6	ADT Workplace	Indirect evidence	Greenside Way, United KingdomHQ checked Sep 19, 2026	51-200	67 contacts →
	Indirect evidence “At ADT Workplace, we excel in creating inspiring office spaces for businesses of all sizes.” Source: RevenueBase Database · checked Sep 19, 2026
7	APSS	Indirect evidence	Lincoln, United KingdomHQ checked Sep 19, 2026	11-50	52 contacts →
	Indirect evidence “APSS - Commercial interior design and fit out specialists since 1997.” Source: RevenueBase Database · checked Sep 19, 2026
8	Greenmount Projects	Indirect evidence	Ashton-in-makerfield, United KingdomHQ checked Sep 19, 2026	11-50	48 contacts →
	Indirect evidence “We are an award-winning, turnkey design, construction, and maintenance company transforming commercial spaces in the North West.” Source: RevenueBase Database · checked Sep 19, 2026
9	Pure Fitout	Indirect evidence	Belfast, United KingdomHQ checked Sep 19, 2026	51-200	47 contacts →
	Indirect evidence “We believe in providing a fully integrated outlook on development and fit out using sustainable construction, and environmental best practices at all times.” Source: RevenueBase Database · checked Sep 19, 2026
10	Rhino Interiors Group	Indirect evidence	Birmingham, United KingdomHQ checked Sep 19, 2026	11-50	47 contacts →
	Indirect evidence “Rhino Interiors Group are a leading commercial specialist for Workplace Consultancy and Office Design, Office Fit-out/Refurbishment, Office Furniture, Warehousing…” Source: RevenueBase Database · checked Sep 19, 2026
11	Beacons Business Interiors	Indirect evidence	Brecon, United KingdomHQ checked Sep 19, 2026	51-200	43 contacts →
	Indirect evidence “Commercial Interior Design and fit-out specialists.” Source: RevenueBase Database · checked Sep 19, 2026
12	RSR	Indirect evidence	Milton Keynes, United KingdomHQ checked Sep 19, 2026	51-200	43 contacts →
	Indirect evidence “For more than 20 years, RSR has been supporting many great companies with office design, construction and maintenance projects, creating inspirational workplaces that motivate…” Source: RevenueBase Database · checked Sep 19, 2026
13	Headoffice3	Indirect evidence	Leeds, United KingdomHQ checked Sep 19, 2026	51-200	43 contacts →
	Indirect evidence “Welcome to headoffice3, specialists in complex and time-critical construction projects, and especially office-to-residential conversions.” Source: RevenueBase Database · checked Sep 19, 2026
14	CDS Wilman	Indirect evidence	Manchester, United KingdomHQ checked Sep 19, 2026	11-50	41 contacts →
	Indirect evidence “We are award-winning design and build specialists for restaurants, retail, hospitality, and workplaces, delivering projects from concept to completion for both back of house and…” Source: RevenueBase Database · checked Sep 19, 2026
15	MWA Projects	Indirect evidence	Henley-on-thames, United KingdomHQ checked Sep 19, 2026	11-50	41 contacts →
	Indirect evidence “We’re experts in workspace transformation for commercial offices and retail occupiers, with clients ranging from SMEs to international luxury brands.” Source: RevenueBase Database · checked Sep 19, 2026
16	Blue Jelly	Partial evidence	Windsor, United KingdomHQ checked Sep 19, 2026	11-50	39 contacts →
	Partial evidence “Blue Jelly is a full service provider of Design, Fit out and Furniture for tenants and landlords across the UK.” Source: RevenueBase Database · checked Sep 19, 2026
17	Artichoke	Indirect evidence	Cheddar, United KingdomHQ checked Sep 19, 2026	11-50	39 contacts →
	Indirect evidence “We are a company with strong values.” Source: RevenueBase Database · checked Sep 19, 2026
18	IFSE	Indirect evidence	Croydon, United KingdomHQ checked Sep 19, 2026	11-50	38 contacts →
	Indirect evidence “We’re your restaurant design, cafe design and commercial kitchen design experts.” Source: RevenueBase Database · checked Sep 19, 2026
19	RAP Interiors	Indirect evidence	Maidstone, United KingdomHQ checked Sep 19, 2026	11-50	37 contacts →
	Indirect evidence “Rap Interiors provide an award winning, complete solution for office refurbishments for business, commercial, public sector, Housing Associations, blue chip companies throughout…” Source: RevenueBase Database · checked Sep 19, 2026
20	BULB	Indirect evidence	Beech Hill, United KingdomHQ checked Sep 19, 2026	11-50	34 contacts →
	Indirect evidence “We are commercial interior fit-out specialists in office, laboratory and healthcare sectors.” Source: RevenueBase Database · checked Sep 19, 2026
21	Estilo Interiors	Partial evidence	Birmingham, United KingdomHQ checked Sep 19, 2026	11-50	34 contacts →
	Partial evidence “Estilo are a leading main contractor specialising in the design and build of commercial interior fit out and refurbishment.” Source: RevenueBase Database · checked Sep 19, 2026
22	Saracen Group	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	51-200	33 contacts →
	Indirect evidence “Saracen Group is one of the UK's most trusted office interiors specialists, offering a full range of services from space planning and design to fit out and facilities management.” Source: RevenueBase Database · checked Sep 19, 2026
23	Delcon Construction LTD	Indirect evidence	Victoria, United KingdomHQ checked Sep 19, 2026	11-50	31 contacts →
	Indirect evidence “Delcon Construction Limited specialise in the delivery of luxury retail, high end residential, restaurant and art gallery projects.” Source: RevenueBase Database · checked Sep 19, 2026
24	Virtus	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	11-50	31 contacts →
	Indirect evidence “We aim to bring our wealth of experience to the management of any construction or re-fit programme.” Source: RevenueBase Database · checked Sep 19, 2026
25	Mccarthys	Indirect evidence	Coventry, United KingdomHQ checked Sep 19, 2026	11-50	31 contacts →
	Indirect evidence “We are McCarthys, a family-run business delivering inspiring spaces since 1979.” 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: tenant improvement contractors. 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 tenant improvement contractors.
Partial evidence: Its own public description names part of tenant improvement contractors, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name tenant improvement contractors. 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 918 tenant improvement contractors based in the United Kingdom

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Tenant improvement contractors based in the United Kingdom at a glance

As of Sep 19, 2026

43.4%Verified-email coverage

5.6Average contacts per company

1-10Median size (employees)

24.8%Largest-city concentration · London

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

547

11-50

325

51-200

201-500

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 918 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 tenant improvement contractors, 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 “tenant improvement contractors”. 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 tenant improvement contractors), 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 tenant improvement contractors, 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, 2,247 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.

Tenant improvement contractors by metro

Tenant improvement contractors in London228

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 tenant improvement contractors, 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 tenant improvement contractors are there based in the United Kingdom?

RevenueBase identified 918 tenant improvement contractors 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?

Maris Interiors, headquartered in London, tops this list with the largest team on record.

Which city has the most tenant improvement contractors?

London leads with 228 headquartered companies, followed by Manchester (16) and Birmingham (14).

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 2,247 verified decision-maker contacts tracked across these 918 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.