Company lists · Data refreshed September 2026

Top 25 Sustainable architecture firms based in the United Kingdom

Name: Sustainable architecture 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 18, 2026 1,455 companies tracked

RevenueBase identified 1,455 sustainable architecture firms headquartered in the United Kingdom as of September 2026 and tracks 16,224 professional contacts across them, including 8,509 with verified work emails. London is the largest hub.

This list covers sustainable architecture 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 18, 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 18, 2026 86% judged on-target in blind review

1,455Companies

16,224Contacts tracked

8,509Verified emails

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The 25 largest sustainable architecture firms based in the United Kingdom

Ranked by team size

Top 25 of 1,455 sustainable architecture firms based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 18, 2026. RevenueBase Smart Search rates how each company's information relates to sustainable architecture 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	Foster Partners	Strong evidence	London, United KingdomHQ checked Sep 18, 2026	1,001-5,000	2,869 contacts →
	Strong evidence “Foster + Partners is a global studio for architecture, urbanism and design, all rooted in sustainability and founded by Norman Foster in 1967.” Source: RevenueBase Database · checked Sep 18, 2026
2	Grimshaw	Indirect evidence	London, United KingdomHQ checked Sep 18, 2026	501-1,000	550 contacts →
	Indirect evidence “Grimshaw is a place of ideas and invention, driven by a desire to connect people to each other and the world around us.” Source: RevenueBase Database · checked Sep 18, 2026
3	Sheppard Robson	Indirect evidence	London, United KingdomHQ checked Sep 18, 2026	201-500	391 contacts →
	Indirect evidence “Sheppard Robson is an ever-evolving collective of architects, interior designers and masterplanners.” Source: RevenueBase Database · checked Sep 18, 2026
4	Atelier TEN	Partial evidence	London, United KingdomHQ checked Sep 18, 2026	51-200	323 contacts →
	Partial evidence “As environmental design consultants, building services engineers and lighting designers, we are committed to high performance and sustainable design within the built environment.” Source: RevenueBase Database · checked Sep 18, 2026
5	Hawkins Brown	Indirect evidence	London, United KingdomHQ checked Sep 18, 2026	201-500	248 contacts →
	Indirect evidence “We are an internationally-renowned practice of over 200 award-winning architects, interior designers, urban designers and researchers.” Source: RevenueBase Database · checked Sep 18, 2026
6	HTA Design	Indirect evidence	London, United KingdomHQ checked Sep 18, 2026	201-500	243 contacts →
	Indirect evidence “HTA are a practice of more than 200 people, bringing together the creative talents of architects, urbanists, planners, landscape architects, interior designers, engagement and…” Source: RevenueBase Database · checked Sep 18, 2026
7	MAX Fordham LLP	Partial evidence	London, United KingdomHQ checked Sep 18, 2026	201-500	208 contacts →
	Partial evidence “Max Fordham LLP is a partnership of engineers, designers and consultants, working with the built environment, to deliver a sustainable future and a thriving planet.” Source: RevenueBase Database · checked Sep 18, 2026
8	ADP Architecture	Indirect evidence	London, United KingdomHQ checked Sep 18, 2026	51-200	158 contacts →
	Indirect evidence “ADP designs for a better every day.” Source: RevenueBase Database · checked Sep 18, 2026
9	Feilden Clegg Bradley Studios Fcbstudios	Partial evidence	Bath, United KingdomHQ checked Sep 18, 2026	51-200	144 contacts →
	Partial evidence “FCBStudios was founded to move architecture forward.” Source: RevenueBase Database · checked Sep 18, 2026
10	Genuit Group	Partial evidence	Leeds, United KingdomHQ checked Sep 18, 2026	1,001-5,000	133 contacts →
	Partial evidence “At Genuit Group, we’re driven by a clear purpose: to create a more sustainable built environment and a more resilient future for people and the planet.” Source: RevenueBase Database · checked Sep 18, 2026
11	Squire & Partners	Partial evidence	Brixton, United KingdomHQ checked Sep 18, 2026	51-200	124 contacts →
	Partial evidence “We are an international architecture and interior design studio with a reputation for using storytelling to produce beautifully crafted design.” Source: RevenueBase Database · checked Sep 18, 2026
12	Howells	Indirect evidence	Birmingham, United KingdomHQ checked Sep 18, 2026	51-200	123 contacts →
	Indirect evidence “We’re an ambitious group of architects, designers and makers working throughout the UK and internationally.” Source: RevenueBase Database · checked Sep 18, 2026
13	Simpsonhaugh	Indirect evidence	Manchester, United KingdomHQ checked Sep 18, 2026	51-200	107 contacts →
	Indirect evidence “Our passion for responsible, uplifting and beautiful design has informed our approach since 1987, when Rachel Haugh and Ian Simpson were united by a shared belief that innovative…” Source: RevenueBase Database · checked Sep 18, 2026
14	AEW Architects	Partial evidence	Manchester, United KingdomHQ checked Sep 18, 2026	51-200	105 contacts →
	Partial evidence “With a 30-year track record, we’ve been a guiding force behind architectural excellence and associated services across our specialist sectors.” Source: RevenueBase Database · checked Sep 18, 2026
15	Kettle Collective	Indirect evidence	Edinburgh, United KingdomHQ checked Sep 18, 2026	51-200	104 contacts →
	Indirect evidence “Kettle Collective is a multi-award-winning international practice, founded in 2012 by Tony Kettle and Colin Bone.” Source: RevenueBase Database · checked Sep 18, 2026
16	Jestico Whiles	Partial evidence	London, United KingdomHQ checked Sep 18, 2026	51-200	92 contacts →
	Partial evidence “Jestico + Whiles is an award-winning international architecture and interior design practice based in Clerkenwell, London.” Source: RevenueBase Database · checked Sep 18, 2026
17	Haworth Tompkins	Indirect evidence	London, United KingdomHQ checked Sep 18, 2026	51-200	91 contacts →
	Indirect evidence “Haworth Tompkins was formed in 1991 by architects Graham Haworth and Steve Tompkins.” Source: RevenueBase Database · checked Sep 18, 2026
18	Associated Architects	Indirect evidence	Birmingham, United KingdomHQ checked Sep 18, 2026	51-200	91 contacts →
	Indirect evidence “Associated Architects was founded in Birmingham in 1968.” Source: RevenueBase Database · checked Sep 18, 2026
19	Services Design Solution SDS	Partial evidence	South West, United KingdomHQ checked Sep 18, 2026	51-200	87 contacts →
	Partial 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 18, 2026
20	DLA Architecture	Partial evidence	Leeds, United KingdomHQ checked Sep 18, 2026	51-200	85 contacts →
	Partial evidence “Recently recognised as Architectural Practice of the Year and ranked on the AJ100, we have studios in Leeds, London, and Manchester, and are a multi-award-winning practice that…” Source: RevenueBase Database · checked Sep 18, 2026
21	John Robertson Architects	Partial evidence	London, United KingdomHQ checked Sep 18, 2026	51-200	73 contacts →
	Partial evidence “JRA is a forward-thinking and dynamic architectural practice, built on firm foundations with a commitment to people, place, and planet.” Source: RevenueBase Database · checked Sep 18, 2026
22	Bennetts Associates	Partial evidence	London, United KingdomHQ checked Sep 18, 2026	51-200	72 contacts →
	Partial evidence “Bennetts Associates is one of the UK’s leading architectural practices, recognised for creating elegant, human-centred buildings through an ethos of doing ‘More With Less’.” Source: RevenueBase Database · checked Sep 18, 2026
23	Architype	Partial evidence	London, United KingdomHQ checked Sep 18, 2026	51-200	70 contacts →
	Partial evidence “Architype Ltd is an architectural practice working from offices in Hereford, London and Edinburgh.” Source: RevenueBase Database · checked Sep 18, 2026
24	ECE Architecture	Partial evidence	Worthing, United KingdomHQ checked Sep 18, 2026	51-200	69 contacts →
	Partial evidence “ECE Architecture is an award-winning practice dedicated to the successful design and delivery of buildings which exceed expectations in the widest sense.” Source: RevenueBase Database · checked Sep 18, 2026
25	Falconer Chester Hall	Indirect evidence	Liverpool, United KingdomHQ checked Sep 18, 2026	51-200	68 contacts →
	Indirect evidence “We are an 'Architects Journal UK National Top 100 company'(AJ100) based in London, Liverpool, Manchester.” Source: RevenueBase Database · checked Sep 18, 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: sustainable architecture 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 sustainable architecture firms.
Partial evidence: Its own public description names part of sustainable architecture firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name sustainable architecture 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 1,455 sustainable architecture firms based in the United Kingdom

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Sustainable architecture firms based in the United Kingdom at a glance

As of Sep 18, 2026

52.4%Verified-email coverage

11.2Average contacts per company

1-10Median size (employees)

29.5%Largest-city concentration · London

Sep 18, 2026Page data refreshed

Companies by employee count

1-10

1,036

11-50

333

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 1,455 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 sustainable architecture 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 “sustainable architecture 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 sustainable architecture 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 sustainable architecture 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, 8,509 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 18, 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.

Sustainable architecture firms 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 sustainable architecture 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 sustainable architecture firms are there based in the United Kingdom?

RevenueBase identified 1,455 sustainable architecture 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?

Foster Partners, headquartered in London, tops this list with the largest team on record.

Which city has the most sustainable architecture firms?

London leads with 429 headquartered companies, followed by Manchester (33) and Bristol (31).

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 8,509 verified decision-maker contacts tracked across these 1,455 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 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 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.