Company lists · Data refreshed September 2026

Top 25 Net-zero building design firms based in the United Kingdom

Name: Net-zero building design 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 17, 2026 371 companies tracked

RevenueBase identified 371 net-zero building design firms headquartered in the United Kingdom as of September 2026 and tracks 3,672 professional contacts across them, including 1,895 with verified work emails. London is the largest hub.

This list covers net-zero building design 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 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

371Companies

3,672Contacts tracked

1,895Verified emails

Explore this list → Free signup · no credit card · 500 free credits

The 25 largest net-zero building design firms based in the United Kingdom

Ranked by team size

Top 25 of 371 net-zero building design firms 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 net-zero building design 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	CPW	Indirect evidence	Birmingham, United KingdomHQ checked Sep 17, 2026	201-500	317 contacts →
	Indirect evidence “Climate change is without a doubt the greatest challenge we face in these times.” Source: RevenueBase Database · checked Sep 17, 2026
2	MAX Fordham LLP	Partial evidence	London, United KingdomHQ checked Sep 17, 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 17, 2026
3	Zenergi	Strong evidence	Chilworth, United KingdomHQ checked Sep 17, 2026	51-200	157 contacts →
	Strong evidence “Zenergi supports and empowers your journey to net zero.” Source: RevenueBase Database · checked Sep 17, 2026
4	Howells	Partial evidence	Birmingham, United KingdomHQ checked Sep 17, 2026	51-200	123 contacts →
	Partial evidence “We’re an ambitious group of architects, designers and makers working throughout the UK and internationally.” Source: RevenueBase Database · checked Sep 17, 2026
5	Bennetts Associates	Partial evidence	London, United KingdomHQ checked Sep 17, 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 17, 2026
6	Planet Mark	Strong evidence	London, United KingdomHQ checked Sep 17, 2026	51-200	69 contacts →
	Strong evidence “Planet Mark is a sustainability certification and net zero provider for organisations and the built environment.” Source: RevenueBase Database · checked Sep 17, 2026
7	ECD Architects LTD	Strong evidence	London, United KingdomHQ checked Sep 17, 2026	51-200	64 contacts →
	Strong evidence “We are an award-winning architectural practice specialising in the design of low energy, low environmental impact buildings, cost effectively and to the highest quality standards.” Source: RevenueBase Database · checked Sep 17, 2026
8	RYBKA	Partial evidence	Edinburgh, United KingdomHQ checked Sep 17, 2026	51-200	61 contacts →
	Partial evidence “Rybka is a leading Building Services Engineering, Low Carbon and Sustainability Consultancy with a wide geographical spread and a focus on providing commercially viable, energy…” Source: RevenueBase Database · checked Sep 17, 2026
9	RSP Consulting Engineers	Strong evidence	Edinburgh, United KingdomHQ checked Sep 17, 2026	51-200	60 contacts →
	Strong evidence “RSP Consulting Engineers LLP are leaders in sustainable and low energy building services design.” Source: RevenueBase Database · checked Sep 17, 2026
10	ETUDE	Partial evidence	London, United KingdomHQ checked Sep 17, 2026	11-50	47 contacts →
	Partial evidence “We are a team of sustainability engineers passionate about creating buildings with a positive impact on the environment and the community.” Source: RevenueBase Database · checked Sep 17, 2026
11	MTT Limited	Strong evidence	London, United KingdomHQ checked Sep 17, 2026	51-200	45 contacts →
	Strong evidence “We are a team of like-minded individuals delivering a commercially designed building services solution; we pride ourselves on the quality of our product.” Source: RevenueBase Database · checked Sep 17, 2026
12	BE Design	Partial evidence	Newark, United KingdomHQ checked Sep 17, 2026	11-50	42 contacts →
	Partial evidence “BE Design was founded in 2013 with a passion to offer truly multi-disciplinary expertise and sustainable design excellence within the built environment.” Source: RevenueBase Database · checked Sep 17, 2026
13	Space Architects	Strong evidence	Newcastle Upon Tyne, United KingdomHQ checked Sep 17, 2026	51-200	41 contacts →
	Strong evidence “SPACE is a team of architects, designers and technologists who specialise in the creative reuse of buildings, design optimisation and circular decarbonisation.” Source: RevenueBase Database · checked Sep 17, 2026
14	Quattro Design Architects LTD	Partial evidence	Gloucester, United KingdomHQ checked Sep 17, 2026	51-200	39 contacts →
	Partial evidence “Quattro Design Architects is a leading Sustainable Architectural practice with offices in Gloucester, London and Cardiff.” Source: RevenueBase Database · checked Sep 17, 2026
15	Syzygy	Indirect evidence	London, United KingdomHQ checked Sep 17, 2026	11-50	35 contacts →
	Indirect evidence “Founded in 2010, Syzygy is the leading specialist low carbon technology consultancy for the real estate sector.” Source: RevenueBase Database · checked Sep 17, 2026
16	Etch Associates	Indirect evidence	Oxfordshire, United KingdomHQ checked Sep 17, 2026	51-200	34 contacts →
	Indirect evidence “etch Associates are an innovative and collaborative practice formed by David Behan, Richard Turner and David Harris, with 60 years combined experience within the construction…” Source: RevenueBase Database · checked Sep 17, 2026
17	Anderson Bell Christie	Strong evidence	Glasgow, United KingdomHQ checked Sep 17, 2026	11-50	34 contacts →
	Strong evidence “We provide a full range of architectural and design services, offering net zero carbon designs on all projects from large-scale masterplanning through to individual building…” Source: RevenueBase Database · checked Sep 17, 2026
18	Envision	Strong evidence	London, United KingdomHQ checked Sep 17, 2026	11-50	34 contacts →
	Strong evidence “Envision is a specialist sustainability, energy and net zero design consultancy offering strategic and technical advice within the built environment and to businesses wishing to…” Source: RevenueBase Database · checked Sep 17, 2026
19	Integration	Strong evidence	London, United KingdomHQ checked Sep 17, 2026	11-50	34 contacts →
	Strong evidence “We’re helping to create a world where every building is truly zero carbon.” Source: RevenueBase Database · checked Sep 17, 2026
20	SCS Sustainable Construction Services	Indirect evidence	Bristol, United KingdomHQ checked Sep 17, 2026	11-50	31 contacts →
	Indirect evidence “We believe that if you understand your environmental targets, you will have a better understanding of their real-world impacts.” Source: RevenueBase Database · checked Sep 17, 2026
21	FLATT	Indirect evidence	Caterham, United KingdomHQ checked Sep 17, 2026	51-200	26 contacts →
	Indirect evidence “Our founder, Simon Flatt, started the practice in 2003 to provide sustainable engineering solutions of the highest quality and standard.” Source: RevenueBase Database · checked Sep 17, 2026
22	GCP Chartered Architects	Indirect evidence	Bristol, United KingdomHQ checked Sep 17, 2026	11-50	25 contacts →
	Indirect evidence “gcp is an employee-owned chartered architectural practice and energy consultancy based in Bristol.” Source: RevenueBase Database · checked Sep 17, 2026
23	Marek Wojciechowski Architects LTD	Indirect evidence	London, United KingdomHQ checked Sep 17, 2026	11-50	24 contacts →
	Indirect evidence “Since our inception in 2004, Marek Wojciechowski Architects have been driven by the pursuit of quality - a belief that our surroundings directly influence the quality of our lives.” Source: RevenueBase Database · checked Sep 17, 2026
24	Elevate	Indirect evidence	London, United KingdomHQ checked Sep 17, 2026	11-50	24 contacts →
	Indirect evidence “Elevate is a leading engineering consultancy transforming urban infrastructure to revolutionise energy production and consumption.” Source: RevenueBase Database · checked Sep 17, 2026
25	Waugh Thistleton Architects	Partial evidence	London, United KingdomHQ checked Sep 17, 2026	11-50	23 contacts →
	Partial evidence “Waugh Thistleton Architects are a London based architectural practice working internationally to produce thoughtful and sustainable low carbon buildings.” 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: net-zero building design 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 net-zero building design firms.
Partial evidence: Its own public description names part of net-zero building design firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name net-zero building design 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 371 net-zero building design firms based in the United Kingdom

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 1,895 reachable decision-makers.

Free signup · no credit card

View the full list →

Net-zero building design firms based in the United Kingdom at a glance

As of Sep 17, 2026

51.6%Verified-email coverage

9.9Average contacts per company

1-10Median size (employees)

26.4%Largest-city concentration · London

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

261

11-50

51-200

201-500

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 371 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 net-zero building design 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 “net-zero building design 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 net-zero building design 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 net-zero building design 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, 1,895 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.

Net-zero building design firms by metro

Net-zero building design firms in London98

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 net-zero building design 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 net-zero building design firms are there based in the United Kingdom?

RevenueBase identified 371 net-zero building design 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?

CPW, headquartered in Solihull Birmingham, tops this list with the largest team on record.

Which city has the most net-zero building design firms?

London leads with 98 headquartered companies, followed by Bristol (11) 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 1,895 verified decision-maker contacts tracked across these 371 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.

Ready to reach these companies? Verified emails and direct dials for all 371 net-zero building design firms based in the United Kingdom. Start with a free account, no credit card.

Download this list →

Related lists

Net-zero building design firms by geography

Browse the directory

Browse: Companies home · All United Kingdom lists · All Net-zero building design firms lists · New lists

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.