Company lists · Data refreshed November 2026

Top 25 Passive design consultants based in the United Kingdom

RevenueBase identified 205 company matches for passive design consultants associated with the United Kingdom as of November 2026 and tracks 1,548 professional contacts across them, including 795 with verified work emails. London is the largest hub.

This list covers company matches for passive design consultants 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 November 6, 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 Nov 6, 2026 How this list was built
205Companies
1,548Contacts tracked
795Verified emails
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The 25 largest passive design consultants based in the United Kingdom

Ranked by team size
Top 25 of 205 company matches for passive design consultants based in the United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Nov 6, 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 matchLondon, United KingdomHQ recorded Nov 6, 202651-20066 contacts →

Exact match

“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.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
2Exact matchDoncaster, United KingdomHQ recorded Nov 6, 2026201-50066 contacts →

Exact match

“At 21 Degrees, we believe buildings should be designed for lower energy use, healthier spaces and better comfort.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
3Exact matchEdinburgh, United KingdomHQ recorded Nov 6, 202651-20063 contacts →

Exact match

“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…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
4Exact matchEdinburgh, United KingdomHQ recorded Nov 6, 202651-20060 contacts →

Exact match

“RSP Consulting Engineers LLP are leaders in sustainable and low energy building services design.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
5Exact matchLondon, United KingdomHQ recorded Nov 6, 202651-20046 contacts →

Exact match

“We are a team of like-minded individuals delivering a commercially designed building services solution; we pride ourselves on the quality of our product.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
6Exact matchOxfordshire, United KingdomHQ recorded Nov 6, 202651-20041 contacts →

Exact match

“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…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
7Exact matchLondon, United KingdomHQ recorded Nov 6, 202611-5035 contacts →

Exact match

“We’re helping to create a world where every building is truly zero carbon.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
8Exact matchBristol, United KingdomHQ recorded Nov 6, 202611-5035 contacts →

Exact match

“We believe that if you understand your environmental targets, you will have a better understanding of their real-world impacts.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
9Exact matchCaterham, United KingdomHQ recorded Nov 6, 202651-20033 contacts →

Exact match

“Our founder, Simon Flatt, started the practice in 2003 to provide sustainable engineering solutions of the highest quality and standard.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
10Exact matchBristol, United KingdomHQ recorded Nov 6, 202611-5030 contacts →

Exact match

“gcp is an employee-owned chartered architectural practice and energy consultancy based in Bristol.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
11Exact matchLondon, United KingdomHQ recorded Nov 6, 202611-5026 contacts →

Exact match

“DSA Engineering is an engineering design consultancy with extensive experience in providing innovative multi-disciplinary engineering services.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
12Exact matchSheffield, United KingdomHQ recorded Nov 6, 202611-5026 contacts →

Exact match

“Established in 1988 SDA are Sheffield’s longest-running independent Building Services Engineering Consultants.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
13Exact matchLondon, United KingdomHQ recorded Nov 6, 202611-5025 contacts →

Exact match

“Ackroyd Lowrie is a design-led, client focused practice.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
14Exact matchGloucester, United KingdomHQ recorded Nov 6, 202611-5023 contacts →

Exact match

“MBC Timber Frame UK Ltd was established in 2002 in Tipperary, Ireland and in 2011 we sold our first passive house in the UK, since then we have concentrated our efforts in the…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
15Exact matchLondon, United KingdomHQ recorded Nov 6, 202611-5023 contacts →

Exact match

“OR Consulting is an award winning environmental and low carbon building design consultancy.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
16Exact matchBingham, United KingdomHQ recorded Nov 6, 202611-5022 contacts →

Exact match

“We're certified Passivhaus architects and conservation specialists.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
17Exact matchNorwich, United KingdomHQ recorded Nov 6, 20261-1021 contacts →

Exact match

“We're Beattie, a design and technology company that delivers Passivhaus and net zero solutions for the built environment.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
18Exact matchStadhampton, United KingdomHQ recorded Nov 6, 202611-5020 contacts →

Exact match

“Vector Design has achieved a reputation for high quality and value in an ever competitive and technically challenging market place.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
19Exact matchBradford On Avon, United KingdomHQ recorded Nov 6, 202611-5020 contacts →

Exact match

“Greengauge are building services engineers and building physicists providing a wide range of services to designers of the built environment.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
20Exact matchBristol, United KingdomHQ recorded Nov 6, 202611-5019 contacts →

Exact match

“We are a team of passionate, high calibre building services design consultants who create technically excellent solutions for our clients’ projects.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
21Exact matchGalashiels, United KingdomHQ recorded Nov 6, 202611-5018 contacts →

Exact match

“CSY Architects deliver Architecture for homeowners, businesses, housing associations and community groups, from our three regional offices in the Lothians, Borders, and…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
22Exact matchGlasgow, United KingdomHQ recorded Nov 6, 20261-1018 contacts →

Exact match

“Design Me have a holistic, pro-active and innovative approach to low energy building services design, our expert understanding of building physics allows us to help design teams…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
23Exact matchFarnham, United KingdomHQ recorded Nov 6, 202611-5017 contacts →

Exact match

“We are independent building performance engineering specialists, working across the built environment to help architects, commercial developers, housebuilders and building owners…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
24Exact matchMilton Keynes, United KingdomHQ recorded Nov 6, 202611-5016 contacts →

Exact match

“Eco Design Consultants is an award-winning chartered architecture practice, specialise in Passivhaus both new build and retrofit.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
25Exact matchDurham, United KingdomHQ recorded Nov 6, 202611-5015 contacts →

Exact match

“Building Services Consulting Engineers and Sustainability Consultants”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase

Showing 25 of 205 passive design consultants based in the United Kingdom

See the full list, filter by size, metro and specialty, and access 795 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Passive design consultants based in the United Kingdom at a glance

As of Nov 6, 2026
51.4%Verified-email coverage
7.6Average contacts per company
1-10Median size (employees)
20.5%Largest-city concentration · London
Nov 6, 2026Page data refreshed

Companies by employee count

1-10
145
11-50
51
51-200
6
201-500
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 205 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 “passive design consultants” 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 795 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 November 6, 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.

Passive design consultants by metro

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 “passive design consultants”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many passive design consultants are there based in the United Kingdom?

RevenueBase identified 205 company matches for passive design consultants associated with the United Kingdom as of November 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?

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

Which city has the most passive design consultants?

London leads with 42 company records, followed by Bristol (7) and Manchester (7).

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 795 professional contacts with verified work emails tracked across these 205 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 November 6, 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.