Company lists · Data refreshed September 2026

Top 25 Accessible building design consultants worldwide

Name: Accessible building design consultants worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 30, 2026 2,357 companies tracked

RevenueBase identified 2,357 accessible building design consultants worldwide as of September 2026 and tracks 14,198 professional contacts across them, including 4,738 with verified work emails. The United States is the largest market and London the largest hub.

This list covers accessible building design consultants worldwide, 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 30, 2026. Country and city lists for accessible building design consultants follow the table.

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 30, 2026 86% judged on-target in blind review

2,357Companies

14,198Contacts tracked

4,738Verified emails

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The 25 largest accessible building design consultants worldwide

Ranked by team size

Top 25 of 2,357 accessible building design consultants worldwide, ranked by team size, largest first. Data refreshed Sep 30, 2026. RevenueBase Smart Search rates how each company's information relates to accessible building design consultants: 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	BTP Consultants	Partial evidence	Montigny-le-bretonneux, FranceHQ checked Sep 30, 2026	201-500	1,066 contacts →
	Partial evidence “BTP Consultants est un bureau de ̂, et présent à l'échelle nationale depuis plus de.” Source: RevenueBase Database · checked Sep 30, 2026
2	Little Diversified Architectural Consulting	Indirect evidence	Little Global, VA, United StatesHQ checked Sep 30, 2026	201-500	509 contacts →
	Indirect evidence “At Little, we deliver results far beyond architecture-results you wouldn’t expect from an architectural firm.” Source: RevenueBase Database · checked Sep 30, 2026
3	Barrierbreak	Partial evidence	Mumbai, IndiaHQ checked Sep 30, 2026	201-500	307 contacts →
	Partial evidence “With 20+ years, BarrierBreak is a global leader in Digital Accessibility & a trusted partner to customers in US, Europe, UK, Australia and India.” Source: RevenueBase Database · checked Sep 30, 2026
4	Allyant	Indirect evidence	Ottawa, ON, CanadaHQ checked Sep 30, 2026	201-500	250 contacts →
	Indirect evidence “Providing equitable access to information can be overwhelming for organizations.” Source: RevenueBase Database · checked Sep 30, 2026
5	AEL Data Services LLP	Indirect evidence	Toronto, CanadaHQ checked Sep 30, 2026	501-1,000	206 contacts →
	Indirect evidence “With a staggering 1.3 billion individuals living with disabilities worldwide, a number nearly equivalent to the population of India, the imperative to prioritize digital…” Source: RevenueBase Database · checked Sep 30, 2026
6	IDS Group, INC	Indirect evidence	Irvine, CA, United StatesHQ checked Sep 30, 2026	51-200	205 contacts →
	Indirect evidence “IDS is an award-winning engineering and architectural firm offering multidisciplinary consulting services through our staff of 90 professionals.” Source: RevenueBase Database · checked Sep 30, 2026
7	Pioneer Engineering Consultancy LLC	Partial evidence	Abu Dhabi, United Arab EmiratesHQ checked Sep 30, 2026	501-1,000	199 contacts →
	Partial evidence “Pioneer Engineering Consultancy L.L.C.(PEC) is an ISO 9001:2008, ISO 14001 2004 and OHSAS 18001 2007 Certified architectural and engineering consultancy firm founded in 2002 in…” Source: RevenueBase Database · checked Sep 30, 2026
8	PEUTZ	Strong evidence	Mook, NetherlandsHQ checked Sep 30, 2026	201-500	197 contacts →
	Strong evidence “Peutz is a group of independent consultants specialised in a wide range of fields related to the design and building of any type of architectural or industrial development.” Source: RevenueBase Database · checked Sep 30, 2026
9	Steven Winter Associates	Partial evidence	Norwalk, CT, United StatesHQ checked Sep 30, 2026	51-200	142 contacts →
	Partial evidence “For over five decades, we’ve been at the forefront of transforming the built environment to be more energy efficient, accessible, healthy, and resilient.” Source: RevenueBase Database · checked Sep 30, 2026
10	Mckenzie Group Consulting	Indirect evidence	Melbourne, AustraliaHQ checked Sep 30, 2026	51-200	138 contacts →
	Indirect evidence “Backed by global leader Bureau Veritas, McKenzie Group Consulting is a team of 120+ talented, skilled and passionate professionals.” Source: RevenueBase Database · checked Sep 30, 2026
11	JOG Engenharia DE Andaimes	Indirect evidence	Porto Alegre, BrazilHQ checked Sep 30, 2026	201-500	128 contacts →
	Indirect evidence “A JOG Engenharia de Andaimes surgiu com o intuito de suprir uma necessidade latente do mercado, evoluindo e profissionalizando as soluções em acesso com segurança na construção…” Source: RevenueBase Database · checked Sep 30, 2026
12	Deque Systems - Apac	Indirect evidence	Hyderabad, IndiaHQ checked Sep 30, 2026	51-200	119 contacts →
	Indirect evidence “Deque has an office in Hyderabad, India, to cater to the APAC market.” Source: RevenueBase Database · checked Sep 30, 2026
13	CCI	Strong evidence	St. Louis, MO, United StatesHQ checked Sep 30, 2026	51-200	107 contacts →
	Strong evidence “Code Consultants, Inc.(CCI) is an engineering and consulting firm providing a diverse range of design and consultation services since 1973: Fire protection & life safety code…” Source: RevenueBase Database · checked Sep 30, 2026
14	Jensen Hughes Pacific	Strong evidence	Sydney, AustraliaHQ checked Sep 30, 2026	51-200	104 contacts →
	Strong evidence “At Jensen Hughes Pacific, we deliver industry leading services in building code compliance, fire and life safety, accessibility, sustainable design, and fire systems design.” Source: RevenueBase Database · checked Sep 30, 2026
15	Valida	Indirect evidence	Aiguaviva, SpainHQ checked Sep 30, 2026	51-200	91 contacts →
	Indirect evidence “Somos especialistas en dar soluciones de accesibilidad a personas con movilidad reducida, personas con discapacidad y a todas aquellas personas que deseen superar las barreras…” Source: RevenueBase Database · checked Sep 30, 2026
16	Tpgi, A Vispero Company	Strong evidence	Clearwater, FL, United StatesHQ checked Sep 30, 2026	51-200	90 contacts →
	Strong evidence “TPG Interactive (TPGi) is a world-class accessibility consultancy with a reputation for excellence.” Source: RevenueBase Database · checked Sep 30, 2026
17	Philip Chun Building Compliance	Strong evidence	Melbourne, AustraliaHQ checked Sep 30, 2026	51-200	86 contacts →
	Strong evidence “Australia's most trusted and comprehensive building code, essential services management and accessibility consultancy.” Source: RevenueBase Database · checked Sep 30, 2026
18	Ciao Technologies	Indirect evidence	Québec, QC, CanadaHQ checked Sep 30, 2026	51-200	83 contacts →
	Indirect evidence “The name says it all.” Source: RevenueBase Database · checked Sep 30, 2026
19	KMA	Strong evidence	Newton, MA, United StatesHQ checked Sep 30, 2026	11-50	78 contacts →
	Strong evidence “KMA is a design and consulting practice, working and thinking at the intersection of architecture and accessibility.” Source: RevenueBase Database · checked Sep 30, 2026
20	Accessable	Partial evidence	Stevenage, United KingdomHQ checked Sep 30, 2026	51-200	77 contacts →
	Partial evidence “AccessAble is the UK's largest provider of accessibility information.” Source: RevenueBase Database · checked Sep 30, 2026
21	LCM Architects	Partial evidence	Chicago, IL, United StatesHQ checked Sep 30, 2026	51-200	75 contacts →
	Partial evidence “Founded in 1996, LCM Architects is a 60-plus-person architecture firm and industry leader in ADA and FHA accessibility consulting that intentionally blends these specialties to…” Source: RevenueBase Database · checked Sep 30, 2026
22	Synergy Partners Consulting Limited	Partial evidence	Toronto, ON, CanadaHQ checked Sep 30, 2026	51-200	63 contacts →
	Partial evidence “Synergy Partners is a boutique consulting engineering firm focused on building planning and engineering.” Source: RevenueBase Database · checked Sep 30, 2026
23	Bisson Fortin	Partial evidence	Laval, QC, CanadaHQ checked Sep 30, 2026	51-200	60 contacts →
	Partial evidence “Bisson Fortin's strength is in its experienced team, capable of mastering a complex environment to create accessible and sustainable architecture on a human scale.” Source: RevenueBase Database · checked Sep 30, 2026
24	Kembhavi Architecture Foundation - India	Indirect evidence	IndiaHQ checked Sep 30, 2026	51-200	59 contacts →
	Indirect evidence “Kembhavi Architecture Foundation - India is an architecture & planning company based out of India.” Source: RevenueBase Database · checked Sep 30, 2026
25	Steve Watson & Partners	Partial evidence	Sydney, AustraliaHQ checked Sep 30, 2026	51-200	57 contacts →
	Partial evidence “Steve Watson & Partners is a well recognised and professional building code consulting and approvals service.” Source: RevenueBase Database · checked Sep 30, 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: accessible building design consultants. 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 accessible building design consultants.
Partial evidence: Its own public description names part of accessible building design consultants, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name accessible building design consultants. 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 2,357 accessible building design consultants worldwide

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Accessible building design consultants worldwide at a glance

As of Sep 30, 2026

33.4%Verified-email coverage

6.0Average contacts per company

1-10Median size (employees)

1.7%Largest-city concentration · London

Sep 30, 2026Page data refreshed

Companies by employee count

1-10

1,822

11-50

441

51-200

201-500

501-1,000

Email recency is reported on each country list linked below.

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 accessible building design consultants, 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.
Coverage: Every country. Country and city lists for accessible building design consultants are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “accessible building design consultants”. 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 accessible building design consultants), 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 accessible building design consultants, and records with no verified work email.
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, 4,738 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 30, 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.

Accessible building design consultants by location

13 lists · largest first

Every Accessible building design consultants list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.

Countries

Cities

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 accessible building design consultants, 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 accessible building design consultants are there worldwide?

RevenueBase identified 2,357 accessible building design consultants worldwide 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?

BTP Consultants, headquartered in Montigny-Le-Bretonneux, tops this list with the largest team on record.

Which country has the most accessible building design consultants?

The United States leads with 510 companies, followed by France (186) and the United Kingdom (180). Every accessible building design consultants list by country and city is linked on this page.

Which city has the most accessible building design consultants?

London leads with 41 headquartered companies, followed by Sao Paulo (40) and Toronto (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 4,738 verified decision-maker contacts tracked across these 2,357 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 30, 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.