Company lists · Data refreshed September 2026

Top 25 Building consulting firms based in the United States

Name: Building consulting firms based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 23, 2026 14,430 companies tracked

RevenueBase identified 14,430 building consulting firms headquartered in the United States as of September 2026 and tracks 404,182 professional contacts across them, including 184,205 with verified work emails and 155,835 with mobile numbers. New York is the largest hub.

This list covers building consulting firms headquartered in the United States, 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 23, 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 23, 2026 86% judged on-target in blind review

14,430Companies

404,182Contacts tracked

184,205Verified emails

155,835Mobile numbers

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The 25 largest building consulting firms based in the United States

Ranked by team size

Top 25 of 14,430 building consulting firms based in the United States, ranked by team size, largest first. Data refreshed Sep 23, 2026. RevenueBase Smart Search rates how each company's information relates to building consulting 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	AECOM	Indirect evidence	Dallas, TX, United StatesHQ checked Sep 23, 2026	10001+	63,914 contacts →
	Indirect evidence “AECOM is the global infrastructure leader, committed to delivering a better world.” Source: RevenueBase Database · checked Sep 23, 2026
2	Kimley-Horn	Partial evidence	Raleigh, NC, United StatesHQ checked Sep 23, 2026	5,001-10,000	10,117 contacts →
	Partial evidence “Kimley-Horn is one of the nation’s premier planning and design consulting firms.” Source: RevenueBase Database · checked Sep 23, 2026
3	WSP In The U.S	Indirect evidence	New York, NY, United StatesHQ checked Sep 23, 2026	10001+	9,318 contacts →
	Indirect evidence “What if you could shape built and natural environments – and the future of those that use them?” Source: RevenueBase Database · checked Sep 23, 2026
4	TRC Companies, INC	Indirect evidence	Windsor, CT, United StatesHQ checked Sep 23, 2026	5,001-10,000	7,017 contacts →
	Indirect evidence “TRC, a member of WSP, stands for adaptability.” Source: RevenueBase Database · checked Sep 23, 2026
5	Hill International, INC	Indirect evidence	Mount Laurel, NJ, United StatesHQ checked Sep 23, 2026	1,001-5,000	6,653 contacts →
	Indirect evidence “Hill International provides program, project, and construction management services for clients in a range of sectors undertaking major construction projects across the world.” Source: RevenueBase Database · checked Sep 23, 2026
6	The Whiting-Turner Contracting Company	Indirect evidence	Towson, MD, United StatesHQ checked Sep 23, 2026	1,001-5,000	5,734 contacts →
	Indirect evidence “How fortunate we all are to work in an industry that produces such a tangible work product that affects so many profoundly.” Source: RevenueBase Database · checked Sep 23, 2026
7	Hensel Phelps	Indirect evidence	Greeley, CO, United StatesHQ checked Sep 23, 2026	5,001-10,000	4,094 contacts →
	Indirect evidence “As an employee-owned company, Hensel Phelps culture is based on dedication and commitment to delivering EXCELLENCE for our clients and employees.” Source: RevenueBase Database · checked Sep 23, 2026
8	Gilbane Building	Strong evidence	Providence, RI, United StatesHQ checked Sep 23, 2026	1,001-5,000	4,084 contacts →
	Strong evidence “Gilbane Building Company provides a full slate of construction and facilities-related services-from preconstruction services planning and integrated consulting capabilities to…” Source: RevenueBase Database · checked Sep 23, 2026
9	Balfour Beatty US	Indirect evidence	Dallas, TX, United StatesHQ checked Sep 23, 2026	1,001-5,000	3,578 contacts →
	Indirect evidence “Balfour Beatty US is an industry-leading provider of general contracting, at-risk construction management and design-build services for public and private sector clients across…” Source: RevenueBase Database · checked Sep 23, 2026
10	BL Harbert International LLC	Indirect evidence	Birmingham, AL, United StatesHQ checked Sep 23, 2026	5,001-10,000	2,818 contacts →
	Indirect evidence “BL Harbert International, LLC began construction operations in under the leadership of Billy Harbert, Jr, carrying on a family tradition in the construction industry dating back…” Source: RevenueBase Database · checked Sep 23, 2026
11	Dewberry	Indirect evidence	Fairfax, VA, United StatesHQ checked Sep 23, 2026	1,001-5,000	2,795 contacts →
	Indirect evidence “Dewberry is a leading, market-facing firm with a proven history of providing professional services to a wide variety of public- and private-sector clients.” Source: RevenueBase Database · checked Sep 23, 2026
12	The Haskell Company	Partial evidence	Jacksonville, FL, United StatesHQ checked Sep 23, 2026	1,001-5,000	2,213 contacts →
	Partial evidence “Haskell delivers over $3 billion annually in Architecture, Engineering, Construction (AEC) and Consulting solutions to assure certainty of outcome for complex capital projects…” Source: RevenueBase Database · checked Sep 23, 2026
13	Colliers Engineering & Design	Partial evidence	Holmdel, NJ, United StatesHQ checked Sep 23, 2026	1,001-5,000	2,049 contacts →
	Partial evidence “Colliers Engineering & Design, an affiliate of Colliers, is a trusted provider of multi-discipline engineering and architecture, design and consulting services to public and…” Source: RevenueBase Database · checked Sep 23, 2026
14	Consigli Construction Co., INC	Indirect evidence	Milford, MA, United StatesHQ checked Sep 23, 2026	1,001-5,000	2,010 contacts →
	Indirect evidence “Consigli Construction Co, Inc.” Source: RevenueBase Database · checked Sep 23, 2026
15	IMEG	Indirect evidence	Rock Island, IL, United StatesHQ checked Sep 23, 2026	1,001-5,000	1,985 contacts →
	Indirect evidence “Leaders in Engineering and Innovation.” Source: RevenueBase Database · checked Sep 23, 2026
16	LJA	Indirect evidence	Houston, TX, United StatesHQ checked Sep 23, 2026	1,001-5,000	1,932 contacts →
	Indirect evidence “Employee-Owned.” Source: RevenueBase Database · checked Sep 23, 2026
17	Layton Construction	Indirect evidence	Sandy, UT, United StatesHQ checked Sep 23, 2026	1,001-5,000	1,826 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 23, 2026
18	Clayco	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 23, 2026	1,001-5,000	1,720 contacts →
	Indirect evidence “Clayco is a full-service, turnkey real estate development, master planning, architecture, engineering, and construction firm that safely delivers clients across North America the…” Source: RevenueBase Database · checked Sep 23, 2026
19	JMT	Partial evidence	Serving Clients Across The Us, MD, United StatesHQ checked Sep 23, 2026	1,001-5,000	1,688 contacts →
	Partial evidence “Johnson, Mirmiran & Thompson is an employee owned, multi-disciplined firm offering a full array of planning, design, and construction phase consulting services for infrastructure…” Source: RevenueBase Database · checked Sep 23, 2026
20	Bowman Consulting	Indirect evidence	Reston, VA, United StatesHQ checked Sep 23, 2026	1,001-5,000	1,666 contacts →
	Indirect evidence “Headquartered in Reston, Virginia, Bowman is a national engineering services firm delivering infrastructure solutions to customers who own, develop and maintain the built…” Source: RevenueBase Database · checked Sep 23, 2026
21	Rk&k	Indirect evidence	Baltimore, MD, United StatesHQ checked Sep 23, 2026	1,001-5,000	1,641 contacts →
	Indirect evidence “RK & K is a full-service planning, engineering, environmental, and construction management/inspection firm serving a wide range of clients throughout the United States.” Source: RevenueBase Database · checked Sep 23, 2026
22	CHA Consulting, INC	Partial evidence	Albany, NY, United StatesHQ checked Sep 23, 2026	1,001-5,000	1,639 contacts →
	Partial evidence “CHA Consulting, Inc.(CHA) is an innovative, full-service engineering, design, consulting, and program/construction management firm providing a wide range of technology-enhanced…” Source: RevenueBase Database · checked Sep 23, 2026
23	GEI Consultants, INC	Indirect evidence	Woburn, MA, United StatesHQ checked Sep 23, 2026	1,001-5,000	1,604 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 23, 2026
24	UES	Indirect evidence	Orlando, FL, United StatesHQ checked Sep 23, 2026	1,001-5,000	1,595 contacts →
	Indirect evidence “UES provides professional engineering, environmental, testing and inspection services to clients across the United States.” Source: RevenueBase Database · checked Sep 23, 2026
25	BW Design Group	Indirect evidence	St Louis, MO, United StatesHQ checked Sep 23, 2026	1,001-5,000	1,555 contacts →
	Indirect evidence “BW Design Group is the only independent, fully integrated AEC firm powered by a Manufacturer's Mindset™.” Source: RevenueBase Database · checked Sep 23, 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: building consulting 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 building consulting firms.
Partial evidence: Its own public description names part of building consulting firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name building consulting 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 14,430 building consulting firms based in the United States

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Building consulting firms based in the United States at a glance

As of Sep 23, 2026

45.6%Verified-email coverage

38.6%Mobile-number coverage

28.0Average contacts per company

1-10Median size (employees)

4.0%Largest-city concentration · New York

Sep 23, 2026Page data refreshed

Companies by employee count

1-10

7,851

11-50

4,874

51-200

1,266

201-500

249

501-1,000

1,001-5,000

5,001-10,000

10001+

Freshness & accuracy

How recently the business emails were verified and the company information checked

Email last verified

Median 25.5d

139,1410–30

40,80231–60

2,77761–90

13190–180

1,354180+

Company record updated

Median 86.0d

00–30

117,42931–60

184,44161–90

79,98890–180

22,324180+

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 building consulting 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 States whose own description of what they do matches “building consulting 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 building consulting 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 building consulting firms, and records with no verified work email. Companies headquartered outside United States 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, 184,205 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 23, 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.

Building consulting 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 building consulting 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 building consulting firms are there based in the United States?

RevenueBase identified 14,430 building consulting firms headquartered in the United States 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?

AECOM, headquartered in Dallas, tops this list with the largest team on record.

Which city has the most building consulting firms?

New York leads with 579 headquartered companies, followed by Houston (299) and Chicago (211).

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 184,205 verified decision-maker contacts tracked across these 14,430 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 23, 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.