Company lists · Data refreshed September 2026

Top 25 Commercial construction consulting firms based in Seattle, United States

RevenueBase identified 142 commercial construction consulting firms headquartered in Seattle, United States as of September 2026 and tracks 3,179 professional contacts across them, including 1,802 with verified work emails. Across the United States, New York is the largest hub for this category (887 companies); Seattle has 142.

This list covers commercial construction consulting firms headquartered in Seattle, 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
142Companies
3,179Contacts tracked
1,802Verified emails
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The 25 largest commercial construction consulting firms based in Seattle, United States

Ranked by team size
Top 25 of 142 commercial construction consulting firms based in Seattle, United States, ranked by team size, largest first. Data refreshed Sep 23, 2026. RevenueBase Smart Search rates how each company's information relates to commercial construction 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.
#CompanyRevenueBase Smart SearchHeadquartersEmployeesContacts
1Indirect evidenceSeattle, WA, United StatesHQ checked Sep 23, 2026501-1,000859 contacts →

Indirect evidence

“The right team is more than an advantage.”

Source: RevenueBase Database · checked Sep 23, 2026
2Strong evidenceSeattle, WA, United StatesHQ checked Sep 23, 2026501-1,000470 contacts →

Strong evidence

“Sellen Construction is a locally owned and operated commercial builder.”

Source: RevenueBase Database · checked Sep 23, 2026
3Partial evidenceSeattle, WA, United StatesHQ checked Sep 23, 2026201-500327 contacts →

Partial evidence

“Founded in 1983, Abbott Construction is a progressive West Coast construction group known for its superior management and field team, best-in-class standards and craftsmanship.”

Source: RevenueBase Database · checked Sep 23, 2026
4Partial evidenceSeattle, WA, United StatesHQ checked Sep 23, 202651-200178 contacts →

Partial evidence

“Harris Group is a multidiscipline engineering consulting firm with offices located throughout the United States.”

Source: RevenueBase Database · checked Sep 23, 2026
5Partial evidenceSeattle, WA, United StatesHQ checked Sep 23, 202651-200151 contacts →

Partial evidence

“Säzän Group is an engineering and consulting firm with offices in Washington, Oregon, and Arizona.”

Source: RevenueBase Database · checked Sep 23, 2026
6Strong evidenceSeattle, WA, United StatesHQ checked Sep 23, 202651-200109 contacts →

Strong evidence

“BHC Consultants, LLC (BHC) is an employee owned and managed consulting, engineering, building code and construction compliance, and planning firm with offices in Seattle and…”

Source: RevenueBase Database · checked Sep 23, 2026
7Indirect evidenceSeattle, WA, United StatesHQ checked Sep 23, 202651-20084 contacts →

Indirect evidence

“Seneca Group, a Cumming Group company, provides real estate development management and advisory services to private and public sector clients.”

Source: RevenueBase Database · checked Sep 23, 2026
8Strong evidenceSeattle, WA, United StatesHQ checked Sep 23, 202651-20076 contacts →

Strong evidence

“In 1988, DP Incorporated was founded to serve the construction requirements of the commercial real estate industry in the greater Puget Sound.”

Source: RevenueBase Database · checked Sep 23, 2026
9Partial evidenceSeattle, WA, United StatesHQ checked Sep 23, 202611-5065 contacts →

Partial evidence

“Andersen Bjornstad Kane Jacobs (ABKJ) is a premier consulting design firm in the United States.”

Source: RevenueBase Database · checked Sep 23, 2026
10Indirect evidenceSeattle, WA, United StatesHQ checked Sep 23, 202651-20061 contacts →

Indirect evidence

“Krekow Jennings is a diverse and uniquely talented team of builders primarily dedicated to crafting highly custom, architecturally significant residences.”

Source: RevenueBase Database · checked Sep 23, 2026
11Indirect evidenceSeattle, WA, United StatesHQ checked Sep 23, 202651-20054 contacts →

Indirect evidence

“W.G.”

Source: RevenueBase Database · checked Sep 23, 2026
12Indirect evidenceSeattle, WA, United StatesHQ checked Sep 23, 202651-20041 contacts →

Indirect evidence

“Marpac is a General Contractor based in Seattle, WA.”

Source: RevenueBase Database · checked Sep 23, 2026
13Indirect evidenceSeattle, WA, United StatesHQ checked Sep 23, 202611-5041 contacts →

Indirect evidence

“If you’ve got a vision, we can build it.”

Source: RevenueBase Database · checked Sep 23, 2026
14Strong evidenceSeattle, WA, United StatesHQ checked Sep 23, 202611-5037 contacts →

Strong evidence

“Sealaska Constructors is a full service construction management firm specializing in complex, highly sophisticated design and the construction of commercial and industrial…”

Source: RevenueBase Database · checked Sep 23, 2026
15Partial evidenceSeattle, WA, United StatesHQ checked Sep 23, 202611-5030 contacts →

Partial evidence

“Ecotope has provided sustainable building design consulting and engineering services in the Pacific Northwest for over 40 years.”

Source: RevenueBase Database · checked Sep 23, 2026
16Strong evidenceSeattle, WA, United StatesHQ checked Sep 23, 202611-5027 contacts →

Strong evidence

“Westlake Consulting Group provides trusted development and construction management consulting services along the West Coast.”

Source: RevenueBase Database · checked Sep 23, 2026
17Indirect evidenceSeattle, WA, United StatesHQ checked Sep 23, 202611-5025 contacts →

Indirect evidence

“TCA represents a 60+ year evolution of experience providing personalized design services for a wide range of challenging and notable projects.”

Source: RevenueBase Database · checked Sep 23, 2026
18Indirect evidenceSeattle, WA, United StatesHQ checked Sep 23, 202611-5019 contacts →

Indirect evidence

“Axiom Design Build is a Seattle based architectural firm and general contractor.”

Source: RevenueBase Database · checked Sep 23, 2026
19Partial evidenceSeattle, WA, United StatesHQ checked Sep 23, 202611-5019 contacts →

Partial evidence

“Modern Construction Services, LLC is a Certified Women’s Business Enterprise (WBE) and Certified Small Contractor and Supplier (SCS) providing services for a broad range of…”

Source: RevenueBase Database · checked Sep 23, 2026
20Partial evidenceSeattle, WA, United StatesHQ checked Sep 23, 202611-5016 contacts →

Partial evidence

“Integrated Design Engineers (idE) is a Seattle-based structural engineering consulting firm founded in 2005.”

Source: RevenueBase Database · checked Sep 23, 2026
21Partial evidenceSeattle, United StatesHQ checked Sep 23, 202611-5015 contacts →

Partial evidence

“We provide Fire protection consulting and design services throughout the U.S.”

Source: RevenueBase Database · checked Sep 23, 2026
22Partial evidenceSeattle, WA, United StatesHQ checked Sep 23, 20261-1012 contacts →

Partial evidence

“Arrive, LLC is a real estate consulting company providing development advisory services for apartment and condominium projects in the Pacific Northwest.”

Source: RevenueBase Database · checked Sep 23, 2026
23Partial evidenceSeattle, WA, United StatesHQ checked Sep 23, 20261-1012 contacts →

Partial evidence

“DCW Cost & Construction Management is an independent women-owned third-party consultancy offering a wide array of project management services with offices in Seattle, Washington…”

Source: RevenueBase Database · checked Sep 23, 2026
24Partial evidenceSeattle, WA, United StatesHQ checked Sep 23, 202611-5012 contacts →

Partial evidence

“Building Envelope Technology & Research (BET & R) is a professional roofing, waterproofing, and cladding consulting firm specializing in building envelope design for new and…”

Source: RevenueBase Database · checked Sep 23, 2026
25Partial evidenceSeattle, WA, United StatesHQ checked Sep 23, 202611-5012 contacts →

Partial evidence

“HAINLINE was founded in 1981 to assist owners, architects, and contractors in the construction process.”

Source: RevenueBase Database · checked Sep 23, 2026

Showing 25 of 142 commercial construction consulting firms based in Seattle, United States

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Commercial construction consulting firms based in Seattle, United States at a glance

As of Sep 23, 2026
56.7%Verified-email coverage
22.4Average contacts per company
1-10Median size (employees)
Sep 23, 2026Page data refreshed

Companies by employee count

1-10
85
11-50
43
51-200
10
201-500
2
501-1,000
2

Email recency for this list is measured across the whole United States list rather than for Seattle, so it is reported there. Company counts and contact totals on this page are exact for Seattle, over 142 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 commercial construction 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 Seattle, United States whose own description of what they do matches “commercial construction 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 commercial construction 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 commercial construction consulting firms, and records with no verified work email. Companies headquartered outside Seattle 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, 1,802 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.

Commercial construction consulting firms by metro in the United States

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 commercial construction 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 commercial construction consulting firms are there based in Seattle, United States?

RevenueBase identified 142 commercial construction consulting firms headquartered in Seattle, 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?

Coffman Engineers, headquartered in Seattle, tops this list with the largest team on record.

Which city in the United States has the most commercial construction consulting firms?

New York leads the United States with 887 headquartered companies, followed by Houston (480) and Miami (355). Seattle has 142.

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 1,802 verified decision-maker contacts tracked across these 142 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.