Company lists · Data refreshed September 2026

Top 25 Green building consulting firms based in Seattle, United States

Name: Green building consulting firms based in Seattle, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 66 companies tracked

RevenueBase identified 66 green building consulting firms headquartered in Seattle, United States as of September 2026 and tracks 4,009 professional contacts across them, including 2,730 with verified work emails. Across the United States, New York is the largest hub for this category (261 companies); Seattle has 66.

This list covers green building 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 28, 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 28, 2026 86% judged on-target in blind review

66Companies

4,009Contacts tracked

2,730Verified emails

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The 25 largest green building consulting firms based in Seattle, United States

Ranked by team size

Top 25 of 66 green building consulting firms based in Seattle, United States, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to green 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	Mckinstry	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 28, 2026	1,001-5,000	2,213 contacts →
	Indirect evidence “We're a national construction and energy services company dedicated to innovating the waste and climate harm out of the built environment.” Source: RevenueBase Database · checked Sep 28, 2026
2	Parametrix	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 28, 2026	501-1,000	880 contacts →
	Indirect evidence “At Parametrix, we help our clients imagine what's possible.” Source: RevenueBase Database · checked Sep 28, 2026
3	Säzän Group INC	Partial evidence	Seattle, WA, United StatesHQ checked Sep 28, 2026	51-200	151 contacts →
	Partial evidence “Säzän Group is an engineering and consulting firm with offices in Washington, Oregon, and Arizona.” Source: RevenueBase Database · checked Sep 28, 2026
4	Cascadia Consulting Group	Partial evidence	Seattle, WA, United StatesHQ checked Sep 28, 2026	51-200	110 contacts →
	Partial evidence “Cascadia Consulting Group is a majority women-owned consulting firm specializing in environmental and sustainability solutions.” Source: RevenueBase Database · checked Sep 28, 2026
5	Floyd Snider	Partial evidence	Seattle, WA, United StatesHQ checked Sep 28, 2026	11-50	48 contacts →
	Partial evidence “Floyd\|Snider is a multi-disciplinary environmental consulting firm providing engineering, strategic project management, and scientific expertise to achieve balanced solutions to…” Source: RevenueBase Database · checked Sep 28, 2026
6	Soundearth Strategies, INC	Partial evidence	Seattle, WA, United StatesHQ checked Sep 28, 2026	11-50	33 contacts →
	Partial evidence “SoundEarth is a 100% employee-owned environmental consulting firm with more than 40 dedicated and talented professionals working together to improve the environment in which we…” Source: RevenueBase Database · checked Sep 28, 2026
7	Ecotope, INC	Strong evidence	Seattle, WA, United StatesHQ checked Sep 28, 2026	11-50	30 contacts →
	Strong evidence “Ecotope has provided sustainable building design consulting and engineering services in the Pacific Northwest for over 40 years.” Source: RevenueBase Database · checked Sep 28, 2026
8	Runberg Architecture Group	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 28, 2026	11-50	25 contacts →
	Indirect evidence “Since our founding in 1998, Runberg Architecture Group has earned a name for thoughtful design that balances the unique social, economic and environmental interests of each…” Source: RevenueBase Database · checked Sep 28, 2026
9	4ea Building Science	Partial evidence	Seattle, WA, United StatesHQ checked Sep 28, 2026	11-50	22 contacts →
	Partial evidence “4EA Building Science is a full-service design consultancy that specializes in the design, construction, and rehabilitation of building enclosures.” Source: RevenueBase Database · checked Sep 28, 2026
10	Delta E Consulting	Partial evidence	Seattle, WA, United StatesHQ checked Sep 28, 2026	11-50	22 contacts →
	Partial evidence “At Delta E, we specialize in a diverse range of consulting services, including Sustainability, Carbon consulting, Energy services, and design expertise in Mechanical, Electrical…” Source: RevenueBase Database · checked Sep 28, 2026
11	O'brien360	Partial evidence	Seattle, WA, United StatesHQ checked Sep 28, 2026	11-50	21 contacts →
	Partial evidence “O'Brien360 is a nationally recognized leader in the sustainable building community.” Source: RevenueBase Database · checked Sep 28, 2026
12	NRG Fire Consulting	Partial evidence	Seattle, United StatesHQ checked Sep 28, 2026	11-50	15 contacts →
	Partial evidence “We provide Fire protection consulting and design services throughout the U.S.” Source: RevenueBase Database · checked Sep 28, 2026
13	Mwworks	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 28, 2026	1-10	13 contacts →
	Indirect evidence “mwworks llc is a Seattle based design studio offering architectural and interior design services to residential and commercial clients.” Source: RevenueBase Database · checked Sep 28, 2026
14	KE AD Building Consultants Kent Engineering Architectural Diagnostics	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 28, 2026	11-50	11 contacts →
	Indirect evidence “KE\|AD (Kent Engineering \| Architectural Diagnostics) has office's in both Seattle and Hawaii.” Source: RevenueBase Database · checked Sep 28, 2026
15	Green Earth Operations, INC	Partial evidence	Seattle, WA, United StatesHQ checked Sep 28, 2026	11-50	8 contacts →
	Partial evidence “Green Earth Operations is an environmental science and engineering firm providing objective analysis and environmentally responsible solutions to meet the needs of our clients.” Source: RevenueBase Database · checked Sep 28, 2026
16	Tfwb Engineers INC	Partial evidence	Seattle, WA, United StatesHQ checked Sep 28, 2026	11-50	7 contacts →
	Partial evidence “TFWB Engineers formerly Travis, Fitzmaurice & Associates is an electrical, telecommunications, and security design consulting firm.” Source: RevenueBase Database · checked Sep 28, 2026
17	Energy Retrofit	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 28, 2026	1-10	7 contacts →
	Indirect evidence “Energy Retrofit helps homeowners save money and become more energy efficient.” Source: RevenueBase Database · checked Sep 28, 2026
18	Snaplinc Consulting LLC	Partial evidence	Seattle, WA, United StatesHQ checked Sep 28, 2026	1-10	6 contacts →
	Partial evidence “Snaplinc Consulting provides corporate sustainability strategy across a range of industries with a focus on environmental and social reporting metrics, verification and…” Source: RevenueBase Database · checked Sep 28, 2026
19	Archetekt	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 28, 2026	1-10	6 contacts →
	Indirect evidence “Your biggest strategic risk isn’t disruption.” Source: RevenueBase Database · checked Sep 28, 2026
20	Archecology	Strong evidence	Seattle, WA, United StatesHQ checked Sep 28, 2026	1-10	5 contacts →
	Strong evidence “We help our partners and project teams understand complex sustainability strategies, evaluate the tradeoffs, and achieve their green building certification goals to produce…” Source: RevenueBase Database · checked Sep 28, 2026
21	Strata Architects	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 28, 2026	1-10	5 contacts →
	Indirect evidence “Strata Architects is a Seattle-based design firm dedicated to creating solutions for our clients that make a lasting impact.” Source: RevenueBase Database · checked Sep 28, 2026
22	Christopher Jones Architects	Partial evidence	Seattle, WA, United StatesHQ checked Sep 28, 2026	1-10	4 contacts →
	Partial evidence “Christopher Jones Architects is a Seattle based residential design firm founded on the belief that all buildings should be thoughtfully designed, well crafted, sustainable, and…” Source: RevenueBase Database · checked Sep 28, 2026
23	CES Consulting LLC	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 28, 2026	1-10	4 contacts →
	Indirect evidence “We are a team of experienced electrical engineers and consultants, who provide strategic planning and advocacy for our clients around the globe.” Source: RevenueBase Database · checked Sep 28, 2026
24	Twist Design INC	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 28, 2026	11-50	3 contacts →
	Indirect evidence “ABOUT TWIST uses experience, curiosity, and innovation to create client focused, sustainable places and spaces.” Source: RevenueBase Database · checked Sep 28, 2026
25	VE Services LLC	Partial evidence	Seattle, WA, United StatesHQ checked Sep 28, 2026	1-10	3 contacts →
	Partial evidence “VE provides an innovative and modern solutions to the complex building envelope issues facing architects and business owners.” Source: RevenueBase Database · checked Sep 28, 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: green 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 green building consulting firms.
Partial evidence: Its own public description names part of green 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 green 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 66 green building consulting firms based in Seattle, United States

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Green building consulting firms based in Seattle, United States at a glance

As of Sep 28, 2026

68.1%Verified-email coverage

60.7Average contacts per company

1-10Median size (employees)

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

501-1,000

1,001-5,000

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 66 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 green 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 Seattle, United States whose own description of what they do matches “green 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 green 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 green building 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, 2,730 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 28, 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.

Green building 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 green 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 green building consulting firms are there based in Seattle, United States?

RevenueBase identified 66 green building 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?

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

Which city in the United States has the most green building consulting firms?

New York leads the United States with 261 headquartered companies, followed by Chicago (104) and Houston (102). Seattle has 66.

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 2,730 verified decision-maker contacts tracked across these 66 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 28, 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.