Company lists · Data refreshed October 2026

Top 25 Eco-friendly architecture firms based in Seattle, United States

Name: Eco-friendly architecture firms based in Seattle, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Oct 11, 2026 100 companies tracked

RevenueBase identified 100 company matches for eco-friendly architecture firms associated with Seattle, United States as of October 2026 and tracks 1,240 professional contacts across them, including 724 with verified work emails. Across the United States, New York is the largest hub for this category (274 companies); Seattle has 100.

This list covers company matches for eco-friendly architecture firms associated with Seattle, United States, 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 October 11, 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 Oct 11, 2026 How this list was built

100Companies

1,240Contacts tracked

724Verified emails

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The 25 largest eco-friendly architecture firms based in Seattle, United States

Ranked by team size

Top 25 of 100 company matches for eco-friendly architecture firms based in Seattle, United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Oct 11, 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.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	Mithun	Exact match	Seattle, WA, United StatesHQ recorded Oct 11, 2026	51-200	297 contacts →
	Exact match “Mithun is an integrated design firm dedicated to creating positive change in people’s lives.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
2	LMN Architects	Exact match	Seattle, WA, United StatesHQ recorded Oct 11, 2026	51-200	180 contacts →
	Exact match “About LMN Architects Seattle-based LMN Architects specializes in the planning and design of significant public and private facilities, including convention centers, cultural arts…” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
3	The Miller Hull Partnership, LLP	Exact match	Seattle, WA, United StatesHQ recorded Oct 11, 2026	51-200	113 contacts →
	Exact match “The Miller Hull Partnership is an architecture and planning firm rooted in environmentally-responsible designs that create a regenerative and inclusive future.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
4	Collinswoerman	Exact match	Seattle, WA, United StatesHQ recorded Oct 11, 2026	51-200	58 contacts →
	Exact match “We believe that great design drives extraordinary value.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
5	SMR Architects	Exact match	Seattle, WA, United StatesHQ recorded Oct 11, 2026	11-50	50 contacts →
	Exact match “SMR Architects is a full-service architecture firm established in Seattle in 1977 as Stickney & Murphy Architects.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
6	TCA Architecture Planning Design	Exact match	Seattle, WA, United StatesHQ recorded Oct 11, 2026	11-50	29 contacts →
	Exact match “TCA represents a 60+ year evolution of experience providing personalized design services for a wide range of challenging and notable projects.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
7	Ecotope, INC	Exact match	Seattle, WA, United StatesHQ recorded Oct 11, 2026	11-50	28 contacts →
	Exact match “Ecotope has provided sustainable building design consulting and engineering services in the Pacific Northwest for over 40 years.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
8	Weinstein A U	Exact match	Seattle, WA, United StatesHQ recorded Oct 11, 2026	11-50	28 contacts →
	Exact match “At Weinstein AU, we look for ways to make our complex world a more balanced, inspirational, and productive place in which to live, work, and participate in civic life.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
9	Delta E Consulting	Exact match	Seattle, WA, United StatesHQ recorded Oct 11, 2026	11-50	27 contacts →
	Exact match “At Delta E, we specialize in a diverse range of consulting services, including Sustainability, Carbon consulting, Energy services, and design expertise in Mechanical, Electrical…” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
10	ARC Architects	Exact match	Seattle, WA, United StatesHQ recorded Oct 11, 2026	11-50	26 contacts →
	Exact match “ARC Architects works closely with its clients to design projects that meet their needs and inspire their organizations.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
11	Runberg Architecture Group	Exact match	Seattle, WA, United StatesHQ recorded Oct 11, 2026	11-50	24 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
12	Johnson Braund, INC	Exact match	Seattle, WA, United StatesHQ recorded Oct 11, 2026	11-50	21 contacts →
	Exact match “Johnson Braund is a full-service architecture firm founded in 1977 that has been designing projects across the nation.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
13	Shed Architecture & Design	Exact match	Seattle, WA, United StatesHQ recorded Oct 11, 2026	11-50	18 contacts →
	Exact match “SHED engages architecture as a practical art.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
14	Prentiss Balance Wickline Architects	Exact match	Seattle, WA, United StatesHQ recorded Oct 11, 2026	11-50	16 contacts →
	Exact match “We are Prentiss + Balance + Wickline Architects.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
15	Cast Architecture	Exact match	Seattle, WA, United StatesHQ recorded Oct 11, 2026	11-50	15 contacts →
	Exact match “CAST architecture is a Seattle-based firm with extensive experience designing contemporary spaces throughout the Northwest.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
16	Mwworks	Exact match	Seattle, WA, United StatesHQ recorded Oct 11, 2026	1-10	13 contacts →
	Exact match “mwworks llc is a Seattle based design studio offering architectural and interior design services to residential and commercial clients.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
17	B9 Architects	Exact match	Seattle, WA, United StatesHQ recorded Oct 11, 2026	1-10	12 contacts →
	Exact match “b9 architects' work focuses on creating positive change in the urban environment through innovative place-specific modern architecture.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
18	JW Architects	Exact match	Seattle, WA, United StatesHQ recorded Oct 11, 2026	11-50	12 contacts →
	Exact match “JW Architects is an architecture firm that specializes in residential and mixed use designs in the greater Seattle area.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
19	Deforest Architects Pllc	Exact match	Seattle, WA, United StatesHQ recorded Oct 11, 2026	11-50	10 contacts →
	Exact match “DeForest Architects brings people, building, and ideas together with an inventive spirit.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
20	Side X Side Architects	Exact match	Seattle, WA, United StatesHQ recorded Oct 11, 2026	1-10	10 contacts →
	Exact match “Formerly SKL Architects, Working side by side with mission-driven organizations to create buildings and spaces that unite the physical beauty of architectural design with the…” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
21	Bumgardner Architects	Exact match	Seattle, WA, United StatesHQ recorded Oct 11, 2026	11-50	9 contacts →
	Exact match “Bumgardner is a nationally recognized, award-winning, architecture and design firm that thrives on designing all of the built elements that make great communities.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
22	Wittman Estes	Exact match	Seattle, WA, United StatesHQ recorded Oct 11, 2026	1-10	8 contacts →
	Exact match “We believe buildings and landscapes can be combined into one interconnected whole.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
23	Public47 Architects LLC	Exact match	Seattle, WA, United StatesHQ recorded Oct 11, 2026	1-10	8 contacts →
	Exact match “PUBLIC47 is an architecture firm guided by a passion for thoughtful design.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
24	Energy Retrofit	Exact match	Seattle, WA, United StatesHQ recorded Oct 11, 2026	1-10	8 contacts →
	Exact match “Energy Retrofit helps homeowners save money and become more energy efficient.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
25	Cross 2 Design Group C2dg	Exact match	Seattle, United StatesHQ recorded Oct 11, 2026	11-50	7 contacts →
	Exact match “Established in 2009, Cross 2 Design Group (C2DG) concentrates on building better through quality architectural and building envelope design.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “eco-friendly architecture firms”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 25 of 100 eco-friendly architecture firms based in Seattle, United States

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Eco-friendly architecture firms based in Seattle, United States at a glance

As of Oct 11, 2026

58.4%Verified-email coverage

12.4Average contacts per company

1-10Median size (employees)

Oct 11, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

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 100 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 Seattle, United States whose business descriptions match “eco-friendly architecture firms” 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 724 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 October 11, 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.

Eco-friendly architecture firms by metro in the United States

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 “eco-friendly architecture firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many eco-friendly architecture firms are there based in Seattle, United States?

RevenueBase identified 100 company matches for eco-friendly architecture firms associated with Seattle, United States as of October 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?

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

Which city in the United States has the most eco-friendly architecture firms?

New York leads the United States with 274 company records, followed by Los Angeles (136) and Seattle (100).

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 724 professional contacts with verified work emails tracked across these 100 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 October 11, 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.