Company lists · Data refreshed October 2026

Top 21 Commercial solar engineering firms based in Seattle, United States

Name: Commercial solar engineering 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 10, 2026 34 companies tracked

RevenueBase identified 34 company matches for commercial solar engineering firms associated with Seattle, United States as of October 2026 and tracks 510 professional contacts across them, including 246 with verified work emails. Across the United States, New York is the largest hub for this category (147 companies); Seattle has 34.

This list covers company matches for commercial solar engineering 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 10, 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 10, 2026 How this list was built

34Companies

510Contacts tracked

246Verified emails

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The 21 largest commercial solar engineering firms based in Seattle, United States

Ranked by team size

Top 21 of 34 company matches for commercial solar engineering firms based in Seattle, United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Oct 10, 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	Hargis Engineers	Exact match	Seattle, WA, United StatesHQ recorded Oct 10, 2026	201-500	192 contacts →
	Exact match “Hargis Engineers is a mechanical, electrical, telecommunications, security, energy consulting engineering, and commissioning firm.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
2	A&r Solar	Exact match	Seattle, WA, United StatesHQ recorded Oct 10, 2026	51-200	40 contacts →
	Exact match “A&R Solar installs solar energy systems for homes and businesses across Washington and Oregon.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
3	Solterra	Exact match	Seattle, WA, United StatesHQ recorded Oct 10, 2026	11-50	40 contacts →
	Exact match “Solterra creates some of the most sustainable, livable, and innovative buildings in the Pacific Northwest.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
4	Puget Sound Solar	Exact match	Seattle, WA, United StatesHQ recorded Oct 10, 2026	11-50	32 contacts →
	Exact match “Puget Sound Solar designs, sells, installs, and services solar energy systems and electric vehicle charging stations.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
5	Ecotope, INC	Exact match	Seattle, WA, United StatesHQ recorded Oct 10, 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 10, 2026 · View company records in RevenueBase
6	Artisan Electric INC	Exact match	Seattle, WA, United StatesHQ recorded Oct 10, 2026	11-50	21 contacts →
	Exact match “Artisan Electric installs solar panels, electrical and EV chargers in Seattle & Western Washington.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
7	Sunergy Systems	Exact match	Seattle, WA, United StatesHQ recorded Oct 10, 2026	11-50	20 contacts →
	Exact match “Sunergy Systems is an employee-owned company located in Ballard and serving the Puget Sound area since 2005.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
8	Pacific Engineering Technologies, INC	Exact match	Seattle, WA, United StatesHQ recorded Oct 10, 2026	11-50	15 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
9	Sphere Solar Energy	Exact match	Seattle, WA, United StatesHQ recorded Oct 10, 2026	1-10	15 contacts →
	Exact match “Sphere Solar Energy values craftsmanship and paying it forward.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
10	Energy Retrofit	Exact match	Seattle, WA, United StatesHQ recorded Oct 10, 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 10, 2026 · View company records in RevenueBase
11	CETS	Exact match	Seattle, WA, United StatesHQ recorded Oct 10, 2026	11-50	5 contacts →
	Exact match “WHAT WE DO CETS, Inc.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
12	CES Consulting LLC	Exact match	Seattle, WA, United StatesHQ recorded Oct 10, 2026	1-10	4 contacts →
	Exact match “We are a team of experienced electrical engineers and consultants, who provide strategic planning and advocacy for our clients around the globe.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
13	Watts Matter	Exact match	Seattle, WA, United StatesHQ recorded Oct 10, 2026	11-50	4 contacts →
	Exact match “Watts Matter designs and deploys energy infrastructure for industry and government, solar generation, battery storage, thermal storage, microgrids, and CHP.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
14	Rainier Stormwater Engineering	Exact match	Seattle, United StatesHQ recorded Oct 10, 2026	1-10	4 contacts →
	Exact match “Civil engineering services for residential and commercial clients.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
15	West Seattle Natural Energy, LLC	Exact match	Seattle, WA, United StatesHQ recorded Oct 10, 2026	1-10	3 contacts →
	Exact match “West Seattle Natural Energy, LLC is a Veteran Owned, Family Operated Small Business specializing in Solar PV Electric Systems and Solar Thermal Domestic Hot Water Systems.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
16	OHM Electrical Contracting	Exact match	Seattle, WA, United StatesHQ recorded Oct 10, 2026	1-10	3 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
17	Solphos	Exact match	Seattle, WA, United StatesHQ recorded Oct 10, 2026	1-10	2 contacts →
	Exact match “Solphos is a Seattle-based solar installer offering best-in-class renewable energy solutions at exceptional value for homeowners and builders across Western Washington.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
18	Electrical Support Company	Exact match	Seattle, United StatesHQ recorded Oct 10, 2026	1-10	2 contacts →
	Exact match “Commercial, Residential, Marine & Industrial” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
19	Unico Solar Investors	Exact match	Seattle, WA, United StatesHQ recorded Oct 10, 2026	11-50	1 contacts →
	Exact match “Unico Solar Investors is a wholly-owned subsidiary of Unico Investment Group that develops, owns, and operates solar energy systems for its own real estate portfolio and for…” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
20	FAC Systems INC	Exact match	Seattle, WA, United StatesHQ recorded Oct 10, 2026	1-10	1 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
21	Sweek Consulting Engineers	Exact match	Seattle, WA, United StatesHQ recorded Oct 10, 2026	1-10	1 contacts →
	Exact match “Sweek Consulting Engineers, LLC is a Seattle-based consulting firm specializing in energy efficiency engineering consulting services within the construction industry.” Recorded in the RevenueBase company graph · Oct 10, 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 “commercial solar engineering 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 21 of 34 commercial solar engineering firms based in Seattle, United States

See the full list, filter by size, metro and specialty, and access 246 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Commercial solar engineering firms based in Seattle, United States at a glance

As of Oct 10, 2026

48.2%Verified-email coverage

15.0Average contacts per company

11-50Median size (employees)

Oct 10, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

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 34 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 “commercial solar engineering 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 246 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 10, 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.

Commercial solar engineering 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 “commercial solar engineering firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many commercial solar engineering firms are there based in Seattle, United States?

RevenueBase identified 34 company matches for commercial solar engineering 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?

Hargis Engineers 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 commercial solar engineering firms?

New York leads the United States with 147 company records, followed by Houston (134) and San Diego (132). Seattle has 34.

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 246 professional contacts with verified work emails tracked across these 34 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 10, 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.