Top Rated Air Quality - Indoor Contractors Serving King County, WA
Last Updated May 15, 2026
5775 Review Ratings and 3 Air Quality - Indoor Companies Evaluated.
These companies have passed our Preliminary 5-step rating process.
Farallon Consulting
Farallon Consulting offers indoor air quality services to residential and commercial clients in Seattle And other nearby areas. The company is qualified to work on all types of indoor air quality projects, and its technicians prioritize safety on every job.
Services
Environmental Consultant, Due Diligence, Contaminated Site Investigation and Cleanup, Engineering Services, Permits and Regulatory Compliance, Insurance Claim Evaluation, Mediation and Litigation Support, Natural Resources, Business consulting
Coverage Areas
Issaquah Area
- 975 5th Ave NW
- Issaquah, WA 98027
Left Coast Services
Services
Home Inspectors, Environmental Testing, Residential Services, Commercial Services, Real Estate Agents
Coverage Areas
Seattle Area
- 515 S Southern St
- Seattle, WA 98108
Evergreen Home Heating and Energy
Evergreen Home Heating and Energy provides comprehensive heating, cooling, and air quality solutions, including installation, maintenance, and repair services. They cater to residential customers in the Greater Seattle area, ensuring comfort and energy efficiency for homes.
Services
Electrical Contractor including outlet installations, subpanel installation, lighting repairs, whole home surge protectors, tune ups, air conditioning repair, furnace repair, heat pump repair, natural gas piping, duct cleaning, carbon monoxide checks, indoor air quality, gas furnaces, ductless heat pumps, dual fuel hybrid heat pumps, electrical, thermostats and home automation solutions.
Coverage Areas
The Seattle Area including King County—key cities including Algona, Ballard, Capital Hill, Des Moines, Eastgate, Fremont, Greenwood, Hunts Point, Kent, Lake City, Magnolia, Normandy Park, Phinney Ridge, Renton, SeaTac, Tukwila, Wallingford, White Center and Yarrow Point.
- 727 S Kenyon St Ste B
- Seattle, WA 98108
These companies have earned our Pre-Qualified Rating. Learn more about our 5-step process.
Rating Step 1 = Stars
Meet or exceed a
ONE AllRatings star score of 4.5.
Indicates the final super-composite calculation of all reviews scores from all sources, optimized for accuracy and recency.
Read ONE AllRatings methodologyRating Step 2 = License
Verified active and in good standing (when required).
State license bureau data is accessed and analyzed.
Rating Step 3 = Background
Satisfactory status.
Internet searches were performed seeking disqualifying information on each company.
Rating Step 4 = Complaints
Satisfactory status.
Complaint bureau records have been searched seeking disqualifying information on each company.
Search Better Business BureauRating Step 5 = Specialist
Satisfactory status.
Our research specialist verifies all ratings steps have been passed and creates a final report and profile.
Meet our research specialist team
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