Top Rated Air Quality - Indoor Contractors Serving King County, WA

Last Updated Feb 18, 2025

778 Review Ratings and 4 Air Quality - Indoor Evaluated.

These companies have passed our Preliminary 5-step rating process.

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Passing Companies

Certification Research

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Each listed company below has passed our 5-step Preliminary rating process but has not yet completed and our Diamond Certified 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

company logo
Tim Zier
Manager
License: FARALCL001MR
location
  • 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

company logo
Greg Mackay
Manager
License: LEFTCCS829QB
location
  • 515 S Southern St
  • 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.

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Rating Step 2 = License

Verified active and in good standing (when required).

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Rating Step 3 = Background

Satisfactory status.

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Internet searches were performed seeking disqualifying information on each company.

Rating Step 4 = Complaints

Satisfactory status.

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Rating Step 5 = Specialist

Satisfactory status.

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