The 10 Best Mold Remediation Companies in Portland (2026)

Decide based on the scope of your issue: testing or environmental consultants focus on inspection and lab analysis, while remediation companies handle containment and cleanup. Ask each provider what services they offer, whether they include clearance testing after work, and what the written scope of work will look like.

Costs vary widely depending on the size of the affected area, the extent of contamination, access difficulty, and whether structural repairs are needed. Get multiple written estimates that break down testing, containment, removal, and any required repairs so you can compare scope and pricing.

Confirm insurance and liability coverage, ask for references or recent project photos, and request a clear written plan that includes containment methods and post-remediation clearance testing. Also verify any claimed certifications and make sure the timeline and cleanup standards are documented.

This list is derived from current Google review data and uses a Bayesian-style calculation that weights average rating by the number of reviews, updated for 2026. We relied on the businesses’ Google categories and publicly listed review counts to produce a review-backed ranking.