Best Mold Remediation Companies in Portland, ME
IICRC S520 mold containment, removal, and post-clearance verification. Includes hidden moisture inspection, oxidative chemistry on porous materials, and Biostatic antimicrobial protocols.
15 firms indexed in Portland for this practice area.
From Old Port, West End, and Munjoy Hill, Portland carries a mix of housing stock that shapes how restoration work gets done, all in the shadow of Casco Bay. Locally, coastal storm surge, nor'easters, and ice-dam roof failures drive recurring water damage. Every firm ranked below serves Portland and the surrounding Maine area, and each is scored on the same public-source MetaScore, drawn from BBB, Google, IICRC certification, EPA Lead-Safe status, Yelp, Angi, and HomeAdvisor. That means a water-damage, mold, fire, or storm-restoration company in Portland earns its rank on verifiable signals, not advertising spend. Whether you are dealing with a burst pipe, a flooded basement, storm-driven roof intrusion, or lingering moisture, the ranking below shows which Portland restoration companies carry the strongest independently verified track record. Because water and storm damage in Portland rarely waits for business hours, the firms below are ranked to help you shortlist a trusted, IICRC-informed responder before the next emergency, not during it.
More about Portland: Wikipedia · Official city site
What are the best mold remediation companies in Portland, ME?
As of July 2026, Octagon Cleaning & Restoration ranks #1 among the 15 mold remediation firms indexed in Portland, ME, with a MetaScore of 90/100. Every firm below is scored on the same public-source signals (BBB, Google, IICRC, EPA Lead-Safe, Yelp, Angi, and HomeAdvisor).