Octagon Cleaning & Restoration
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Octagon Cleaning & Restoration holds a 4.7-star rating across 190 Google reviews, which matters in Portland where high humidity (72% average) and 47 inches of annual rainfall create ideal conditions for mold growth. With most homes built around 1950, moisture problems are common, and having a trusted contractor matters. That rating reflects real homeowner experience dealing with the mold issues that plague older houses in this climate.
Maine doesn't require a specific mold remediation license, so before you call, verify that Octagon holds a valid contractor license and carries appropriate insurance. Ask whether they hold IICRC S520 certification, which indicates formal training in mold remediation standards. Typical projects in Portland run $1,200 to $3,800 depending on scope, so get a detailed estimate in writing and confirm what's covered before work begins.
Summary drawn from 190 Google reviews. We do not represent or endorse this firm.
Credentials & Verification
IICRC Certified Firm
Certified Firm · Master Designation · Applied Microbial Remediation Technician · Applied Structural Drying · Odor Control Technician · Trauma and Crime Scene Technician · Water Damage Restoration Technician · Fire and Smoke Damage Restoration Technician
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Business data sourced from public records · Last updated April 2026
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