Mold remediation cost calculator

Remediation is priced per square foot of affected material. Fixr's national cost guide puts the average at $10 to $30 per square foot, so the low and high figures are your area times those two rates.

The typical figure sits inside that range depending on where the mold is. Harder access and more containment push it higher: walls or a room sit at 40% of the way from low to high, a basement at 45%, an attic at 60%, a crawlspace at 65%, and HVAC or ductwork at 70%. Those placements are our judgment, not separate price data.

An inspection adds $300 to $1,075, the range HomeAdvisor reports for a professional mold inspection.

• Fixing the leak or moisture source, and drying wet materials first.
• Rebuild: new drywall, insulation, flooring, or paint after removal.
• Clearance testing by an independent assessor after the work.
• Lab fees for air or surface samples beyond the inspection.
• Minimum job charges, which many shops have for small areas.

Add up every moldy or water-stained surface, not the floor area of the room. A wall 10 feet wide and 8 feet tall is 80 square feet. If growth runs behind drywall or under flooring, the real area is usually larger than what you can see, which is one reason an inspection comes before a firm price.