Cost guide

How Much Does Mold Removal Cost?

Mold removal (remediation) costs $1,200 to $3,800 for a typical job, or roughly $10 to $25 per square foot. Small, contained spots can run $500 to $1,500, while whole-home or HVAC-borne mold can reach $10,000 to $30,000. Price is driven mostly by how much area is affected and where the mold has spread.

By Marcus Vidal, Restoration Cost Analyst · Reviewed by Dana Whitfield · Last reviewed July 2026

The numbers

Mold Removal Cost — 2026 prices

Remediation is priced by the size of the affected area and how deeply mold has penetrated building materials. Here is what typical 2026 jobs run.

Mold remediation job	Typical cost
Small, contained spot Under ~10 sq ft, single surface	$500 – $1,500
One room, bathroom, or attic Most common job — the $10–$25/sq ft range	$1,200 – $3,800
Mold inspection & lab testing Identify type and extent before work	$300 – $1,000
Toxic / black mold remediation Stachybotrys, containment required	$2,000 – $6,000
Whole-home or HVAC system Spread through ductwork or framing	$10,000 – $30,000

What drives the cost of mold removal

Two factors dominate the price: the size of the affected area and its location. Surface mold on tile is cheap to treat; mold inside drywall, insulation, subfloor, or an HVAC system requires containment, material removal, and rebuild — which is where costs climb.

The source water category matters too. Mold from a clean supply-line leak is more straightforward than mold fed by grey or black water, which brings contamination handling on top of the mold work.

Affected area (priced per square foot once past a small spot)
Location — behind drywall, in HVAC, crawlspace, or attic costs far more than a visible surface
Mold type — toxic species like Stachybotrys ("black mold") require stricter containment
Whether materials must be removed and rebuilt versus cleaned in place

When to call a professional

Any mold covering more than about 10 square feet, any mold in an HVAC system, and any mold following a sewage or flood event should be handled by a certified remediation company — not cleaned casually. Professionals contain the area to prevent spores spreading, remove affected materials, treat and dry the cavity, and verify with post-remediation testing.

Because mold almost always signals an ongoing moisture problem, fixing the water source is part of the job. Left alone, mold keeps returning and the remediation cost recurs.

Will insurance cover it?

Sudden, accidental damage — like a burst pipe — is often covered by a standard homeowners policy. Damage from external flooding or slow, long-term leaks is usually excluded unless you carry separate flood insurance or a water-backup endorsement (roughly $50–$250 per year). Coverage varies by policy, so confirm your specific terms before assuming.