Average Mold Remediation Cost
EPA breaks remediation scope into small, medium, and large by square footage. Cost tracks that same scale closely.
| Size Category | Typical Range | Notes |
|---|---|---|
| Small (under 10 sq ft) | $300-$700 | The EPA/WA DOH DIY-workable line |
| Medium (10-100 sq ft) | $1,200-$3,750 | Most typical Spokane-area residential job |
| Large to Whole-Home (100+ sq ft) | $10,000-$30,000+ | Multi-room or structural-scale jobs; severe cases run higher |
Sourced from Angi and LendEdu 2026 cost data, cross-checked against bukrestoration.com's published cost breakdown.
The gap between the small and medium bands is wide because square footage alone doesn't determine cost the way it might seem to. A 15-square-foot patch behind a bathroom vanity that requires cutting into a wall cavity can cost more than a 40-square-foot area of exposed basement wall that's easy to access, which is part of why an actual on-site look matters more than a rough size estimate over the phone.
Cost by Room or Area
Some rooms cost more to remediate than others because of access difficulty and typical affected surface area.
| Area | Typical Range | Notes |
|---|---|---|
| Crawl Space | $1,500-$7,500 | Often paired with encapsulation as a follow-up recommendation |
| Attic | $2,000-$10,000 | Higher end due to surface area and access difficulty |
| Basement | $1,500-$6,000 | Finished space; moisture usually from groundwater or condensation |
Bathroom, kitchen, and HVAC-related mold jobs don't have a separately published Spokane-area range in the sources behind this guide. Because they're typically smaller, contained areas, they tend to fall within the small-to-medium bands in the table above rather than needing their own bracket. Ask for a written scope so you know exactly which size category your specific quote falls into.
HVAC-related mold, growth inside ductwork or on an evaporator coil, is a distinct case worth calling out. It's a smaller-footprint job by area, but duct cleaning and coil access require different equipment than drywall or subfloor removal, so it's worth confirming that whoever quotes it actually has HVAC-specific experience rather than treating it as a standard drywall remediation job with a different label.
Mold Testing and Inspection Cost
Visual-only inspections typically run $300 to $600 in Spokane. Adding lab sampling for air or surface tests brings the combined total closer to $500 to $1,200. Angi's own national average across all mold inspections it tracks, a mix that includes many jobs bundled with lab sampling, is around $650, a figure that shouldn't be read as the visual-only price on its own.
The number of samples collected, not just whether sampling happens at all, is what usually moves a testing quote within that $500 to $1,200 range. A single air sample in one room costs less than testing three separate rooms plus an outdoor control sample, which is standard practice for comparing indoor spore counts against a baseline.
What Drives the Price Up or Down
Four factors move a remediation quote more than anything else: the total size of the affected area, whether porous materials like drywall or insulation need to be removed versus non-porous surfaces like tile or metal that can often be cleaned, how difficult the space is to physically access, and how far the mold has spread from its original source.
What's Usually NOT Included
Reconstruction, replacing the drywall, insulation, or subfloor that got removed, and fixing the actual moisture source through plumbing repairs, ventilation upgrades, or waterproofing work, are almost always billed separately from the remediation scope itself. A remediation quote covers containment, removal, and treatment. It rarely covers putting the room back together or stopping the leak that caused the problem in the first place.
This split exists for a practical reason: the crew doing containment and removal work isn't necessarily the same trade that hangs drywall or fixes a plumbing leak, and bundling unrelated trades into one quote makes it harder to compare that quote against a competing bid. Two separate line items, remediation and reconstruction, are easier to evaluate individually than one combined number.
Does Insurance Cover It?
Generally only when the mold resulted from a sudden, accidental, covered event, like a burst pipe, rather than from gradual leaks or long-term humidity that an insurer can classify as deferred maintenance. Check your specific policy wording and document the cause of the moisture before filing, since that documentation is often what determines whether a claim gets approved or denied.
How to Read a Quote
A clear quote itemizes containment, removal, treatment, and any post-work testing separately, and states plainly whether reconstruction or moisture-source repair is included or billed separately. Ask what size category your job falls into, which materials are being removed versus cleaned in place, and whether the price includes a post-remediation walkthrough. A contractor who can answer those questions specifically, rather than in generalities, is easier to compare fairly against another bid.
Get a real number for your situation
Six fields, no account needed. A local crew follows up to confirm scope and pricing before anything gets scheduled.
Cost questions, answered plainly
How much does mold remediation cost on average?
Most Spokane-area residential mold remediation jobs fall between $1,200 and $3,750, with a small contained spot as low as $300 to $700 and whole-house remediation reaching $10,000 to $30,000 or more depending on scope, materials affected, and how many rooms are involved.
How much does mold testing cost?
Visual-only testing or inspection generally runs $300 to $600 in Spokane; adding lab sampling for air or surface analysis brings the typical combined total to $500 to $1,200, depending on how many samples the specific situation calls for and whether multiple rooms are involved.
How much does mold inspection cost in Spokane?
Similar to testing costs: a standard visual-only inspection commonly runs $300 to $600 in Spokane, scaling with home size and how many areas need checking, while Angi's national average across all inspection types, including many bundled with lab sampling, is around $650.
What affects mold remediation pricing the most?
The size of the affected area, whether porous materials like drywall or insulation need removal versus non-porous surfaces like tile, how difficult the space is to access (crawl space and attic cost more), and how far the mold has spread all directly move the price.
Does insurance ever cover the cost?
Sometimes, but typically only when the mold resulted from a sudden, accidental, covered event like a burst pipe, not from gradual leaks or long-term humidity that a policy can treat as neglect. Check your policy wording and document the cause before filing.
What is NOT included in a typical remediation quote?
Reconstruction, meaning replacing removed drywall, insulation, or subfloor, and fixing the moisture source itself through plumbing repairs, ventilation upgrades, or waterproofing work, are almost always billed separately from the remediation scope itself; ask any contractor explicitly what's included before comparing competing bids.