NOAA climate normals
A measure of the outdoor moisture conditions buildings in the area routinely face — our calculated annual normal-hours at or above a 60° F dew point, from the nearest station’s NOAA normals.
See what mold remediation may cost in your area, based on local labor rates, climate and housing characteristics — not a national average with a city name attached.
Modeled national ranges — our cost model run at the US average construction wage, before your metro’s local wages and climate move it. Find your metro’s number below.
| Job type | Modeled range |
|---|---|
| Surface mold, single room | $550 – $1,500 |
| Attic | $1,200 – $4,350 |
| Crawl space | $1,700 – $7,150 |
| Basement | $2,100 – $8,000 |
| HVAC / ductwork | $2,300 – $7,200 |
| Whole-home / severe | $6,000 – $33,000 |
Remediation scope only — inspection, moisture-source repair and reconstruction may be quoted separately and are not included in these modeled ranges. These are modeled figures, not surveyed contractor quotes; small, isolated areas can fall below them, and the calculator adjusts for size and severity.
Choose your metro to see local modeled costs, climate data, housing characteristics and state remediation rules.
Three public inputs, priced per metro — not a national figure with a city name pasted on top.
A measure of the outdoor moisture conditions buildings in the area routinely face — our calculated annual normal-hours at or above a 60° F dew point, from the nearest station’s NOAA normals.
Housing age and structure — median year built, and the share of detached houses versus multifamily. These give context for the spaces and assemblies a contractor may encounter; property condition and water intrusion matter more at the individual-home level.
Construction laborer and supervisor wages for that specific metro (OEWS). Labor is priced at the local rate, then run through a documented cost model — published and versioned on the methodology page.
Our metro figures model local remediation costs using standardized project assumptions and local data. A contractor’s quote turns on the specifics of your job — which is why a real number can land above or below a modeled range:
The EPA says homeowners can often handle mold areas under about 10 square feet themselves. Larger areas, substantial water damage, hidden growth, HVAC involvement, recurring moisture, or sewage or flood contamination are stronger reasons to consider professional help. This site models cost and publishes state licensing rules — it isn’t health advice.
We’re a data publisher — not a contractor and not an inspector. We don’t visit homes and we don’t issue quotes. What we do is show our work: the model, the assumptions and the datasets are public, and the model is versioned so changes stay visible. If a figure looks wrong, tell us and we’ll correct it.
Current model v1-2026-08 · data reviewed August 2026 · Sources: NOAA climate normals · US Census ACS · BLS OEWS
Our modeled ranges for common single-area projects generally run from roughly $550 to $8,000, while whole-home or severe scopes can run substantially higher. Pick your metro for a modeled local range, or use the cost calculator for your specific situation.
Major cost drivers include how much material has to be removed and rebuilt, how hard the area is to reach — crawl spaces, attics and ductwork cost more per square foot — the containment a job requires, and whether HVAC systems are involved. A larger affected area and a moisture source that has to be fixed also push the number up.
Coverage often depends on the cause of the moisture and the specific policy. Mold from a covered sudden water loss may be treated differently from long-term seepage, humidity or maintenance problems, and mold coverage can carry separate exclusions or limits. Check your policy or ask your insurer.
Not always. An independent assessment can be useful for larger, hidden or recurring problems, insurance claims, real-estate transactions, or when you want the assessment kept separate from the remediation. Whether testing is worthwhile depends on the circumstances; the EPA does not recommend routine sampling simply to confirm whether mold is present.
The EPA says homeowners can often handle mold areas under about 10 square feet themselves. Larger or spreading areas, growth inside walls or HVAC, recurring moisture, or anything involving sewage or flood water are stronger reasons to consider a professional.
Duration varies with the affected area, how much material has to be removed, drying, containment and any reconstruction. A limited project may be completed relatively quickly, while multi-room or structurally involved work can take considerably longer.
Requirements vary by state. Some states license, register or certify mold assessors or remediators; others have no mold-specific state credential. Each metro page explains the current state requirements and links to the regulating agency.
Reading the data is free. If you choose to contact a provider through the site, we may earn a referral fee — it costs you nothing and it changes none of the published figures. The full explanation is here.
Walk through scope, size and access in the cost calculator for a modeled range built the same way our metro pages are.
Open the cost calculator