Mold Remediation Cost in San Diego, CA
Mold remediation is usually priced by the square foot of affected area, and published national guides run about $10 to $25 per square foot. Here are the published ranges, what pushes a San Diego, California job up or down, the state and city rules that affect the price, and a calculator for a planning figure before you compare free quotes.
Get a Free Quote Call (619) 489-9035Published mold remediation and inspection prices
No reliable price survey for San Diego mold remediation turned up, so these are the most recent national guides. They are planning numbers, not prices from this site.
| Item | Typical range | Source |
|---|---|---|
| Mold remediation, overall | $1,500–$9,000 (avg ≈ $3,500) · $1,200–$3,750 (avg ≈ $2,300) | Fixr, Aug 2025 · This Old House, Mar 2026 |
| Per square foot | $10–$30 · $10–$25 (avg ≈ $18) | Fixr · This Old House |
| Mold inspection / testing | $450–$800 (avg ≈ $500); inspection only $300–$600 | Fixr, Jan 2025 |
| Bathroom | $500–$1,500 · $500–$1,000 | Fixr · This Old House |
| Attic | $1,500–$9,000 · $1,000–$4,000 | Fixr · This Old House |
| HVAC / ducts | $3,000–$10,000 | Fixr · This Old House |
| Crawl space | $500–$2,000 | Fixr · This Old House |
Published national estimates, not quotes (Fixr, Aug 2025; This Old House, Mar 2026). Quotes come from independent companies, not this site.
For a local reference point on inspections only, one cost aggregator lists mold inspection in San Diego at about $312 to $491 for a 500 square foot example (homeyou, Sep 2026). It is an aggregator estimate, not a survey of local companies.
How much does mold remediation cost in San Diego?
There is no California price list, and no one can tell you what your job costs without seeing it. What changes the number:
- Square footage. The biggest factor. What you see on the surface is often smaller than what turns up behind drywall, under a cabinet or beneath carpet pad once the wall is opened.
- Where it is in the house. An open bathroom wall is quicker than an attic under a tile roof, a closet full of belongings or an air handler in a tight space.
- HVAC involvement. Mold in ducts or an air handler runs $3,000 to $10,000 in the published ranges, and repairing the system itself is a separate trade.
- Materials removed. Framing and other hard surfaces can often be cleaned. Moldy drywall, insulation, carpet and pad usually have to be cut out, bagged and hauled away.
- Containment and HEPA cleanup. Larger jobs need plastic walls, sealed doorways and air filtration so spores don't spread. In a condo, protecting shared hallways can add setup.
- The moisture fix. A leaking supply line, shower pan, roof or AC drain has to be fixed or the mold comes back. That is often a plumber or roofer and a separate bill.
- Independent testing. An inspection or clearance test from a separate company adds about $300 to $800 (Fixr, Jan 2025). California doesn't require it.
- Asbestos in older buildings. In a building with five or more units, San Diego County APCD Rule 1206 requires an asbestos survey before renovation and 10 working days' notice when 100 square feet or more of material is disturbed. Houses and buildings with four or fewer units are outside the rule, but testing before tear-out in an older home is still good practice, and only a Cal/OSHA Certified Asbestos Consultant can provide asbestos consulting.
- Rebuild and permits. In the City of San Diego, like-for-like repairs of $1,000 or less with no electrical, plumbing or mechanical work need no building permit, and up to 100 square feet of drywall replaced as part of such a repair is exempt. Larger jobs usually need a No-Plan permit (Information Bulletin 203, July 2024). Historic homes are excluded from the exemptions. In other cities, check with your city.
Mold remediation cost calculator
Enter the affected area, pick where the mold is and tick the box if you want independent testing first.
Area priced at $10 to $25 per square foot (This Old House, Mar 2026). Job-type limits come from the published Fixr (Aug 2025) and This Old House (Mar 2026) ranges in the table above.
Typical range: $1,000–$2,500
100 sq ft of affected area at $10 to $25 per sq ft. Estimate only.
A planning figure from published national ranges, not a quote. It leaves out rebuild, roof, plumbing and HVAC repairs, asbestos work and contents. Quotes come from independent companies, not this site.
California rules that affect the price
California does not license mold inspection or remediation as its own trade, so checking credentials is up to you. The Contractors State License Board (CSLB) list of license classifications has no mold class. What you can check: a CSLB contractor license for repair work of $1,000 or more or for any job that needs a permit (the minor-work limit rose from $500 to $1,000 on January 1, 2025), IICRC and ACAC certifications in their public locators, and an insurance certificate. Never assume a company is licensed for mold, because no such license exists.
A home improvement contract above $500 must be in writing under B&P 7159. If a company signs you up in your home, Civil Code 1689.6 generally lets you cancel until midnight of the third business day (fifth for seniors), and seven business days for repairs after a declared disaster such as the January 2024 flood.
The state never set mold exposure limits; the health department concluded in 2005 that science-based limits could not be set. Be wary of any quote that promises to bring your home under a "California standard."
Will insurance pay for it?
The California Department of Insurance Residential Insurance Guide (Jan 2026) lists mold and flood among the perils that are usually excluded. It says sudden and accidental water damage is typically covered, while water damage from seepage or leaks is not, and that flood coverage is generally not provided in a homeowners or renters policy. An NFIP flood policy covers up to $250,000 for the structure and $100,000 for contents. Check your declarations page and call your insurer before anything is torn out. No one, including this site or the companies that reply, can promise what a policy will pay.
What to ask each company for
- A CSLB license number for repair work, which you can look up yourself.
- IICRC or ACAC certifications, also searchable.
- An insurance certificate naming the company.
- A written protocol and scope listing the areas, containment, what will be removed and how drying will be checked.
- Who does clearance testing, and whether it is an independent company.
- An asbestos check before tear-out in an older home.
- The moisture-source fix, and whether it is in the price.
- A written contract that meets B&P 7159, with the cancellation notice.
If the mold is in a bathroom or shower, an attic or ducts and mini-splits, those pages explain what the job usually involves, and mold removal covers the full remediation process.
Mold cost questions
How much does mold remediation cost per square foot?
Published national guides put it at $10 to $25 per square foot of affected area (This Old House, Mar 2026) or $10 to $30 (Fixr, Aug 2025). So 100 square feet of moldy drywall often prices near $1,000 to $2,500 before testing, leak repairs or rebuild. San Diego quotes vary with access, materials and how far the water spread.
How much does a mold inspection cost in San Diego?
Fixr's January 2025 national figures put an inspection with testing at $450 to $800, with an average near $500, and an inspection alone at about $300 to $600. One cost aggregator lists San Diego inspections at about $312 to $491 for a 500 square foot example (homeyou, Sep 2026). The CDC does not recommend routine mold testing, so ask what a test would change.
How much does bathroom mold removal cost?
Fixr puts bathroom mold remediation at $500 to $1,500 and This Old House at $500 to $1,000. Surface spots on tile and caulk are usually a cleaning job. The price climbs when the mold is inside the wall from a shower pan or supply leak, because the leak, the tile and the drywall all need work. See bathroom and shower mold.
Do I need a licensed contractor for a small mold job?
It depends on the price and the permit. Since January 1, 2025, California's minor-work exemption covers jobs under $1,000 that need no permit and where the person hires no helpers. A job of $1,000 or more, or one that needs a permit, needs a CSLB license. Look it up on the CSLB site before you sign.
Why do mold quotes vary so much?
Companies may be quoting different jobs. One includes containment, removal, HEPA cleaning and drying; another leaves out the leak repair, the rebuild or clearance testing. With no state mold license, scopes are not standardized. Ask each company for a written scope and protocol so you can compare line by line.
Get free quotes in San Diego, CA
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