Mold Removal Contractors in San Francisco, CA

San Francisco's median home was built in 1952, which means most houses here have decades of potential moisture problems baked into their bones. Combine that with the city's 78% average humidity and 24 inches of annual rainfall, and you've got the perfect setup for mold. Older foundations, aging wood framing, and vintage plumbing systems are especially vulnerable. The moisture doesn't come from dramatic flooding, but from slow, persistent dampness - crawlspaces that never fully dry, walls that sweat during foggy mornings, and pipes that weep behind walls for years before anyone notices.

A typical mold remediation project in San Francisco runs between $2,500 and $7,500. The actual cost depends on how much of your home is affected, whether the problem is in an accessible space like a basement or hidden behind walls (which costs more), and how extensive the cleanup needs to be. Larger jobs or homes with multiple problem areas can push toward the higher end.

California doesn't have a dedicated state license specifically for mold remediation, so don't expect one. What you do need: a contractor with a valid Contractor's State License Board (CSLB) license, proof of liability insurance, and ideally IICRC (Institute of Inspection, Cleaning and Restoration Certification) credentials. Always verify these before hiring.

Here's the San Francisco-specific catch: get a moisture assessment done before you hire anyone. The fog and humidity mean mold can hide in places you'd never expect, and knowing exactly where the water is coming from will save you from expensive repeat problems.