Estimates only. Figures are based on regional data and industry surveys. Actual costs vary by scope, materials, and contractor. Always get at least 3 quotes before proceeding.

Mold Remediation Cost in California

Local price estimates for 115 California cities, adjusted for humidity levels and contractor market size. Select your city for a detailed breakdown.

Licensing in California

California does not have a specific state license for mold remediation. However, contractors must hold a valid Contractor's State License Board (CSLB) license. Always verify insurance and IICRC certification.

Typical Cost Ranges

ScopeAreaTypical Cost
Small / surface<10 sq ft$500 – $1,500
Medium10–100 sq ft$1,500 – $5,000
Large / structural100+ sq ft or HVAC$5,000 – $30,000+

Sources: EPA guidance, IICRC S520, industry surveys. Estimates as of 2026.

Frequently Asked Questions

How much does mold remediation cost in California?

Costs typically range from $1,500 to $5,000 for medium-sized jobs. Small surface mold starts around $500; large structural infestations can exceed $15,000. Costs vary by city — see local estimates below.

Should I get an inspection before hiring a remediation contractor?

Yes — an independent inspection defines the scope before you get quotes, and gives you an unbiased assessment not tied to a contractor's profit motive. Use an inspector who does not also offer remediation services.

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Cost Estimates by City in California

Los Angeles 17 contractors · 73% humidity San Diego 22 contractors · 73% humidity San Jose 25 contractors · 65% humidity San Francisco 22 contractors · 78% humidity Fresno 23 contractors · 53% humidity Sacramento 18 contractors · 62% humidity Long Beach 22 contractors · 73% humidity Oakland 3 contractors · 77% humidity Bakersfield 21 contractors · 43% humidity Anaheim 20 contractors · 64% humidity Stockton 16 contractors · 61% humidity Riverside 3 contractors · 56% humidity Santa Ana 8 contractors · 65% humidity Irvine 11 contractors · 67% humidity Chula Vista 17 contractors · 71% humidity Fremont 16 contractors · 71% humidity Santa Clarita 16 contractors · 51% humidity San Bernardino 7 contractors · 55% humidity Modesto 18 contractors · 57% humidity Moreno Valley 8 contractors · 54% humidity Fontana 12 contractors · 52% humidity Oxnard 21 contractors · 75% humidity Huntington Beach 14 contractors · 72% humidity Glendale 17 contractors · 61% humidity Santa Rosa 17 contractors · 68% humidity Ontario 12 contractors · 58% humidity Elk Grove 8 contractors · 64% humidity Rancho Cucamonga 6 contractors · 56% humidity Oceanside 5 contractors · 76% humidity Garden Grove 10 contractors · 68% humidity Lancaster 17 contractors · 42% humidity Salinas 10 contractors · 75% humidity Hayward 12 contractors · 76% humidity Corona 18 contractors · 58% humidity Escondido 20 contractors · 70% humidity Pomona 11 contractors · 60% humidity Roseville 9 contractors · 60% humidity Torrance 11 contractors · 73% humidity Fullerton 10 contractors · 64% humidity Visalia 4 contractors · 50% humidity Orange 4 contractors · 65% humidity Pasadena 18 contractors · 59% humidity Santa Clara 8 contractors · 65% humidity Thousand Oaks 11 contractors · 58% humidity Simi Valley 15 contractors · 55% humidity Vallejo 4 contractors · 73% humidity Concord 13 contractors · 68% humidity Berkeley 7 contractors · 76% humidity Fairfield 4 contractors · 68% humidity East Los Angeles 7 contractors · 65% humidity Richmond 5 contractors · 74% humidity Antioch 4 contractors · 62% humidity Carlsbad 18 contractors · 76% humidity Downey 7 contractors · 66% humidity Murrieta 13 contractors · 62% humidity Costa Mesa 19 contractors · 77% humidity San Buenaventura (Ventura) 6 contractors · 75% humidity Temecula 5 contractors · 64% humidity Santa Maria 14 contractors · 71% humidity El Monte 8 contractors · 63% humidity West Covina 17 contractors · 61% humidity Inglewood 8 contractors · 67% humidity Burbank 17 contractors · 57% humidity El Cajon 20 contractors · 66% humidity Jurupa Valley 7 contractors · 56% humidity San Mateo 6 contractors · 77% humidity Rialto 6 contractors · 52% humidity Menifee 7 contractors · 56% humidity Daly City 11 contractors · 82% humidity Chico 10 contractors · 49% humidity Norwalk 10 contractors · 64% humidity Vacaville 4 contractors · 62% humidity Hesperia 3 contractors · 43% humidity Vista 10 contractors · 73% humidity Arden-Arcade 8 contractors · 61% humidity Compton 16 contractors · 70% humidity Carson 12 contractors · 70% humidity San Marcos 5 contractors · 70% humidity Redding 7 contractors · 52% humidity Mission Viejo 7 contractors · 67% humidity South Gate 8 contractors · 65% humidity Santa Monica 16 contractors · 67% humidity Chino 19 contractors · 58% humidity Westminster 4 contractors · 68% humidity San Leandro 8 contractors · 77% humidity Hemet 19 contractors · 53% humidity Indio 15 contractors · 26% humidity Santa Barbara 16 contractors · 60% humidity Merced 6 contractors · 55% humidity Livermore 3 contractors · 67% humidity Citrus Heights 10 contractors · 60% humidity Hawthorne 15 contractors · 73% humidity Whittier 10 contractors · 64% humidity San Ramon 5 contractors · 72% humidity Lake Forest 9 contractors · 64% humidity Newport Beach 4 contractors · 77% humidity Manteca 5 contractors · 59% humidity Buena Park 12 contractors · 65% humidity Redwood City 7 contractors · 72% humidity Alhambra 13 contractors · 62% humidity Mountain View 5 contractors · 71% humidity Lakewood 4 contractors · 67% humidity Folsom 6 contractors · 62% humidity Napa 9 contractors · 70% humidity Rancho Cordova 4 contractors · 62% humidity Milpitas 13 contractors · 70% humidity Perris 4 contractors · 53% humidity Upland 4 contractors · 58% humidity Pleasanton 4 contractors · 70% humidity Bellflower 22 contractors · 67% humidity Chino Hills 9 contractors · 62% humidity Carmichael 8 contractors · 61% humidity Alameda 3 contractors · 77% humidity Pittsburg 5 contractors · 67% humidity Apple Valley 17 contractors · 38% humidity

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Cost estimates based on EPA guidance, IICRC S520 standards, and regional contractor market data. MoldGuide is a lead referral service and does not provide remediation services or guarantee any quoted price.