Mold remediation companies in California

San Diego, CA / 4.8 rating from 5245 reviews / Water damage restoration service

Best for: San Diego County homeowners dealing with mold after a plumbing leak or flood who want one company to handle water damage, remediation, and the plumbing repair under the same roof.

Service area: Headquartered in San Diego, California (Sky Park Court, 92123). Serves San Diego County including Alpine, Carlsbad, Chula Vista, Coronado, El Cajon, Encinitas, Escondido, La Jolla, La Mesa, Lakeside, National City, Oceanside, Poway, Rancho Santa Fe, Santee, Spring Valley, and Vista. They also list a Las Vegas presence on their website, though the mold and restoration services appear focused on San Diego County.

Review snapshot: Rob A., JJ, and Shayla draw consistent praise for responsiveness and clear communication, but pricing complaints recur — 28 one-star reviews across 5,245 total at 4.8 stars, with several reviewers citing unexpected charges or upselling.

Burlingame, CA / 4.6 rating from 2654 reviews / Water damage restoration service

Best for: Bay Area homeowners dealing with water damage or mold who want a large-scale operation with 75 years of history and insurance company relationships already in place.

Service area: COIT's Bay Area office operates from Burlingame, California. They serve San Francisco, the Peninsula, South Bay, East Bay, and North Bay communities. As a national franchise, they list locations across the U.S., but the Bay Area operation is the corporate headquarters with direct oversight. For jobs outside the immediate Peninsula and South Bay corridor, confirm technician availability and expected response times.

Review snapshot: Martin, Troy, and Fabian draw repeat requests for carpet work, and techs like Josue and Tony get praised by name. But 26 complaints across 2,654 reviews at 4.6★ center on final prices landing well above phone quotes.

Concord, CA / 4.8 rating from 2543 reviews / Water damage restoration service

Best for: East Bay homeowners dealing with water damage that has turned into a mold problem, where having plumbing repair and remediation handled by one crew under one call matters more than mold-specific depth.

Service area: Headquartered at 3500 Clayton Rd, Suite 113, Concord, CA. Serves Alameda, Contra Costa, and San Joaquin counties, including San Pablo, San Leandro, San Ramon, Dublin, Livermore, Tracy, Oakland, Alameda, Fremont, Union City, Hayward, Albany, Berkeley, Castro Valley, and San Lorenzo. Three-county coverage is broad for a single office — confirm response times for locations far from Concord.

Review snapshot: Roni, Logan, and Chris draw repeat praise for fast fixes and clear explanations. But pricing complaints dominate the negatives — 10 one-star reviews across 2,543 total at 4.8 stars, with multiple reviewers citing sticker shock on routine jobs.

Ontario, CA / 4.8 rating from 1381 reviews / Water damage restoration service

Best for: Ontario and Inland Empire homeowners dealing with water damage that led to mold, who want one company to handle plumbing repair, water extraction, and mold remediation under a single call.

Service area: Headquartered in Ontario, California. The Ontario branch lists specific cities including Ontario, Chino, Claremont, La Verne, Mira Loma, Montclair, and Upland. The broader Anaheim metro service area page lists coverage across four counties — Orange, Los Angeles, San Bernardino, and Riverside — with dozens of cities from Aliso Viejo to Yorba Linda. That is a very large territory for a single office location.

Review snapshot: Jose, Chris, and John draw consistent praise for clear communication and same-day fixes, but pricing complaints run through even 4-star reviews — 6 of 9 recent negatives mention overcharging or sticker shock across 1,381 total reviews at 4.8 stars.

Santa Clara, CA / 4.8 rating from 1065 reviews / Water damage restoration service

Best for: Santa Clara homeowners dealing with water damage from slab leaks or sewer backups who need same-day plumbing repair and water cleanup from a single company with 24/7 availability.

Service area: Headquartered in Santa Clara, CA at 2078 Walsh Ave. The website claims coverage across Santa Clara, Santa Cruz, San Mateo, San Benito, and San Francisco counties, including Campbell, Saratoga, and Cambrian Park. Five-county coverage from a single location is a broad claim — expect faster response times within the immediate Santa Clara and San Jose metro area.

Review snapshot: Ricky Ronquillo draws consistent praise for fast drain work and clear explanations, with Miguel Sanchez and Aaron W also frequently named. But pricing complaints dominate the negatives — 7 of 10 recent low-star reviews cite unexpectedly high charges or upselling across 1,065 total reviews.

Aliso Viejo, CA / 4.8 rating from 1038 reviews / Water damage restoration service

Best for: South Orange County homeowners dealing with water damage who want plumbing repair and mold cleanup handled by one company in a single call, with 24/7 dispatch from the Aliso Viejo office.

Service area: Headquartered in Aliso Viejo, California at 85 Argonaut, Suite 203. The website names specific service cities including Laguna Beach, San Juan Capistrano, Mission Viejo, Laguna Hills, Laguna Niguel, Laguna Woods, Lake Forest, Ladera Ranch, Rancho Santa Margarita, Coto de Caza, Dana Point, and San Clemente. The broader service area claims to cover Orange, Los Angeles, San Bernardino, and Riverside counties, which is a very wide territory for a single office location.

Review snapshot: Jeff, Keith, and Belinda draw repeat praise for fast, clear communication across 1,038 reviews. But 7 recent 1-star reviews describe pricing frustration and aggressive upselling, with one reviewer reporting a $16,000 recommendation later deemed unnecessary by another plumber.

Inglewood, CA / 4.8 rating from 876 reviews / Water damage restoration service

Best for: Inglewood homeowners dealing with water damage that led to mold growth, where having one company handle plumbing repair, water extraction, and mold work under a single dispatch saves time during an emergency.

Service area: Headquartered at 925 W Hyde Park Blvd, Inglewood, CA 90302. The website names specific communities including Del Aire, El Segundo, Hawthorne, Ladera Heights, Lennox, View Park-Windsor Hills, and Westmont. The location also claims to serve the entire Los Angeles metro area across Los Angeles County, which is a broad claim for a single franchise office — confirm response times for addresses outside the immediate Inglewood corridor.

Review snapshot: Josh, Jaime, and Matthew draw repeated praise for fast same-day fixes and clear explanations. But one reviewer paid $600 for an unresolved clog and then faced a $15,000 upsell — 4 one-star reviews across 876 total at 4.8 stars.

Sunnyvale, CA / 4.8 rating from 807 reviews / Water damage restoration service

Best for: Sunnyvale homeowners dealing with water damage from pipe failures or slab leaks who want plumbing repair and mold remediation handled by one company on a 24/7 basis.

Service area: Headquartered in Sunnyvale, California at 510 Lawrence Expressway. The branch lists coverage across five counties: Santa Clara, Santa Cruz, San Mateo, San Benito, and San Francisco. Nearby cities served include Cupertino, Los Altos, Mountain View, Campbell, Milpitas, San Jose, Palo Alto, and Redwood City. The five-county claim is broad — confirm that mold remediation crews specifically serve your location.

Review snapshot: Michael Camacho draws repeat praise for persistence on tough drain and leak jobs, and Ruben and Theo get high marks for skill and communication. But pricing is the dominant complaint — 7 of 9 recent negatives cite charges customers considered excessive, across 807 reviews at 4.8 stars.

Glendale, CA / 4.9 rating from 741 reviews / Water damage restoration service

Best for: Glendale and La Crescenta homeowners dealing with water damage that has led to mold, who want one company to handle plumbing repair, water extraction, and mold cleanup under a single dispatch.

Service area: Roto-Rooter Glendale operates from 201 N Brand Blvd in Glendale, CA and lists Glendale, La Crescenta-Montrose, and La Canada Flintridge as its primary service communities. The broader LA North service area page lists dozens of cities across Los Angeles County, from Malibu to Long Beach to Woodland Hills. For mold and water damage work, confirm that the Glendale branch specifically will handle your job.

Review snapshot: DJ draws the most praise across dozens of reviews for clear communication and fast fixes, with Noah and Noe also named repeatedly. But 3 one-star reviews across 741 total flag a repeat-clog callback dispute and a cleanup crew leaving hazardous sludge on a driveway.

Van Nuys, CA / 4.9 rating from 622 reviews / Water damage restoration service

Best for: San Fernando Valley and greater LA homeowners dealing with water damage who want a family-owned restoration company with 24/7 response, multiple local offices, and financing options.

Service area: Headquartered in Van Nuys, CA, with additional offices in Glendale, Los Angeles (Cahuenga Blvd), Gardena, and Placentia in California, plus Las Vegas, NV, and Hilliard, OH (near Columbus). The California service area covers the San Fernando Valley, greater Los Angeles, and the South Bay, listing 35+ specific cities from Malibu to Long Beach to Simi Valley. Nevada coverage includes Las Vegas, Henderson, and surrounding areas. Ohio coverage spans Columbus and surrounding cities. The three-state footprint is unusually broad for a family-owned operation.

Review snapshot: Eddie, Roberto, and Artur draw consistent praise for clear explanations and same-day response, but 6 one-star reviews across 622 total flag aggressive pricing and high-pressure sales tactics from field reps.

Eureka, CA / 4.7 rating from 618 reviews / Water damage restoration service

Best for: Humboldt County homeowners dealing with mold after plumbing failures or flooding who want one company to fix the leak and handle remediation under one roof.

Service area: Headquartered in Eureka, California at 605 Harris St. Covers all of Humboldt County including Arcata, Fortuna, McKinleyville, Garberville, Trinidad, Willow Creek, Ferndale, Rio Dell, Blue Lake, and about 25 other communities. One reviewer was quoted a $586 travel fee from Eureka to Garberville (about 65 miles south), so outlying areas carry significant surcharges.

Review snapshot: Chris, Anton, and Josh draw consistent praise for speed and clear communication across 618 reviews. But pricing dominates complaints — reviewers report rates two to three times local independents, with 18 one-star reviews in 18 months.

Fountain Valley, CA / 5 rating from 583 reviews / Water damage restoration service

Best for: Fountain Valley and north Orange County homeowners dealing with water damage that has turned into mold, backed by a franchise with a 5.0 Google rating across 583 reviews.

Service area: Headquartered in Fountain Valley, California. Reviews confirm regular service in Fountain Valley, Huntington Beach, Costa Mesa, Newport Beach, Anaheim, Santa Ana, and West Covina. At least one reviewer was located in Hemet, roughly 80 miles southeast, suggesting the service area may extend well beyond the immediate Fountain Valley area.

Review snapshot: Oscar, Jose, and Bayron draw consistent praise for punctuality and clear explanations across dozens of recent reviews. But 1 reviewer out of 583 at 5.0 stars described unauthorized demolition and a worker who misrepresented insurance approval status.