Commercial Large-Loss Restoration in California
74 certified commercial firms on file in California. Credentials below are verified against IICRC's Certified Firm registry.
Cities with 3+ certified firms
Also served (1–2 firms)
Anaheim, Bakersfield, Irvine, North Hollywood, Livermore, Santa Clarita, San Jose, Canoga Park, Camarillo, Arcadia, Burbank, Chula Vista, Castroville, City Of Industry, Clovis, Encino, Corona Del Mar, Cerritos, Chico, Anderson, Alhambra, Lake Arrowhead, Glendora, Gardena, Escondido, Lincoln, Modesto, Montebello, Lancaster, Murrieta, Northridge, Palo Alto, Orangevale, Panorama City, Poway, Redding, Lake Forest, San Juan Capistrano, San Leandro, Santa Ana
What California commercial firms are certified in
Certification counts across the 74 California firms on file for this work. These are the credentials on record with the issuing body — not what the firms advertise.
| Credential | What it covers | California firms |
|---|---|---|
| CDS | Commercial Drying Specialist | 74 |
| WRT | Water Damage Restoration Technician | 74 |
| FSRT | Fire and Smoke Damage Restoration Technician | 70 |
| ASD | Applied Structural Drying Technician | 69 |
| AMRT | Applied Microbial Remediation Technician | 68 |
| OCT | Odor Control Technician | 56 |
74 of these firms hold three or more certifications; 3 appear in two independent registries and carry a cross-verified marker; 33 operate under a national franchise brand, which is separately owned and separately credentialled from the brand itself.
Every California firm we hold a record for, A–Z by city →
Commercial in California: common questions
Is commercial work licensed in California?
No US state licenses commercial work specifically. General contractor registration may apply to any rebuild that follows. The checkable credential is IICRC certification, which is what every listing on this page is verified against.
What certifications do California commercial firms actually hold?
Across the 74 California firms on file for this work, the most common credentials are CDS (Commercial Drying Specialist) held by 74 firms, WRT (Water Damage Restoration Technician) held by 74 firms, FSRT (Fire and Smoke Damage Restoration Technician) held by 70 firms, ASD (Applied Structural Drying Technician) held by 69 firms. 74 hold three or more certifications. Certification describes verified training rather than the services a firm chooses to advertise.
How were these California firms verified?
Every certification was checked against IICRC's own Certified Firm registry, not against the firm's marketing. 3 of the 74 appear in two independent registries and carry a cross-verified marker. Checked August 14, 2026.
Which California cities have the most commercial firms?
Sacramento leads with 5, followed by Riverside (3), San Diego (3), Simi Valley (3). We build a page wherever a city has three or more certified firms; smaller markets are listed below that without their own page.