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Licensed trenching only contractors in Southern California
Every CSLB D-56 license with a business address in Los Angeles, Orange, San Diego, Riverside or San Bernardino County, from CSLB data updated 10/22/2026.
By county
Riverside County has the most, 28 of 79 (35.4%).
| County | Licenses | Active | Share of SoCal |
|---|---|---|---|
| Riverside County | 28 | 26 | 35.4% |
| Los Angeles County | 15 | 14 | 19.0% |
| San Bernardino County | 13 | 13 | 16.5% |
| Orange County | 12 | 12 | 15.2% |
| San Diego County | 11 | 10 | 13.9% |
Trenching Only (D-56) by city
- Riverside 7
- Orange 4
- Perris 4
- Hesperia 4
- Corona 3
- Yucaipa 3
- Long Beach 2
- Costa Mesa 2
- Moreno Valley 2
- Palm Desert 2
- Spring Valley 2
- Murrieta 2
- Newport Beach 2
- Rancho Cucamonga 2
- Torrance 2
- La Mesa 2
- Lake Elsinore 2
- Huntington Beach 2
- Eastvale 2
- Cypress 1
- Anaheim 1
- Hemet 1
- Escondido 1
- Chino Hills 1
- La Verne 1
- Tujunga 1
- Palmdale 1
- Thousand Palms 1
- Chatsworth 1
- Santee 1
- Newhall 1
- Fontana 1
- Yucca Valley 1
- Grand Terrace 1
- Oceanside 1
- Mira Loma 1
- Poway 1
- Alhambra 1
- Chula Vista 1
- Los Angeles 1
- North Hollywood 1
- Cathedral City 1
- Ramona 1
- Lakewood 1
- Valley Center 1
No new licenses for Trenching Only (D-56) across SoCal
None issued Oct 16 – Oct 22, 2026.
Quick facts
How many licensed trenching only contractors are in Southern California?
79 trenching only contractors with a California CSLB license list a business address in Southern California. 75 of them have an active license in good standing (CSLB data as of 10/22/2026).
How many trenching only contractors in Southern California have a license problem right now?
4 are not in good standing right now, including 2 suspended for missing workers' comp. 5 active licenses expire within 90 days. Each county and city list linked here shows the status and a plain-English OK-to-hire verdict.
How do I check if a trenching only contractor is licensed?
Search the business name or license number on LicenseWatch CA to see license status, bond and workers' comp in one place, then confirm on the CSLB website before you sign a contract. In California, work over $1,000 in labor and materials requires a licensed contractor.
New and lapsed SoCal licenses, every Monday
New licenses, expirations and workers' comp lapses across five counties. One short email a week.