Hiring an excavation contractor in California
Gradeline lists 1,925 excavating and site work contractors in California across 57 counties. This guide covers the California rules that affect a dig: licensing, frost depth and 811 notice through USANorth / California 811.
What to know before you hire in California
4.5★
Know what a good rating looks like here
California contractors average 4.5 stars on Google. Shortlist crews at 4.5 or better with a solid review count (181 qualify), and treat anything under 4.0 as a red flag.
Yes
Check the state license
California requires a contractor license (CA C-12 (Earthwork and Paving)), issued by California Contractors State License Board. Get the number in writing before you sign. Verify a license
18 in
Footings go below the frost line
Frost reaches about 18 inches in California. Any bid for footings, foundations, or buried lines should dig at least that deep. If the depth is not written in the quote, ask.
2 days
Utilities get marked before digging
California law requires 2 business days notice to USANorth / California 811 before any digging. Ask whether your contractor files the request, and plan the start date around the wait.
1983
Older homes need a drainage check
The median California home was built around 1983. Older lots often have failing drainage or undersized footings, so ask your contractor to look at grading and water flow while they are on site.
31%
Most listed contractors have no website
Only 31% of listed California contractors run their own site. Judge them on reviews, photos, and years in business rather than web polish, and get at least three written quotes.
Get quotes from California contractors in one request.
Get free quotesArea-specific FAQ
How far in advance do I need to call before digging in California?
At least 2 working days. USANorth / California 811 takes locate requests statewide and has underground utilities marked before any excavation. Hitting an unmarked gas or power line can injure the crew and lead to costly repairs.
Do excavation contractors need to be licensed in California?
Yes. California requires a state contractor license (CA C-12 (Earthwork and Paving)) for this work, regulated by California Contractors State License Board. Look up the license number before you sign a contract.
How deep do footings need to be in California?
In California, footings typically need to extend below the frost line, which is around 18 inches here. A local contractor will confirm the code requirement for your site.
When is the best time of year to dig in California?
Most of the year works in California. Occasional winter freezes can firm up the top few inches of soil, but the 18-inch frost line clears quickly.
How busy is excavation work in California?
About 6,807 residential building permits were issued statewide in 2025. Most new homes need clearing, grading, and utility trenching before construction starts.
