Well Drillers in San Francisco County, California

San Francisco is a densely urban city-county where private water wells are rare. However, some commercial and industrial properties maintain wells, and geotechnical drilling is common for construction projects. Residential well drilling is minimal due to the municipal water supply system.

Licensed Contractors

3

County Seat

San Francisco

Licensed C-57 Contractors in San Francisco County

CLEAR HEART DRILLING INC

Active
SANTA ROSA, CA 95401
(707) 568 6095
Expires: 2026-06-30
License #780357· Verified Active C-57Services your area
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PACIFIC COAST WELL & PUMP INC

Active
SAN RAMON, CA 94583
(510) 581 6000
Expires: 2026-07-31
License #810579· Verified Active C-57Services your area
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R W R CONSTRUCTION INC

Active
SAN RAFAEL, CA 94901
(415) 457 5658
Expires: 2027-08-31
License #527433· Verified Active C-57Services your area
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Well Drilling Permits in San Francisco County

San Francisco Department of Public Health handles well permits. Urban well construction requirements are stringent, and wells must meet specific standards for potential contamination sources. Commercial and monitoring wells are more common than domestic wells.

All well construction, modification, or destruction in California must be performed by a contractor holding a valid C-57 Well Drilling license issued by the Contractors State License Board (CSLB).

Geology & Drilling Conditions in San Francisco County

Complex urban geology includes Franciscan Complex bedrock, sand dune deposits, and bay mud. Groundwater is generally shallow but often unsuitable for domestic use without treatment due to urban contamination. The Westside Groundwater Basin is managed by the San Francisco Public Utilities Commission.

Frequently Asked Questions About Well Drilling in San Francisco County

Do I need a permit to drill a well in San Francisco County?
Yes, a well permit is required before any drilling can begin in San Francisco County. San Francisco Department of Public Health handles well permits. Urban well construction requirements are stringent, and wells must meet specific standards for potential contamination sources. Commercial and monitoring wells are more common than domestic wells. All well work must be performed by a contractor holding a valid California C-57 Well Drilling license.
How much does it cost to drill a well in San Francisco County?
Well drilling costs in San Francisco County typically range from $15,000 to $50,000 or more, depending on depth, geological conditions, and site accessibility. Getting quotes from multiple licensed C-57 contractors is the best way to estimate your specific project cost.
How deep are wells typically drilled in San Francisco County?
Well depths in San Francisco County vary significantly depending on location, geology, and the intended water use. Complex urban geology includes Franciscan Complex bedrock, sand dune deposits, and bay mud. Groundwater is generally shallow but often unsuitable for domestic use without treatment due to urban contamination. The Westside Groundwater Basin is managed by the San Francisco Public Utilities Commission. A local licensed driller can provide a depth estimate for your specific property.
How do I find a licensed well driller in San Francisco County?
You can browse our directory of verified C-57 licensed well drilling contractors serving San Francisco County right on this page. Every contractor listed holds a valid California C-57 Well Drilling license verified through the Contractors State License Board (CSLB). We recommend contacting multiple drillers for quotes and checking their license status before hiring.
What should I know about water quality from a well in San Francisco County?
Water quality from private wells in San Francisco County depends on local geology and land use. It is recommended that you test your well water annually for bacteria, nitrates, and other contaminants. San Francisco County Environmental Health can provide guidance on recommended testing. California does not regulate private well water quality, so testing is the homeowner's responsibility.

Nearby Counties

San Mateo County

Bay Area

Marin County

Bay Area

Alameda County

Bay Area