This page lists licensed or relevant well drillers serving Marin, California. It includes contractor names, contact information, service areas, maps, FAQs, and links to related city and driller pages. This page currently includes 11 contractor listings.

Well Drillers in Marin County, California

Marin County, just north of the Golden Gate, includes both suburban communities and rural areas in West Marin. Private wells are common in the coastal and agricultural areas of Point Reyes, Tomales, Nicasio, and western San Geronimo Valley.

Licensed Contractors

11

Avg. Well Depth

~200 ft

County Seat

San Rafael

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Drillers servicing Marin County

ALTAMONT WATER WELL AND PUMP

PLEASANTON, CA
(925) 980 1066
Services your area
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AMERICAN CONSTRUCTION AND SUPPLY INC

CORTE MADERA, CA
(415) 927 2024
Services your area
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CLEAR HEART DRILLING INC

SANTA ROSA, CA
(707) 568 6095
Services your area
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FISCH BROS DRILLING

SEBASTOPOL, CA
(707) 823 3891
Services your area
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IRWIN WELL DRILLING INC

FULTON, CA
(707) 303 5984
Services your area
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JERRY AND DON'S YAGER PUMP AND WELL SERVICE

PETALUMA, CA
(707) 762 1473
Services your area
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KOENIG DRILLING

COTATI, CA
(707) 888 9617
Services your area
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OASIS PUMP & DRILLING

PETALUMA, CA
(707) 762 4028
Services your area
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PACIFIC COAST WELL & PUMP INC

SAN RAMON, CA
(510) 581 6000
Services your area
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R W R CONSTRUCTION INC

SAN RAFAEL, CA
(415) 457 5658
Services your area
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WEEKS DRILLING AND PUMP CO

SEBASTOPOL, CA
(707) 823 3184
Services your area
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Find Well Drillers by City in Marin County

San Rafael

Pop. 61,561

Novato

Pop. 55,202

Well Drilling Permits in Marin County

Marin County Environmental Health Services issues well permits. Coastal zone and agricultural land-use designations may add permit requirements. Setback distances from septic systems and surface water are strictly enforced.

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 Marin County

Marin's geology is dominated by Franciscan Complex rocks with limited fracture-based aquifers. Coastal terraces and small alluvial valleys provide the most productive well sites. Well yields tend to be low, and water conservation is essential.

Well Guides & Resources

Research well drilling before hiring. Our guides cover costs, permits, depth, and timelines.

Frequently Asked Questions About Well Drilling in Marin County

Do I need a permit to drill a well in Marin County?
Yes, a well permit is required before any drilling can begin in Marin County. Marin County Environmental Health Services issues well permits. Coastal zone and agricultural land-use designations may add permit requirements. Setback distances from septic systems and surface water are strictly enforced. 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 Marin County?
Well drilling costs in Marin County typically range from $15,000 to $50,000 or more, depending on depth, geological conditions, and site accessibility. Average well depths in the area are around 200 feet. 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 Marin County?
Wells in Marin County average around 200 feet deep, though actual depth varies with location, geology, and intended use. Marin's geology is dominated by Franciscan Complex rocks with limited fracture-based aquifers. Coastal terraces and small alluvial valleys provide the most productive well sites. Well yields tend to be low, and water conservation is essential.
How do I find a licensed well driller in Marin County?
You can browse our directory of verified C-57 licensed well drilling contractors serving Marin 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 Marin County?
Water quality from private wells in Marin County depends on local geology and land use. It is recommended that you test your well water annually for bacteria, nitrates, and other contaminants. Marin County Environmental Health can provide guidance on recommended testing. California does not regulate private well water quality, so testing is the homeowner's responsibility.

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