California Water Well Permits Guide

Well permits are required before drilling in California. Requirements vary by county. This guide explains when permits apply, how to work with local agencies, and what to ask before hiring a driller.

When Permits May Be Required

A permit is required for new well construction, well modification (e.g., deepening, repair), and well destruction or abandonment. This applies to domestic, agricultural, and commercial wells. The California Water Code and local county ordinances govern the process. Drilling without a permit can result in fines and may require costly remediation.

County and Local Variation

Each county has its own permit application process. Fees, review times, and additional requirements (e.g., groundwater sustainability plans, environmental review) vary. Counties in agricultural regions often have well-established processes. Contact your county Environmental Health or Public Works department for current requirements.

Working with Local Agencies

Submit applications according to county instructions. Some counties accept online applications; others require paper submissions. A licensed C-57 contractor familiar with your county can help navigate the process and ensure the application meets local standards. Allow time for review—permits may take several weeks depending on the county.

Questions to Ask Before Hiring

Ask whether the contractor will handle the permit application or if you need to apply separately. Confirm their C-57 license is active and in good standing. Ask about typical permit timelines in your county and whether drilling can begin as soon as the permit is approved.

Find Local Drillers

Search our directory of licensed C-57 contractors by county or city and ZIP. For more detail, see our California well permit guide blog post.

Frequently Asked Questions

Do I need a permit to drill a well in California?
Yes. A well permit is required before any drilling, modification, or destruction of a water well in California. Permit applications are typically handled by county Environmental Health or Public Works departments. Your licensed C-57 contractor can often assist with the permit process.
Do permit requirements vary by county?
Yes. Counties have different application forms, fees, and review timelines. Some counties have additional requirements for groundwater management or environmental review. Contact your county Environmental Health department for local specifics.
Can I apply for a well permit myself?
In most counties, the property owner or a licensed C-57 contractor can apply. Many drillers handle permit applications as part of their service. Check with your county for their preferred process and required documentation.

Find a Licensed Well Driller

Search our directory of California-licensed C-57 well drilling contractors. Get quotes from multiple drillers before choosing.

Search DirectoryKern County drillersFresno County drillersSan Joaquin County drillersTulare County drillers