New plans for the property? Start with the right local office.

A new barn, added living space or a change in how you use your land deserves a records check before a construction estimate. Start with a short description of the work and the parcel number.

Well work

California DWR identifies local cities, counties and water agencies as the authorities for well construction, alteration and destruction. Use its directory to locate your enforcing agency and ask which ordinance and application requirements apply.

Septic work

California’s onsite wastewater framework includes local agency management programs. Ask the local environmental health office which program governs your parcel and how your proposed work affects system evaluation, capacity, setbacks and permitting. A statewide overview alone does not establish approval for a particular project.

Keep a dated decision file

• Describe existing structures, current use and proposed changes.
• Request available permit history and approved plans.
• Record the agency, staff contact, response date and documents provided.
• Ask whether any recently adopted or upcoming change affects your application.
• Resolve conflicting answers before commissioning a final design.

Use these guides as a starting point for Solano, Yolo, Alameda, Contra Costa, San Joaquin and Stanislaus searches. Requirements must be confirmed with the office responsible for each property.

Official sources & next steps

• California DWR · Well permitting agencies
• California Water Boards · Onsite wastewater policy

Checked October 2, 2026. Program funding, eligibility and local requirements can change. Confirm details with the administering agency or qualified professional before making a financial or property decision.