Parcel + jurisdiction
Confirm APN, acreage, zoning, General Plan designation and whether the property is unincorporated.
West Petaluma + Country · Property research
West Petaluma + Country property research.
For country property, the address and APN are the starting point. Permit Sonoma can surface zoning, land use, permit history, groundwater, fire severity, floodplain, soils, septic context, school district and Williamson Act information.
Due diligence
What to check, and in what order.
Water + wastewater
Review well records, groundwater context, septic documentation and any sanitation district connection.
Access + hazards
Check legal and physical access, fire response, vegetation, flood, soils, landslide and liquefaction layers.
Improvements + use
Reconcile homes, additions and outbuildings with permits; verify agricultural, residential or commercial uses before relying on them.
Official tools
Where the records live.
Permit Sonoma parcel and permit search
Use this source for current parcel, planning or hazard context, then confirm material conclusions with the responsible agency.
Open source (opens in a new tab)Sonoma County 2025 fire-hazard layer
Use this source for current parcel, planning or hazard context, then confirm material conclusions with the responsible agency.
Open source (opens in a new tab)Sonoma County General Plan
Use this source for current parcel, planning or hazard context, then confirm material conclusions with the responsible agency.
Open source (opens in a new tab)Owning here
Budget for the systems, not just the house.
Insurance, utilities, drainage, vegetation, access, maintenance and taxes all change what a property costs to own. Worth identifying early rather than after closing.
Online maps are screening tools. They are not surveys, title reports, permit approvals, engineering opinions or insurance commitments.
Related library
Continue with the property questions.
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Own property in West Petaluma + Country?
Area context only goes so far. The particulars of one property are a conversation, and a free custom valuation is a practical place to start it.