Sonoma County property data
189,233 properties in Sonoma County, California are on the live map, 11,626 of them carrying linked permit, violation, sale, or event records. These are the map's own served counts — the same numbers any visitor can verify by opening the county on the map.
Coverage in Sonoma County
Parcel layer is live; record linkage for this county is still being built out. Every property sits on the owned county parcel layer; linked records draw from building permits, code violations, complaints, deeds and sales, assessments, and certificates of occupancy where the county and its cities publish them. Coverage grows continuously — counts on this page refresh with the map pipeline. How records attach to parcels, including published per-county match rates, is documented on the data quality page and the methodology page.
Look up a single property
Any address in Sonoma County can be opened as a free property report — permits, violations, sales, and parcel facts for that one property — on the property report page, or browsed visually on the live map.