Find Sonoma County Property and Parcel Records

This page helps with a property search in Sonoma County, California by pointing you to the main official tools for parcel details, assessment information, maps, recent sales, zoning, land use, and permit-related parcel reports.

The Sonoma County Assessor's Office provides parcel and assessment searches, while Permit Sonoma supports parcel reports and mapping tools for land use and development questions.

Search Assessor's Parcel Information

Use the Assessor's parcel search to look up public assessment roll information, basic parcel details, value notices, and parcel maps. You can start with the search Assessor's parcel information tool.

Have one of these details ready before you search:

• Fee parcel number
• Assessment number
• Street address or the first part of the address

After you choose a search method, review the matching parcel carefully before relying on the result.

• Open the Assessor's parcel search.
• Enter the parcel number, assessment number, or street address.
• Select the matching property from the results.
• Use the parcel detail screen to review available assessment data, value notices, or maps.

For address searches, try leaving off words such as Street, Road, Drive, or Lane if the exact address does not return the property.

Assessor parcel records and maps

The Assessor's parcel information search can provide Assessor Parcel Number lookup, assessment roll data, assessed value change notices, Prop 8 notices, and Assessor parcel maps.

Current Assessor parcel maps can be viewed through the online Assessor portal by searching for the property and selecting the map option on the detail screen. Historical Assessor maps are handled through the Assessor's Office.

Assessor maps are for assessment purposes only. They are not surveys and should not be used to define property lines. Legal lot information may need to be checked through recorded deeds or official maps of record.

ParcelQuest maps and recent sales

ParcelQuest is a third-party service linked from the county's parcel information page. Use search ParcelQuest maps and recent sales when you need property detail, transaction history, recent sales, supplemental tax estimates, property reports, or Assessor parcel maps in PDF format.

ParcelQuest Lite allows parcel detail access without a fee within its stated limits. Users are limited to 50 searches and 25 parcel maps per month. Reports or document images may require purchase through ParcelQuest.

ParcelQuest maps and recent sales are not maintained or warranted by the County of Sonoma, so verify important findings before making property decisions.

Permit Sonoma parcel reports and GIS data

Use the Permit Sonoma parcel search when the property question involves parcel reports, associated addresses, county-issued permits, public documents, zoning, land use, or development-related data. Start with the search Permit Sonoma parcel reports tool.

The Permit Sonoma search accepts parcel number or address. You may also select a parcel directly on the map after zooming in until parcel outlines are visible.

• Enter an APN in the parcel number field or a physical address in the address field.
• Use the map if you need to select the outlined parcel manually.
• Review the Search Results table for the parcel number, address, and Parcel Report link.
• Open the Parcel Report to review general parcel information, associated addresses, permits, and publicly available documents.

Permit Sonoma also provides GIS tools for unincorporated areas of Sonoma County, including zoning, General Plan land use, city limits, floodplains, geologic hazards, and aerial photo layers.

Search limits and verification

Sonoma County property searches are allowed by parcel identification number and address. Searches by name are not available, and search results do not display owner name information.

Assessment roll information is current as of the most recently published Assessment Roll, and parcel maps are updated monthly. Online data may be out of date or incomplete, so validate important property, assessment, map, or permit information with the correct county office before making business, financial, project, purchase, or lease decisions.

Permit history may not include every record for a property. Address changes, parcel mergers, splits, retirements, and older status terminology can affect what appears in a parcel report.

Assessor fees for property data

The Assessor's Office offers certain non-confidential property information for a fee. Common public property data products include:

Building Records are limited to the property owner or an authorized representative and require identification and a completed authorization form.

Sonoma County property search contacts

Use these contacts when an online result is unclear, a map or parcel number needs review, or a parcel report needs staff follow-up.

• Sonoma County Assessor's Office, 585 Fiscal Drive Room 104F, Santa Rosa, CA 95403
  Phone: (707) 565-1888
  Email: assessor@sonoma-county.org
  Business hours: Monday – Tuesday 8:00 AM – 5:00 PM; Wednesday 8:00 AM – 4:00 PM; Thursday – Friday 8:00 AM – 5:00 PM
  Phone hours: Monday – Friday 9:00 AM – 4:00 PM
• Permit Sonoma, 2550 Ventura Avenue, Santa Rosa, CA 95403
  Phone: (707) 565-1900
  CA Relay Service: 711
  Email: PermitSonoma@sonomacounty.gov
  In person hours: Monday – Tuesday, Thursday – Friday 8:00 AM – 4:00 PM; Wednesday 10:30 AM – 4:00 PM