Map Information
Recorded maps are indexed pursuant to California law. They can be searched by name, book/page, recording document number, date or date range, and type of map. They are not indexed by Assessor Parcel Number (APN) or address.
The index of maps is available online at Official Public Record Copies. Map images are not available online unless purchased. Once a map is purchased, the document will be available to view and download. Check the Recorder fee schedule for current costs.
Maps from 1854 to the present are available.
Common Types of Recorded Maps
| Assessment District Map | To delineate the boundaries of a proposed or final assessment district |
| Official Map | To delineate lots or blocks in a county / city for the purpose of sale or transfer |
| Record of Survey | To delineate the survey of real property boundary lines |
| Subdivision Map / Parcel Map | To delineate the division of real property |
Other Types of Maps
The Assessor’s Office maintains Assessment Parcel Maps, which are for assessment purposes only. Click here to learn more about AP maps.
Corner Records (also called Corner Survey records) are held by the County Surveyor. Click here to learn more about Permit Sonoma and the County Surveyor.