Property lines in Marin County
See the shape and size of a parcel and where it meets the neighbors.
County GIS map
- Marin County GIS and mappingThe mapping office: what maps and data are kept, how to get them, and who to ask.
Marin County
Surveys and section corners
- NGS survey mark and benchmark mapMap of National Geodetic Survey benchmarks and survey control marks. Zoom to a place, click a mark and open its datasheet with the mark's position, elevation a…
National What is this?
- California licensed land surveyor lookupSearch the California Board for Professional Engineers, Land Surveyors, and Geologists for a licensed land surveyor by name or license number. Only a licensed …
Statewide What is this?
- BLM General Land Office RecordsSearch original federal land patents and survey plats by name or legal description to find the first private owner of a parcel.
National What is this?
- NGS Survey Mark DatasheetsFederal survey mark datasheets and control monument records, searchable by county or coordinates.
National What is this?
Who to ask
- Marin County GISMapping and GIS data.
- Phone
- 415-473-7453
- Website
- Visit website
- Marin County RecorderThe Marin County Recorder, part of the Assessor-Recorder-County Clerk, records deeds and keeps the official records index.
- Phone
- (415) 473-6092
- Address
- 3501 Civic Center Drive, Suite 232, San Rafael, CA 94903
- Website
- Visit website
Guide: A parcel map is not a survey
About property lines
Property lines on a map come from the county parcel layer, which is drawn from deeds and surveys but is not a survey itself. It is accurate enough to see the shape and rough size of a lot and which neighbors touch it. Only a licensed surveyor can mark a legal boundary on the ground.