Blog · October 14, 2026 · California
The Sausalito GIS Map and the county parcel viewer
Parcel data for Sausalito comes from the county, and the viewer is free.
Main page: Marin County, CA GIS & Parcel Viewer (official map link, county facts and neighboring maps).
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When land near Corte Madera catches your eye, the Sausalito GIS map shows the outline, the owner of record and a parcel ID. In this Sausalito guide: where that map lives, the fastest ways to search, and the limits worth knowing.
Where the Sausalito GIS map lives
A town may publish separate layers for zoning or utilities; check the Sausalito website for one.
Getting to the right map
Go first to the Marin County parcel viewer; it covers every tax parcel in the county, Tiburon included. Around Corte Madera, type a street address, an owner's name or a parcel number, then pick the result to center the map on it. For acreage around Belvedere, the parcel card usually lists the owner of record, acreage on the tax roll, a parcel ID and sometimes recent sales.
Sausalito and the county around it
Sausalito sits in Marin County, California, so its parcels are on the county's map. For a parcel near Ross, the municipality handles matters such as zoning, permits and utilities for lots inside the boundary, while the county keeps the tax map. Lots just outside the city limits toward Belvedere generally answers to county rules, not municipal ones.
Before you lean on the lines
Acreage on the record is an assessed number; just a licensed surveyor establishes the real boundary on land around Belvedere. For a tract near Ross, records update in batches, so a deed recorded last month might lag behind.
Neighboring parcel maps
Marin County borders Contra Costa County, San Francisco County, Solano County, and Sonoma County; every one of them runs a separate parcel map. A tract near the line by Ross can show up in two county records, so check the adjacent map as well. If you're looking near Ross, the Platbookmapper state page lists each bordering county map for California.
Finding the right lot
Addresses are the easiest route inside Sausalito; owner search often wants the surname first. In and around Larkspur, a parcel ID is the most reliable search, and it's printed on tax bills.
Getting your bearings
San Rafael serves as the county seat, home to the main records offices. Other places on the map include Belvedere, Tiburon, Mill Valley, and Corte Madera. Roughly 254,407 people live in Marin County (Census Bureau estimate, 2023) spread over roughly 520 square miles. Places such as San Pablo Bay, San Francisco Bay, and Golden Gate National Recreation Area help you orient on the aerial around Larkspur.
Legal descriptions in California
California uses the Public Land Survey System, which means a tract near Corte Madera is described by section, township and range. A standard section is about one square mile, roughly 640 acres, and a township holds 36 of them, though corrections make some sections near Belvedere odd-sized. Copy the legal description from the record for the parcel near Mill Valley when you talk to a surveyor.
What the layers show
For a home near Mill Valley, layer lists often include zoning, flood zones, city limits, school districts or contours; not every viewer has them all.
Offices that can help
For assessment questions about property around Tiburon are handled by the County Assessor, the office behind the parcel record. Questions about what you can build around Belvedere go to planning, building or health offices, town or county, depending on location.
Using it on a phone
The parcel map usually runs in a mobile browser, useful out on a road near Mill Valley, so load it before you lose signal. A screenshot of the parcel near Mill Valley with its ID keeps working without signal.
What the record panel tells you
Sales history, if listed, helps with pricing near Belvedere give a rough idea of values; they're not an appraisal.
Troubleshooting the viewer
When the map won't open around Ross, switch browsers or turn off pop-up blockers; the Platbookmapper county page tracks the current link.
Printing and saving
Save a screenshot of the lot near Tiburon and its record panel, so you have it when calling an office.
Backing up the map with records
The map is an index, not the title: deeds, subdivision plats and easements covering ground around Corte Madera are filed with the County Recorder. Long-held tracts around Ross can sit on many deeds, so a title company is worth hiring before a purchase.
Quick answers
Are parcel lines on the map exact around Corte Madera?
Generally, the map near Ross isn't a survey, so a licensed surveyor should mark corners.
Can I search by owner name in Sausalito?
It depends, but the parcel record for a lot near Belvedere lists the owner of record, or search by address instead.
Is there a separate city GIS for Sausalito?
It depends, but Sausalito may publish zoning or utility maps separately; the county viewer remains the main parcel source.
Do I need an account for the parcel map near Ross?
In most cases, the Marin County parcel viewer is free and opens without a login.
How is land described in California deeds around Belvedere?
If you're looking near Tiburon, deeds use lot and block, metes and bounds or survey descriptions, and the parcel record often summarizes it.
Open the official Marin County, CA parcel map See it in the Platbookmapper directory
Not a survey. County GIS and tax parcel maps are assessment and planning layers. They are not a substitute for a recorded plat, deed, or licensed survey, especially for fences, setbacks, or boundary disputes.