Blog · October 14, 2026 · California
Using the Sausalito Plat Map
Lots in Sausalito trace back to recorded plats filed with the county.
Main page: Marin County, CA GIS & Parcel Viewer (official map link, county facts and neighboring maps).
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If a legal description for land in Sausalito cites a lot number, you'll need the Sausalito plat map to make sense of it. In this Sausalito guide: where plats are filed, plat versus tax map, and the details that matter to buyers.
Who keeps the Sausalito plat map
For a lot in Sausalito, look for the plat book reference on the parcel record; use it to request a copy.
Opening the official parcel viewer
Go first to the Marin County parcel viewer; it covers every assessed parcel from Belvedere to Tiburon. If you only know roughly where the land is, zoom in from Ross until the lines appear, then click inside the one you want. For a tract near Tiburon, the parcel card usually lists the owner of record, acreage on the tax roll, a parcel ID and sometimes recent sales.
A word on accuracy
Parcel lines are drawn for taxes, not surveyed, so the edge of a yard near Tiburon often sits a few yards off the line on screen. Owner names and values update on a schedule, so a fresh transfer around Belvedere may not show yet.
Metes and bounds instead
Acreage around Ross outside a subdivision is often described by metes and bounds or survey description; the deed and any recorded survey describe it instead.
Where Sausalito fits in
Sausalito lies within Marin County, California, which means parcel data comes from the county. For property near Larkspur, the municipality handles things like zoning, permits and utilities for lots inside the boundary, and the county still keeps the parcel and deed records. Lots just outside the city limits near Tiburon usually falls under county rules, not municipal ones.
Field tips
The parcel map usually runs in a mobile browser, useful out on a road near Belvedere, so load it before you lose signal. A saved image of the lot near Mill Valley and its lines keeps working without signal.
How a plat differs from the tax map
If the tax map and plat differ near Mill Valley, the recorded plat and a survey control.
Reading the plat sheet
Recorded easements around Ross stay with the land when it sells; check the plat notes and any covenants.
Neighboring parcel maps
Marin County meets Contra Costa County, San Francisco County, Solano County, and Sonoma County, and each of those keeps its own parcel map. Acreage along the edge near Ross may be split across two assessors' files, so open the neighboring map before you assume the acreage. Closer to Belvedere, our state page links every neighboring county map for California.
Replats and vacations
An amended plat may change lots around Belvedere, so check for later filings; vacated streets or alleys also get recorded.
Deeds, plats and who keeps them
The map is an index, not the title: recorded deeds, plats and easements covering ground around Mill Valley are kept by the County Recorder. For a parcel near Belvedere, have ready the instrument number shown in the record panel and the lookup takes minutes.
Requesting the plat
Around Mill Valley, many recorder offices offer an online index, while others require a visit or a request; small fees are common.
Places you'll see on the map
San Rafael serves as the county seat, where most land records are kept. You'll also find Belvedere, Tiburon, Mill Valley, and Corte Madera, each with its own cluster of lots. Around 254,407 people live in Marin County (Census Bureau estimate, 2023) spread over some 520 square miles. Places such as San Pablo Bay, San Francisco Bay, and Golden Gate National Recreation Area make handy reference points on the map near Belvedere.
Who handles what
For assessment questions about property around Belvedere are handled by the County Assessor, since that office keeps the assessment data. Questions about what you can build around Ross are for the local planning and health departments, and the answer depends on jurisdiction.
Sections, lots and bearings
California is laid out under the Public Land Survey System, so rural legal descriptions near Belvedere cite section, township and range. A standard section is about one square mile, roughly 640 acres, with 36 sections to a township, though real sections near Ross vary in size. Write down the legal description for the tract near Tiburon before you request a deed or survey.
Quick answers
Is a plat map a survey near Ross?
For land near Tiburon, GIS parcels are tax drawings, and the recorded plat is the legal document; trust the plat when they differ.
Do easements show on the plat near Larkspur?
Out toward Ross, recorded plat easements usually show on the sheet; ask planning staff if unsure.
How do I get a copy of a plat in Sausalito?
For most people, recorded plats near Corte Madera are filed with the County Recorder; small copy fees are common.
What is a replat in Sausalito?
In most cases, combining or splitting lots near Tiburon usually needs a recorded plat change, often with a surveyor's drawing.
How is land described in California deeds near Tiburon?
For a parcel near Belvedere, 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.