Blog · October 14, 2026 · California
Using the Fairfax GIS Map
Most property questions near Corte Madera start with a parcel lookup.
Main page: Marin County, CA GIS & Parcel Viewer (official map link, county facts and neighboring maps).
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Looking for lot lines and acreage around Belvedere? Pulling up the Fairfax GIS map gets you there fast, with no account needed. Covered here for Fairfax: which viewer to open, the fastest ways to search, and what to double-check with records.
Where the Fairfax GIS map lives
In most places the county maintains the parcel layer, and for the town that means the, at least around Belvedere.Marin County parcel viewer.
Where the parcel data lives
Go first to the Marin County parcel viewer; it covers every assessed parcel in the county, Belvedere included. Closer to Larkspur, type a street address, an owner's name or a parcel number, and the matching parcel lights up. On ground around Larkspur, write down the parcel ID while you have it open; every clerk in the county asks for it first.
Troubleshooting the viewer
If the viewer stalls on a phone near Corte Madera, switch browsers or turn off pop-up blockers; links occasionally change, and our directory page keeps the current one.
Limits of the parcel data
Acreage on the record is an assessed number; only a licensed surveyor sets the real lines on land around Mill Valley. Around Corte Madera, records update in batches, so a deed recorded last month might lag behind.
Taking the map into the field
Most viewers work in a phone browser, useful out on a road near Novato, but coverage can be spotty out of town. A printout of the tract near Novato keeps working without signal.
Fairfax, CA: the basics
The town is part of Marin County, California, so its parcels are on the county's map, at least around San Rafael. If you're looking near San Rafael, city or town hall handles things like zoning, permits and utilities within town limits, while the county keeps the tax map. Acreage past the city limits near San Rafael usually falls under county rules instead.
Three ways to find a parcel
For a house in Fairfax, search the street address; for owner searches, try last name first. Around San Rafael, a parcel ID is the most reliable search, and it's printed on tax bills.
The paper trail behind a parcel
In and around Mill Valley, the map is an index, not the title: deeds, plats and easements for parcels in the county are kept by the County Recorder. Around Corte Madera, have ready the instrument number listed on the parcel record to skip a name search.
Layers worth turning on
For a tract near Mill Valley, layer lists often include municipal boundaries, floodplain and sometimes zoning; availability varies.
Marin County in a few facts
San Rafael holds the county offices, which is where the courthouse records live. Smaller places on the map include Belvedere, Corte Madera, and Larkspur, where town lots give way to larger tracts. About 254,407 people call Marin County home (Census Bureau estimate, 2023) across roughly 520 square miles. Landmarks such as San Pablo Bay, San Francisco Bay, and Golden Gate National Recreation Area are easy to spot when you zoom out from San Rafael.
Sections, lots and bearings
California uses the Public Land Survey System, so rural legal descriptions near San Rafael 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 San Rafael vary in size. Keep the legal description for land near Mill Valley when you talk to a surveyor.
Offices that can help
Deeds, mortgages and recorded plats for land near Novato come from the County Recorder, sometimes only in person. Questions about what you can build around Mill Valley are for the local planning and health departments, town or county, depending on location.
Printing and saving
Save a screenshot of the lot near Mill Valley and its record panel, which helps later when you ask the assessor or a title company.
Owner, value and acreage
If sale dates appear, they help gauge the market in Fairfax are a useful starting point; they're not an appraisal.
Neighboring parcel maps
Marin County touches Contra Costa County, San Francisco County, Solano County, and Sonoma County, and each of those keeps its own parcel map. Ground near Belvedere that runs to the line can show up across two assessors' files, so look at the adjacent map too. For property near Belvedere, our state page lists every neighboring county map for California.
Quick answers
Does the Fairfax parcel viewer cost anything?
Good question; the county viewer covering Fairfax needs no account; some sites ask you to accept a disclaimer.
Can I search by owner name in Fairfax?
Short answer: the parcel record for a lot near Larkspur lists the owner of record, or search by address instead.
Does the map show city limits for Fairfax?
For land near San Rafael, many viewers offer aerial imagery plus layers like city limits, zoning or flood zones; open the layer list to see what's there.
Are parcel lines on the map exact near Novato?
In most cases, the map near Larkspur isn't a survey; get a survey before a fence.
Why do offices ask for the parcel ID in Fairfax?
Every office uses it to pull the same file for land near Larkspur; you'll see it in the viewer and on tax statements.
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.