Blog · October 14, 2026 · California
Using the Larkspur Zoning Map
A parcel's zoning district shapes building, splitting and business use near San Rafael.
Main page: Marin County, CA GIS & Parcel Viewer (official map link, county facts and neighboring maps).
Platbookmapper is an Amazon Associate. If you buy through an Amazon link on this page, we earn a commission. The link is a product, not the county map.
Ahead of any building plan near Ross, look at the Larkspur zoning map first: a district label decides setbacks, lot size and uses. In this Larkspur guide: which office sets the rules for a lot, matching a lot to its zoning district, and the questions that save a wasted trip.
The Larkspur zoning map: start here
Within municipal limits, the town or city normally writes the zoning code, which means a parcel in Larkspur answers to that map. Outside those limits, near San Anselmo or Mill Valley, the county's ordinance, if any, takes over; confirm with the county office. A fast way to settle it: ask whether the parcel near Tiburon is inside the boundary.
Where the parcel data lives
Your first stop is the Marin County parcel viewer; it covers each tax parcel from Corte Madera to Ross. For land near Mill Valley, put in a street address, an owner's name or a parcel number, and the matching parcel lights up. In and around San Rafael, the parcel card usually lists the owner of record, acreage on the tax roll, the parcel number and sometimes recent sales.
Limits of the parcel data
Listed acreage is an assessed number; just a licensed surveyor can set the real boundary on land around Tiburon. If you're looking near Tiburon, owner names and values update on a schedule, so a deed recorded last month might lag behind.
Permits after zoning
Once zoning clears a project near Mill Valley, you still need building permits and inspections; septic or sewer and driveway access are often reviewed too.
When a parcel crosses a boundary
Marin County borders Contra Costa County, San Francisco County, Solano County, and Sonoma County, and each of those keeps its own parcel map. Ground near San Anselmo that runs to the line can show up across two assessors' files, so check the adjacent map too. Out toward San Anselmo, the Platbookmapper state page links every bordering county map for California.
Larkspur and the county around it
Larkspur sits in Marin County, California, so its parcels are on the county's map. If the land is near Corte Madera, the municipality handles things like zoning, permits and utilities within town limits, and the county still keeps the parcel and deed records. Acreage past the town limits toward Ross generally falls under county rules instead.
How to look up the district
Pull the parcel up on the Marin County parcel viewer, copy its parcel ID, and use it when you ask the planning office near Corte Madera. For a tract near Ross, district codes like R-1, C-2 or A-1 aren't self-explanatory, so read the ordinance chapter for each; the letters vary from place to place.
Deeds, plats and who keeps them
The map is an index, not the title: deeds, subdivision plats and easements for land near San Anselmo sit with the County Recorder. Long-held tracts around Corte Madera can trace back through several deeds, so a title company can sort it out on a real sale.
Which office to call
For assessment questions about property around Ross belong with the County Assessor, the office behind the parcel record. Questions about what you can build around Corte Madera need the planning or permitting office, depending on whether the land is inside town limits.
Places you'll see on the map
San Rafael serves as the county seat, which is where the courthouse records live. You'll also find Corte Madera, Mill Valley, and Ross. Around 254,407 people live in Marin County (Census estimate, 2023) spread over some 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 Mill Valley.
What the district controls
In and around Mill Valley, the ordinance spells out what's allowed outright and what needs approval. On ground around Tiburon, overlay districts, whether historic, floodplain or corridor, may apply even when the base zoning looks simple.
Variances and rezoning
Closer to Tiburon, most of these involve time, so budget weeks or months before you close.
Calling planning staff
When you call about land near San Rafael, give the parcel number and your intended use; ask what's allowed by right and what needs a permit. Ask whether a parcel near Ross meets current minimum size, because nonconforming lots can carry limits.
Frequently asked
What are setbacks for land near Corte Madera?
In most cases, the district rules for Larkspur list front, side and rear setbacks; the ordinance has the numbers.
Do deed restrictions override zoning near San Rafael?
For most people, recorded restrictions in Larkspur can be stricter than zoning, so follow whichever is stricter.
Can I see zoning on the parcel viewer for Larkspur?
Usually, a zoning layer may be in the Marin County parcel viewer layer list, but the adopted map from the planning office is the official version.
Can I get an exception to a setback near San Rafael?
Good question; variances near San Rafael are usually decided by a board after a hearing; neighbors get notice.
Does the parcel map work on a phone around Ross?
In and around San Anselmo, most viewers run in a mobile browser; screenshots help offline.
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.