Blog · October 14, 2026 · California
South San Francisco Plat Map, California: plats and lots
A recorded plat shows how land near Brisbane was divided into lots.
Main page: San Mateo County, CA GIS & Parcel Viewer (official map link, county facts and neighboring maps).
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When a listing near Daly City mentions a lot number, you'll need the South San Francisco plat map to make sense of it. This South San Francisco guide covers: where plats are filed, plat versus tax map, and the details that matter to buyers.
Tracking down the South San Francisco plat map
For a lot in South San Francisco, look for the plat book reference on the parcel record; that makes the request quick.
Pulling up a parcel
Begin with the San Mateo County parcel viewer; it maps every tax parcel around Colma and Brisbane. When a rural tract has no street number, pan along the nearest road until the lines appear, then click inside the one you want, and that holds around Daly City too. If you're looking near Daly City, the record panel typically gives the owner of record, assessed acreage, the parcel number and often a sale date.
South San Francisco, CA: the basics
South San Francisco lies within San Mateo County, California, so its parcels are on the county's map. Out toward Brisbane, the municipality handles matters such as zoning, permits and utilities inside its limits, and the county still keeps the parcel and deed records. Acreage past the town limits out by Colma often follows county rules rather than the town's.
Deeds, plats and who keeps them
The map is an index, not the title: recorded deeds, plats and easements covering ground around Brisbane sit with the County Recorder. Long-held tracts near Millbrae can go back through a long string of deeds, so a title company earns its fee before a purchase.
When a plat changes
Lots near Brisbane can be combined or reconfigured by a replat, so check for later filings; street vacations near Millbrae show up in the records too.
Recorded plat or GIS layer
Where lines don't match in South San Francisco, trust the recorded documents over the GIS layer.
Reading the legal description
California is laid out under the Public Land Survey System, so rural legal descriptions near Brisbane cite section, township and range. Each section is nominally a mile square, about 640 acres, with 36 sections to a township, though real sections near Millbrae vary in size. Copy the legal description from the record for the parcel near San Bruno for any title or survey request.
Lots, blocks and easements
Easements on the plat near San Bruno stay with the land when it sells; read the notes on the sheet.
Using it on a phone
The parcel map usually runs in a mobile browser, which helps when you're standing on land near Daly City, though signal can drop in rural spots. A printout of the tract near Brisbane is a good backup.
Which office to call
Anything recorded against property around San Bruno are with the County Recorder, sometimes only in person. Questions about what you can build around Colma need the planning or permitting office, depending on whether the land is inside town limits.
Online indexes and office visits
For property near Millbrae, many recorder offices offer an online index, while others require a visit or a request; small fees are common.
When there's no plat
Acreage around San Bruno outside a subdivision is often described by metes and bounds or survey description; look for a recorded survey for land near Daly City.
What the map can't tell you
Tax maps are drawn for assessment, not measured on the ground, so the edge of a yard near Brisbane often sits a few yards off the line on screen. Records update in batches, so a fresh transfer around Brisbane may not show yet.
Next door to San Mateo County
San Mateo County meets Alameda County, San Francisco County, Santa Clara County, and Santa Cruz County; every one of them runs a separate parcel map. A tract near the line by Brisbane can be split in two county records, so look at the adjacent map before you assume the acreage. For acreage around Colma, the Platbookmapper state page links every neighboring county map for California.
A quick look at the area
Redwood City is the county seat, which is where the courthouse records live. Other places on the map include Brisbane, San Bruno, Millbrae, and Colma. Around 726,353 people call San Mateo County home (Census Bureau estimate, 2023) across some 449 square miles. Landmarks such as Don Edwards San Francisco Bay National Wildlife Refuge are easy to spot when you zoom out from Millbrae.
South San Francisco: common questions
Is a plat map a survey for land near Millbrae?
For land near Daly City, a recorded plat is based on a survey, but the GIS map is not; trust the plat when they differ.
How far back do plats go near Brisbane?
It depends, but older plats near Burlingame may be on film or paper, including older subdivisions.
Who has recorded plats for land near Burlingame?
For most people, recorded plats near Burlingame are filed with the County Recorder; small copy fees are common.
Do easements show on the plat near Burlingame?
Building on an easement near Colma is generally restricted; ask planning staff if unsure.
What's the tax parcel number used for around Daly City?
It's the number the County Assessor uses to track a tract near Millbrae; copy it before you call anyone.
Open the official San Mateo 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.