Blog · October 14, 2026 · California
Using the Brentwood GIS Map
Most property questions near Danville start with a parcel lookup.
Main page: Contra Costa County, CA GIS & Parcel Viewer (official map link, county facts and neighboring maps).
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When land near Antioch catches your eye, the Brentwood GIS map lays out parcel boundaries plus basic tax data. In this Brentwood guide: which viewer to open, the fastest ways to search, and the limits worth knowing.
Where the Brentwood GIS map lives
Parcel maps here are usually run by the county, not the town, which makes the Contra Costa County parcel viewer the main source for lots in Brentwood.
Getting to the right map
Begin with the Contra Costa County parcel viewer; it maps each assessed parcel around Concord and Clayton. If the land is near Oakley, put in a street address, an owner's name or a parcel number, and the matching parcel lights up. For acreage around Danville, the record panel normally shows the owner of record, assessed acreage, the parcel number and in many cases the last transfer.
Getting your bearings
Martinez serves as the county seat, home to the main records offices. Smaller places on the map include Oakley, Antioch, Pittsburg, and Clayton, where town lots give way to larger tracts. Around 1,155,025 people call Contra Costa County home (Census Bureau estimate, 2023) spread over about 717 square miles. Places such as Clayton-Marsh Creek-Greenville Fault, San Pablo Dam Reservoir, and Mount Diablo State Park help you orient on the aerial around Danville.
Taking the map into the field
Most viewers work in a phone browser, which helps when you're standing on land near Danville, though signal can drop in rural spots. A screenshot of the parcel near Antioch with its ID is a good backup.
Legal descriptions in California
California follows the Public Land Survey System, so deeds around Antioch reference sections and townships. A standard section is about one square mile, roughly 640 acres, with 36 sections to a township, though sections near Antioch can be irregular. Write down the legal description for the tract near Danville for any title or survey request.
Troubleshooting the viewer
If the viewer stalls on a phone near Clayton, try a desktop browser or clear the cache; links occasionally change, and our directory page keeps the current one.
A word on accuracy
Parcel lines are drawn for taxes, not measured on the ground, so a tree line near Danville can sit several feet off the line on screen. In and around Antioch, records update in batches, so a deed recorded last month might lag behind.
Who handles what
Recorded documents for a parcel near Clayton sit in the index kept by the County Recorder, often with an online index. Building or septic questions for a lot near Pittsburg are for the local planning and health departments, depending on whether the land is inside town limits.
City limits and county records
Brentwood is part of Contra Costa County, California, which means parcel data comes from the county. Out toward Concord, city or town hall handles matters such as zoning, permits and utilities inside its limits, and the county still keeps the parcel and deed records. Land beyond the town limits near Pittsburg often falls under county rules, not municipal ones.
Printing and saving
Print or screenshot the parcel near Concord with its ID visible, which helps later when you ask the assessor or a title company.
Three ways to find a parcel
Addresses are the easiest route inside Brentwood; for owner searches, try last name first. On ground around Concord, searching by parcel number never misses, and it's printed on tax bills.
When a parcel crosses a boundary
Contra Costa County borders Alameda County, Marin County, Sacramento County, San Francisco County, and San Joaquin County, and each of those keeps its own parcel map. A tract near the line by Danville can be split across two assessors' files, so look at the adjacent map before you assume the acreage. Near Clayton, our state page lists every neighboring county map for California.
Deeds, plats and who keeps them
The map is an index, not the title: recorded deeds, subdivision plats and easements covering ground around Oakley are kept by the County Recorder. Older tracts around Oakley can trace back through many deeds, and a title company can sort it out before a purchase.
What the layers show
For property near Clayton, layer lists often include zoning, flood zones, city limits, school districts or contours; not every viewer has them all.
Reading a parcel record
Click a lot in Brentwood and the record usually shows owner, mailing address, assessed value and acreage.
Quick answers
Does Brentwood have its own GIS map?
Short answer: check the Brentwood website or ask city hall; the county viewer remains the main parcel source.
Do I need an account for the parcel map near Danville?
Short answer: the county viewer covering Brentwood needs no account; some sites ask you to accept a disclaimer.
Can I look up a property owner on the map near Danville?
Short answer: the parcel record for a lot near Oakley lists the owner of record, or search by address instead.
What layers does the parcel viewer have for land near Pittsburg?
For most people, aerials near Antioch are usually available as a basemap; availability varies.
Does the parcel map work on a phone for land near Pittsburg?
The map near Oakley usually works on a phone; load it before you lose coverage near Clayton.
Open the official Contra Costa 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.