Blog · October 14, 2026 · California
Using the Concord GIS Map
Most property questions near Pittsburg 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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For a parcel in or near Concord, the Concord GIS map shows the outline, the owner of record and a parcel ID. In this Concord guide: where that map lives, how to search it, and what to double-check with records.
Where the Concord GIS map lives
A town may publish separate layers for zoning or utilities; ask city hall in Concord whether one exists.
Where the parcel data lives
Go first to the Contra Costa County parcel viewer; it covers each tax parcel from Martinez to Walnut Creek. If you only know roughly where the land is, zoom in from Clayton until the lines appear, then click inside the one you want. In and around Martinez, a pop-up or side panel normally shows the owner of record, acreage on the tax roll, a parcel ID and sometimes recent sales.
What the map can't tell you
Tax maps are drawn for assessment, not surveyed, so a fence near Lafayette may sit a few yards off the line on screen. If you're looking near Martinez, records update in batches, so a deed recorded last month might lag behind.
Which office to call
Recorded documents for a parcel near Martinez are with the County Recorder, often with an online index. Building or septic questions for a lot near Pleasant Hill go to planning, building or health offices, and the answer depends on jurisdiction.
Deeds, plats and who keeps them
The map is an index, not the title: recorded deeds, subdivision plats and easements for land near Clayton sit with the County Recorder. For acreage around Lafayette, have ready the book and page from the tax record and the lookup takes minutes.
Keeping a record
Print or screenshot the parcel near Martinez with its ID visible, which helps later when you ask the assessor or a title company.
When the map won't load
When the map won't open around Walnut Creek, switch browsers or turn off pop-up blockers; links occasionally change, and our directory page keeps the current one.
On site with the map
Most viewers work in a phone browser, which helps when you're standing on land near Pleasant Hill, though signal can drop in rural spots. A screenshot of the parcel near Walnut Creek with its ID keeps working without signal.
Concord and the county around it
Concord lies within Contra Costa County, California, which means parcel data comes from the county. For a home near Martinez, the municipality handles matters such as zoning, permits and utilities for lots inside the boundary, but the county runs assessment and recording. Lots just outside the town limits near Pittsburg often follows county rules rather than the town's.
Three ways to find a parcel
Acreage around Pittsburg might not have a street number, so pan the aerial and click the lot. For land near Martinez, searching by parcel number never misses, and it's printed on tax bills.
Reading the legal description
California uses the Public Land Survey System, so rural legal descriptions near Lafayette cite section, township and range. A standard section is about one square mile, roughly 640 acres, with 36 sections to a township, though corrections make some sections near Lafayette odd-sized. Write down the legal description for the tract near Pleasant Hill before you request a deed or survey.
Beyond the parcel lines
Near Clayton, look in the layer list for municipal boundaries, floodplain and sometimes zoning; not every viewer has them all.
Reading a parcel record
If sale dates appear, they help gauge the market around Martinez are a useful starting point; an appraiser is the real authority.
Places you'll see on the map
Martinez serves as the county seat, where most land records are kept. You'll also find Pleasant Hill, Clayton, and Walnut Creek. About 1,155,025 people call Contra Costa County home (Census estimate, 2023) across 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 Clayton.
Next door to Contra Costa County
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. Acreage along the edge near Clayton may be split in two county records, so look at the adjacent map too. For acreage around Martinez, our state page lists every neighboring county map for California.
Quick answers
How accurate is the parcel map near Pleasant Hill?
Lines near Pittsburg can be off by several feet or more; get a survey before a fence.
Where else can I find maps of Concord?
Usually, check the Concord website or ask city hall.
How do I find who owns a lot near Pleasant Hill?
Click the lot near Clayton to see the owner; try variations if nothing comes up.
What layers does the parcel viewer have for land near Walnut Creek?
If you're looking near Walnut Creek, many viewers offer aerial imagery plus layers like city limits, zoning or flood zones; availability varies.
Where do I find the parcel number for land near Lafayette?
The parcel ID identifies one tax parcel near Martinez; you'll see it in the viewer and on tax statements.
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.