Blog · October 14, 2026 · California
San Ramon GIS Map, California: a how-to
Most property questions near Walnut Creek 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 San Ramon, a look at the San Ramon GIS map gives you lines, owner names and parcel numbers. What this San Ramon guide covers: which viewer to open, the fastest ways to search, and the limits worth knowing.
The official viewer behind the San Ramon GIS map
Out toward Concord, some cities also run their own GIS portal for utilities or zoning; that can add detail on top of the county map.
Pulling up a parcel
Lots and tracts near Danville appear on the Contra Costa County parcel viewer, free to use and open without a login. On ground around Danville, enter a street address, an owner's name or a parcel number, then pick the result to center the map on it. In and around Concord, write down the parcel ID before closing the panel; each clerk in the county asks for it first.
Taking the map into the field
Most viewers work in a phone browser, handy when you're parked on a road near Moraga, but coverage can be spotty out of town. A saved image of the lot near Moraga and its lines helps when you meet an owner or agent.
City limits and county records
San Ramon sits in Contra Costa County, California, and the county assessor maps its lots. Local government in San Ramon handles things like zoning, permits and utilities for lots inside the boundary, while the county keeps the tax map. Lots just outside the town limits out by Moraga generally answers to county rules rather than the town's.
Troubleshooting the viewer
If the viewer stalls on a phone near Concord, try a desktop browser or clear the cache; links occasionally change, and our directory page keeps the current one.
Searching the map
Acreage around Moraga might not have a street number, so pan the aerial and click the lot. With a lot near Danville, searching by parcel number never misses, and you'll find it on tax statements.
Before you lean on the lines
Tax maps are drawn for assessment, not surveyed, so the edge of a yard near Walnut Creek may sit a few yards off the line on screen. For a tract near Danville, owner names and values update on a schedule, so a deed recorded last month might lag behind.
Beyond the parcel lines
Toggling imagery near Danville to compare lines with fences and driveways.
Saving what you find
Save a screenshot of the lot near Danville and its record panel, which helps later when you ask the assessor or a title company.
Reading a parcel record
Sales history, if listed, helps with pricing near Danville are a useful starting point; an appraiser is the real authority.
A quick look at the area
Martinez serves as the county seat, home to the main records offices. You'll also find Danville, Walnut Creek, Moraga, and Clayton, each with its own cluster of lots. Around 1,155,025 people call Contra Costa County home (Census Bureau estimate, 2023) on roughly 717 square miles. Landmarks such as Clayton-Marsh Creek-Greenville Fault, San Pablo Dam Reservoir, and Mount Diablo State Park help you orient on the aerial around Walnut Creek.
Recorded documents worth pulling
When the details count, request the recorded deed from the County Recorder; the parcel map near Clayton only summarizes it. For property near Moraga, have ready the instrument number shown in the record panel to skip a name search.
Who handles what
Anything recorded against property around Lafayette sit in the index kept by the County Recorder, usually searchable by name or document number. Questions about what you can build around Moraga need the planning or permitting office, depending on whether the land is inside town limits.
Next door to Contra Costa County
Contra Costa County touches 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 may be split across two assessors' files, so look at the neighboring map as well. For acreage around Concord, the Platbookmapper state page links every neighboring county map for California.
Sections, lots and bearings
California uses the Public Land Survey System, so deeds around Danville reference sections and townships. A standard section is about one square mile, roughly 640 acres, with 36 sections to a township, though real sections near Clayton vary in size. Copy the legal description from the record for the parcel near Moraga for any title or survey request.
Frequently asked
Do I need an account for the parcel map near Moraga?
Short answer: the Contra Costa County parcel viewer is free and opens without a login; some sites ask you to accept a disclaimer.
Can I look up a property owner on the map near Walnut Creek?
The parcel record for a lot near Danville lists the owner of record, or search by address instead.
What layers does the parcel viewer have around Moraga?
Around Walnut Creek, many viewers offer aerial imagery plus layers like city limits, zoning or flood zones; availability varies.
Why does a recent sale near Moraga not show?
Updates come in batches.
Where do I find the parcel number for land near Clayton?
It's the number the County Assessor uses to track a tract near Moraga, and it's on the record panel and tax bills.
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.