Blog · October 14, 2026 · California
Reading the Danville Plat Map for a lot
Lots in Danville trace back to recorded plats filed with the county.
Main page: Contra Costa 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.
Checking easements on a house in Danville? The Danville plat map is the document to find, because the recorded plat shows how the land was divided. What this Danville guide covers: where plats are filed, how a plat differs from a parcel map, and what to look for on the sheet.
The Danville plat map: start here
For land around Moraga, the deed usually cites the plat; bring that to the recorder's office or its online index.
Pulling up a parcel
Go first to the Contra Costa County parcel viewer; it maps every assessed parcel in the county, Walnut Creek included. If you only know roughly where the land is, zoom in from Concord until the lines appear, then click inside the one you want. Around Concord, a pop-up or side panel typically gives the owner of record, assessed acreage, a parcel ID and in many cases the last transfer.
Danville and the county around it
Danville sits in Contra Costa County, California, and the county assessor maps its lots. For acreage around San Ramon, the municipality handles things like zoning, permits and utilities for lots inside the boundary, while the county keeps the tax map. Lots just outside the city limits toward Clayton usually answers to county rules rather than the town's.
Field tips
The parcel map usually runs in a mobile browser, useful out on a road near San Ramon, but coverage can be spotty out of town. A printout of the tract near San Ramon helps when you meet an owner or agent.
Legal descriptions in California
California uses the Public Land Survey System, which means a tract near Moraga is described by section, township and range. Each section is nominally a mile square, about 640 acres, with 36 sections to a township, though real sections near Walnut Creek vary in size. Write down the legal description for the tract near Moraga before you request a deed or survey.
Amended plats
Lots near San Ramon can be combined or reconfigured by a replat, search the index for replats of the same subdivision; vacated streets or alleys also get recorded.
Recorded plat or GIS layer
Where lines don't match around El Cerrito, go with the plat and a surveyor's work.
Which office to call
Anything recorded against property around San Ramon are with the County Recorder, often with an online index. Building or septic questions for a lot near San Ramon go to planning, building or health offices, depending on whether the land is inside town limits.
Lots, blocks and easements
With a lot near Moraga, the sheet usually includes lot and block numbers, dimensions and bearings, street rights-of-way and easements.
Neighboring parcel maps
Contra Costa County meets Alameda County, Marin County, Sacramento County, San Francisco County, and San Joaquin County, all with their own assessor records. A tract near the line by San Ramon may be split across two assessors' files, so look at the neighboring map before you assume the acreage. If the land is near San Ramon, our state page lists every bordering county map across California.
Metes and bounds instead
Rural land near Moraga that was never subdivided is often described by metes and bounds or survey description; the deed and any recorded survey describe it instead.
Recorded documents worth pulling
For anything that matters, pull the recorded deed through the County Recorder; the parcel map near Walnut Creek only summarizes it. In and around Clayton, use the book and page from the tax record so staff can find the deed fast.
Before you lean on the lines
Acreage on the record is a tax-roll number; just a licensed surveyor establishes the real lines for a parcel near Lafayette. For a parcel near Clayton, owner names and values update on a schedule, so a deed recorded last month might lag behind.
A quick look at the area
Martinez holds the county offices, home to the main records offices. You'll also find San Ramon, Walnut Creek, Moraga, and Clayton, each with its own cluster of lots. Roughly 1,155,025 people call Contra Costa County home (Census Bureau estimate, 2023) across some 717 square miles. Places such as Clayton-Marsh Creek-Greenville Fault, San Pablo Dam Reservoir, and Mount Diablo State Park make handy reference points on the map near Lafayette.
Ordering the Danville plat map
If you're looking near Lafayette, some counties put plat images online, while others require a visit or a request; small fees are common.
Questions about the Danville plat map
How do I get a copy of a plat in Danville?
In most cases, recorded plats near Walnut Creek are filed with the County Recorder.
Are old plats online near Hercules?
It depends, but older plats near Moraga may be on film or paper, including older subdivisions.
How is a plat different from the parcel map near Walnut Creek?
With a lot near Walnut Creek, GIS parcels are tax drawings, and the recorded plat is the legal document; trust the plat when they differ.
What is a replat in Danville?
Short answer: lot splits in Danville go through the planning office; ask staff about the process.
How is land described in California deeds around Walnut Creek?
For property near Walnut Creek, deeds use lot and block, metes and bounds or survey descriptions; copy it for any survey or title request.
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.