Blog · October 14, 2026 · California
Reading the Danville Zoning Map before you build or buy
A parcel's zoning district shapes building, splitting and business use near Clayton.
Main page: Contra Costa County, CA GIS & Parcel Viewer (official map link, county facts and neighboring maps).
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Want to add a garage, run a home business or split a lot near Walnut Creek? Your first check is the Danville zoning map, as each district carries its own rules. Covered here for Danville: which office sets the rules for a lot, matching a lot to its zoning district, and when a variance or rezoning comes up.
The Danville zoning map: start here
Inside town or city limits, the town or city normally writes the zoning code, so a lot in Danville answers to that map. Past the city line, around Walnut Creek, the county may have its own zoning, or none at all; the county planning or zoning office can confirm. The quickest way to tell which applies: ask whether the parcel near Moraga is inside the boundary.
The viewer Contra Costa County publishes
Begin with the Contra Costa County parcel viewer; it maps every tax parcel from Clayton to San Ramon. Closer to Lafayette, type a street address, an owner's name or a parcel number, and the matching parcel lights up. For a home near Walnut Creek, a pop-up or side panel normally shows the owner of record, assessed acreage, the parcel number and in many cases the last transfer.
Which office to call
Deeds, mortgages and recorded plats for land near Moraga sit in the index kept by the County Recorder, usually searchable by name or document number. Questions about what you can build around San Ramon go to planning, building or health offices, and the answer depends on jurisdiction.
Permits after zoning
Once zoning clears a project near Moraga, you still need building permits and inspections; health and road departments may weigh in on land near Clayton.
Where Danville fits in
Danville lies within Contra Costa County, California, and the county assessor maps its lots. For property near Moraga, city or town hall handles things like zoning, permits and utilities for lots inside the boundary, and the county still keeps the parcel and deed records. Land beyond the town limits near Walnut Creek generally follows county rules, not municipal ones.
Finding a parcel's zoning district
Look up the lot on the Contra Costa County parcel viewer first, copy its parcel ID, and use it when you ask the planning office near Moraga. With a lot near Walnut Creek, district codes like R-1, C-2 or A-1 aren't self-explanatory, so read the ordinance chapter for each; the letters vary from place to place.
Questions for the planning office
Have the parcel ID ready and describe the plan for the lot near Walnut Creek; staff can point to the right section of the ordinance. Also ask whether the lot near San Ramon is a legal lot of record, because nonconforming lots can carry limits.
Sections, lots and bearings
California is laid out under the Public Land Survey System, so rural legal descriptions near Concord 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 Moraga odd-sized. Keep the legal description for land near San Ramon when you talk to a surveyor.
When a parcel crosses a boundary
Contra Costa County touches Alameda County, Marin County, Sacramento County, San Francisco County, and San Joaquin County; every one of them runs a separate parcel map. Ground near Moraga that runs to the line may be split in two county records, so open the adjacent map before you assume the acreage. For a home near Moraga, our state page lists every bordering county map across California.
The paper trail behind a parcel
When the details count, get the recorded deed through the County Recorder; the parcel map near San Ramon only summarizes it. Near San Ramon, use the document number from the tax record to skip a name search.
Setbacks, lot size and uses
For acreage around San Ramon, the ordinance spells out what's allowed outright and what needs approval. In and around San Ramon, overlays, whether historic, floodplain or corridor, can add rules on top of the base district.
When a plan doesn't fit
If you're looking near Walnut Creek, most of these involve time, so budget weeks or months before you close.
Places you'll see on the map
Martinez holds the county offices, where most land records are kept. You'll also find San Ramon, Walnut Creek, Moraga, and Clayton. Roughly 1,155,025 people live in Contra Costa County (Census Bureau estimate, 2023) spread over roughly 717 square miles. Places such as Clayton-Marsh Creek-Greenville Fault, San Pablo Dam Reservoir, and Mount Diablo State Park are easy to spot when you zoom out from San Ramon.
Frequently asked
What does a rezoning in Danville involve?
It depends, but rezoning in Danville usually takes weeks to months; ask about fees and timelines early.
Where is the Danville zoning map?
In most cases, start with the parcel record, then check the adopted zoning map for Danville; staff can confirm by phone or email.
What are setbacks for land near San Ramon?
Short answer: setbacks near Moraga depend on the zoning district; the ordinance has the numbers.
Can covenants be stricter than zoning near Walnut Creek?
For most people, covenants are private and zoning is public law, and a lot near Walnut Creek must meet both.
How is land described in California deeds for land near Clayton?
The deed for land near Walnut Creek carries the legal description; 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.