This page helps users handle a property search in Contra Costa County, California, by pointing to official parcel map, property information, and Assessor resources.
For most searches, start with CCMap for map-based parcel information or use the county’s ParcelQuest Lite path for parcel maps, assessed values, and house details.
CCMap property search
Contra Costa County identifies CCMap as its online portal for property information. Use search parcels in CCMap to look up individual parcels and review map-based property details.
Have one of these search details ready before using the map:
- Assessor’s Parcel Number, also called APN
- Property street address
Once you are in CCMap, use the map search and parcel tools to narrow the property record.
- Use the search box at the top left to search by APN or address.
- Click a parcel on the map to view associated parcel records.
- Use map tools to measure distances or areas, turn layers on or off, select features, generate notification lists, or print and export a map.
Check mapped information carefully. County map data is dynamic, subject to verification, and does not constitute a legal survey.
ParcelQuest Lite parcel information
ParcelQuest Lite is another county-supported path for viewing parcel maps, assessed values, and house details. The county notes that the tool can search by APN or street address, but some parcels, including vacant land, may require an APN.
Use the county’s accept the ParcelQuest data disclaimer page to enter the parcel map site. The county explains that the Parcel Search link sends users to an off-site data service and that linked external content is not controlled by the county.
Parcel lines and online property information should be treated as a research aid, not a substitute for legal descriptions or official verification.
Maps, layers, and downloadable GIS data
CCMap supports more than a basic address or APN search. Users can review property data such as building square footage and lot size, view Assessor parcel maps online, download parcel maps in PDF format, use radius search capabilities, and review aerial images and contour lines.
The county also makes the Assessor’s parcel shapefile and other GIS data available for free download, with the Assessor parcel shapefile updated monthly.
Owner name limits and in-person property information
Contra Costa County does not display property owner names on its website. The county explains that ownership is part of the assessment roll, but online publication is limited because of privacy requirements involving elected and appointed officials, safety officers, and retired officials.
Some property information is available through the Assessor’s public service counter for a fee.
| Item | Fee |
|---|---|
| Assessor map pages | $3 each, plus $2.50 additional for mailing |
| Radius search | $50 |
| Property information printouts | $1 per page |
| Property characteristics | $7.50 per parcel |
Contra Costa County Assessor contact
Contact the Assessor’s Office for public property assessment questions or when online property information needs office assistance.
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Contra Costa County Assessor’s Office, 2530 Arnold Dr, Suite 100, Martinez, CA 94553
Phone: (925) 313-7400
Fax: (925) 313-7488
TTY: Call 711
Office hours: Monday through Friday, 8:00am to 4:00pm
Phone hours: Monday through Friday, 8:00am to 4:00pm
Common questions
Where do I start a property search in Contra Costa County?
Start with CCMap for a map-based search by address or APN. You can also use ParcelQuest Lite for parcel maps, assessed values, and house details.
Can I search CCMap by owner name?
CCMap supports address and APN searches. Contra Costa County does not display property owner names on its website.
What if a parcel has no street address?
Use the APN when searching. The county notes that some parcels, such as vacant land, do not have street addresses.
Are CCMap parcel lines a legal survey?
No. The county states that mapped data in CCMap does not constitute a legal survey and should be verified by the user or Contra Costa County.
Is online property data free?
The county states there is no charge for data provided online. Certain in-person services through the Assessor’s public service counter have listed fees.