Contra Costa County Property Records Search: Free Lookup for APN, Deeds, Taxes, Maps & Owner Clues
Use this guide when you need to identify a Contra Costa County property, find the APN, check assessed value, pull a recorded deed, review tax status, or understand why owner names may not appear online. It is organized by real user task, so you can move from parcel lookup to deed search to tax verification without confusing one county office with another.
What Should You Use First for Contra Costa County Property Records?
Contra Costa County Property Records Contacts You Actually Need
The Assessor, Clerk-Recorder and Treasurer-Tax Collector handle different parts of a property search. Use the right office before visiting Martinez or calling county staff.
Contra Costa County Assessor
County Clerk-Recorder
Treasurer-Tax Collector
Maps / Parcel Viewer
Contra Costa County Record Type: What to Search, Where to Search
| Your Task | Correct Place | Best Search Detail | Expected Result |
|---|---|---|---|
| Find APN, parcel map, assessed value, house details | Assessor Maps & Property Information | APN or street address | Parcel map, assessed value, property details and house characteristics. |
| Find owner name online | Assessor policy + Recorder documents | APN, address, deed, party names | Assessor does not display owner names online; recorded deeds may show grantees. |
| Find deed, deed of trust, release, lien, map | Clerk-Recorder Official Records Index | Name, document number, recording date, book/page, APN, map or legal description | Recorded document index and copy-purchase options. |
| Pay or verify property taxes | Treasurer-Tax Collector Tax Portal | 10-digit APN, bill or parcel information | Tax details, payment status, payment scheduling, paperless billing, tax history. |
| Boundary, road, survey or map reference | Recorded maps + GIS + professional review | APN, parcel map, subdivision, survey or book/page | Map context; legal boundary decisions require recorded documents or a surveyor. |
How to Search Contra Costa County Property Records by APN or Address
Use the Assessor route when you need parcel maps, assessed values, APN lookup, property characteristics or house details. The county’s Maps & Property Information page explains that ParcelQuest Lite lets users find property by Assessor’s Parcel Number or street address, and that vacant parcels may require an APN because they may not have a street address.
APN search
Use the 10-digit APN from a tax bill, deed, old paperwork or county map reference.
Street address
Use the property location address. Remove extra wording if the search fails.
APN likely needed
Vacant parcels may not have street addresses, so address search may not work.
Counter help
Use the Assessor public counter for printouts, map pages or characteristics when needed.
Micro step-by-step: Search APN, map and assessed value
- Collect one strong detail: APN, street address, tax bill, recorded document number or parcel clue.
- Open the county Maps & Property Information page.
- Read the ParcelQuest Lite notice and continue only if you are comfortable using the county-linked off-site search tool.
- Choose APN search when you have the parcel number; choose street address when you do not.
- If address search fails, remove unit labels, punctuation, “Ave,” “Road,” “Court,” “Drive,” and directional words.
- Open the matching property result and confirm the APN, address, assessed value and parcel map.
- Save the APN before moving to tax payment or recorded document search.
| Assessor Counter Item | Official Fee | When It Helps |
|---|---|---|
| Assessor map page | $3 each; $2.50 additional for mailing | When you need a map page for review, research or title/survey context. |
| Radius search | $50 | When you need nearby property information around a subject parcel. |
| Property information printout | $1 per page | When a printed county counter record is easier than online notes. |
| Property characteristics | $7.50 per parcel | When building/parcel details matter for appraisal or research. |
Can You Search Contra Costa County Property Records by Owner Name?
This is the most common frustration for Contra Costa searches. Property ownership is part of the assessment roll, but the county says it does not display owner names on the Assessor website due to privacy and update issues. That means your best path is usually APN/address first, then recorded deed research.
If you only have an address
Find the APN using Maps & Property Information first. Then use that APN for tax lookup and RecorderWorks deed research.
If you only have a person’s name
Use RecorderWorks name search, entering last name then first name, or a business name. Add a date range to avoid timeouts or too many results.
If the property is in a trust or LLC
Search trustee name, trust name, LLC name, prior owner and business-name variations without punctuation.
If you need legal proof
Order or view the recorded deed. A parcel page and a tax bill are not title reports.
How to Search Contra Costa County Recorded Property Documents
Use the Clerk-Recorder when you need recorded legal documents: grant deeds, deeds of trust, reconveyances, releases, liens, judgments, maps, parcel maps, record surveys or documents affecting title. The RecorderWorks index includes multiple search paths, including Name, Document Number, Document Type, Map, Recording Date, Book/Page and APN for deeds recorded 3/3/1997 to present.
Grant deed
Grant deeds transfer title. Search grantor/grantee names and compare the legal description.
Deed of trust
Recorded when buying or refinancing; later reconveyance may show the loan was satisfied.
Lien documents
The Recorder records liens and releases prepared by agencies; it does not create the lien.
Micro step-by-step: Search by name in RecorderWorks
- Collect the owner, buyer, seller, lender, trustee, business or trust name.
- Open the Recorder property document search page and continue to the Official Records Index.
- Choose the Name tab.
- Enter the person’s last name, space, first name, or enter a business name.
- Add a recording-date range; narrow ranges prevent huge result sets and timeouts.
- Click a document number to view the record details.
- Click a name in the document details to list related documents tied to that person.
- If you need a copy, add the document to the shopping cart and choose regular or certified copy as needed.
Micro step-by-step: Search by APN, document number or map
- Get the APN from the Assessor map/property search or tax bill.
- Use APN search for deeds recorded 3/3/1997 to present when APN is your strongest identifier.
- Use Document Number search if a title report, old deed or escrow document gives you a recording number.
- Use Book and Page for records from the 1986-1993 period when available.
- Use Map search for parcel maps, subdivision maps, record survey maps and map-related documents.
- Review document type and recording date before ordering a copy.
| Recorded Search Type | What to Enter | When to Use It |
|---|---|---|
| Name | Last name + first name, partial name or business name | When researching owners, lenders, trustees, liens or grantees. |
| Document Number | Recording number / instrument number | Fastest when you already have the document reference. |
| Recording Date | Date range | Useful for recent sales, refinances, releases or known closing dates. |
| Book and Page | Book/page reference | Useful for older references, especially around the 1986-1993 indexing route. |
| APN | Assessor Parcel Number | Available on deeds recorded 3/3/1997 to present. |
| Map | Map type/date clues | For parcel maps, subdivision maps, record survey maps and related records. |
How to Check Contra Costa County Property Tax Records
Use the Tax Portal when you need tax details, online payment, scheduled payment, paperless billing or tax history. The Treasurer-Tax Collector handles secured, unsecured, redemption and supplemental property taxes.
Due Nov. 1
Delinquent after Dec. 10. Pay before the deadline to avoid a 10% penalty.
Due Feb. 1
Delinquent after Apr. 10. Late payment adds 10% penalty plus $20 cost.
E-check
No service fee, but rejected e-checks may trigger a returned-check fee up to $85.
2.50%
Credit, debit, PayPal, Apple Pay, Google Pay and Venmo payments have a $3.50 minimum fee.
Micro step-by-step: Look up tax bill and payment status
- Find your 10-digit APN from the Assessor tool, tax bill or property documents.
- Open the Treasurer-Tax Collector Tax Portal.
- Choose the secured property tax lookup/payment path if you are checking land or structures.
- Enter APN, bill or property details requested by the portal.
- Open the matching account and check tax year, installment, amount due, paid status and tax history.
- Choose e-check if you want the no-service-fee online option.
- Save the confirmation number, tax year, installment and payment date.
Micro step-by-step: Pay by phone
- Have your secured property tax bill, 10-digit APN and payment method ready.
- Call the IVR payment line.
- Choose the secured property tax payment option.
- Follow the prompts carefully; the IVR is time-sensitive and may end after inactivity.
- Save the confirmation number and verify posting later in the Tax Portal.
Micro step-by-step: Mail a tax payment without a coupon
- Write the 10-digit APN on the face of the check.
- Include taxpayer name, property location, phone number and email if available.
- Do not staple, fold, paper clip, tape or glue the check to a coupon.
- Mail to the Tax Collector mailing address if no coupon is available.
- Check your bank for the cleared check and verify posting online within about a week.
| Tax Rule / Detail | What Contra Costa County Says | Why It Matters |
|---|---|---|
| Annual bill timing | Annual secured tax bills are mailed once per year in late September through early October. | Do not wait until December if your bill did not arrive; check online. |
| 1st installment | Payable by November 1; delinquent after December 10. | A 10% penalty applies after the deadline. |
| 2nd installment | Payable by February 1; delinquent after April 10. | A 10% penalty plus $20 delinquent cost applies after the deadline. |
| Tax default | If unpaid by 5:00 p.m. June 30, property becomes tax-defaulted July 1. | A $15 redemption fee and 1.5% monthly interest can be added. |
| Power of sale | Taxes can remain unpaid for a maximum of five years after default before sale/acquisition risk. | Long-term delinquency can lead to public auction or acquisition. |
| Partial payment | Partial payments are not accepted for annual secured property tax bills. | Pay the correct installment amount before the deadline. |
How to Use Contra Costa County Maps Without Misreading Property Boundaries
APN / address search
Use it to view parcel maps, assessed values and house details.
Monthly update
The county says assessor parcel shapefile and other GIS data are updated monthly and free to download.
Not a survey
Use recorded maps, records of survey and professional review for boundary decisions.
Micro step-by-step: Use map tools for parcel context
- Start with APN if available; use address only if APN is unknown.
- Open the county Maps & Property Information page.
- Choose ParcelQuest Lite for simple parcel lookup or GIS download when you need data layers.
- Match APN, parcel location, streets and assessed value details.
- Do not use the online map alone for fence, easement, driveway, boundary or title decisions.
Micro step-by-step: Find recorded maps and surveys
- Find the APN and subdivision or legal-description clues first.
- Use RecorderWorks Map search for parcel maps, subdivision maps and record survey maps.
- Search by map type and recording date range when available.
- Open the matching document number.
- Order a certified copy if a lender, court, title company or agency requires it.
Common Next Steps After a Contra Costa County Property Search
These task cards cover the questions people usually ask after they find the parcel or deed.
Get a certified recorded document copy
- Search RecorderWorks and open the correct document number.
- Add the document to the shopping cart.
- Choose Regular or Certified for the document copy type.
- Recalculate the order total.
- Check out and save the order confirmation.
Change mailing address for tax/assessment notices
- Confirm the APN and current mailing address.
- Use the Assessor’s change-address route.
- Submit the required owner and parcel information.
- Save confirmation and check future tax mailings.
Set up paperless property tax billing
- Find your APN or tax account first.
- Open the Tax Portal.
- Select paperless billing or annual secured bill notification.
- Enter the required account and email information.
- Save the confirmation and watch for annual bill notices.
Fix These Before You Think the Contra Costa Record Is Missing
| Problem | Likely Cause | Fix |
|---|---|---|
| No owner name on property search | The Assessor does not display owner names online. | Use APN/address for parcel lookup, then RecorderWorks for deed/grantee information. |
| No address result | Vacant land may not have a street address, or the address is formatted differently. | Search by APN. If no APN, simplify the street number and street name. |
| RecorderWorks name search times out | Search is too broad. | Add a partial first name and narrow the date range. |
| Lien appears on credit report | Recorder records liens prepared by agencies; it does not create the lien. | View the lien copy, identify the agency, and search for a recorded release. |
| Tax payment mailed but not posted | Missing APN, insufficient billing info, wrong amount or processing time. | Verify check cleared and check online posting using the 10-digit APN. |
| Assessed value confused with market value | Assessed value follows tax assessment rules and may not equal sale price. | Use sales data, appraisals and market comps separately from assessed value. |
Map to Contra Costa County Clerk-Recorder Office
Use this map for recorded property documents, certified copies and Recorder questions. For assessed value or maps, use the Assessor address. For tax payments, use the Treasurer-Tax Collector address.
Bring this
APN, document number, recording date, party names, map/book/page reference, property address and payment method.
Do not bring only this
A Zillow screenshot, vague owner name or “property in Walnut Creek/Richmond/Concord” will slow the search. Bring APN or document clues.
Contra Costa County Property Records Tips That Save Time
Use these before buying, refinancing, researching a lien, helping family with probate, checking a tax bill, or confirming a property in Martinez, Walnut Creek, Concord, Richmond, Antioch, Brentwood, Pittsburg, San Ramon or nearby communities.
Use APN as your master key
APN works across maps, tax bills and many recorded-document searches. Address spelling changes; APN stays cleaner.
Do not expect owner names on Assessor pages
The county does not display owner names online, so recorded deeds are the better route for ownership transfer research.
Search deed releases after old loans
If you find a deed of trust, search later reconveyance or satisfaction records before assuming the loan is active.
Use e-check for tax payments
E-check has no service fee. Card and wallet payments carry a 2.50% fee with a $3.50 minimum.
Watch December 10 and April 10
These are the main secured tax delinquency dates. Pay early if a deadline falls near a weekend, holiday or website problem.
Use certified copies for legal needs
RecorderWorks notes original recorded documents are not generally accepted for legal purposes; certified copies are typically needed.
Contra Costa County Property Records Search FAQs
QHow do I search Contra Costa County property records for free?▾
Start with Contra Costa County Maps & Property Information and use ParcelQuest Lite to search by APN or street address. Then use RecorderWorks for recorded deeds and the Tax Portal for tax bills and payment history.
QCan I search Contra Costa County property records by owner name?▾
The Assessor does not display property-owner names on its website. For owner clues, identify the property by APN or address first, then search recorded deeds in RecorderWorks by grantor/grantee name, business name or document number.
QWhere do I find Contra Costa County deed records?▾
Use the Clerk-Recorder’s Official Records Index through RecorderWorks. You can search by name, document number, document type, map, recording date, book/page, APN and legal description depending on what you have.
QCan I search recorded documents by APN?▾
RecorderWorks shows APN search for deeds recorded from March 3, 1997 to present. APN searches may take up to one minute, so use document number or name search when you have stronger details.
QWhat is the Contra Costa County Assessor phone number?▾
The Assessor phone number is 925-313-7400. The office is at 2530 Arnold Drive, Suite 100, Martinez, CA 94553, with office and phone hours Monday-Friday, 8:00 a.m.-4:00 p.m.
QWhat is the Contra Costa County Clerk-Recorder phone number?▾
The Clerk-Recorder phone number for recorded property document questions is 925-335-7900. The street and mailing address shown in RecorderWorks is 555 Escobar Street, Martinez, CA 94553.
QWhen are Contra Costa County secured property taxes due?▾
The first installment is payable by November 1 and delinquent after December 10. The second installment is payable by February 1 and delinquent after April 10. If the delinquency date falls on a weekend or holiday, it extends to the next business day.
QIs e-check free for Contra Costa County property taxes?▾
Yes. The county lists no service fee for e-check payments. However, rejected e-checks may be subject to the county’s returned-check fee of up to $85.
QCan online property records prove legal ownership?▾
Online parcel and tax records are research tools. Legal ownership should be verified through recorded deeds and professional title review. For purchase, refinance, probate, lien or foreclosure decisions, do not rely only on an Assessor or tax summary.
QIs Property-Recordss.org the official Contra Costa County records website?▾
No. Property-Recordss.org is an independent informational guide. Always verify property records, deeds, taxes, liens, maps and legal documents directly through Contra Costa County official offices and systems.