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Contra Costa County, California — Mechanics Lien Filing Guide

Everything you need to know about filing a mechanics lien in Contra Costa County under California law — deadlines, notice requirements, and step-by-step process.

Preliminary Notice

20 days

Lien Filing Deadline

90 days

Enforcement Period

90 days

Notice Category

Preliminary

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Mechanics Lien Requirements in Contra Costa County

If you've provided labor, materials, or services for a construction project in Contra Costa County,California, and haven't been paid, you have the legal right to file a mechanics lien. This applies whether you're a general contractor, subcontractor, plumber, electrician, roofer, material supplier, or any other construction professional working in Contra Costa County.

All construction projects in Contra Costa County are governed by California state law (CA Civil Code §§ 8200-8216). There isn't a separate Contra Costa County lien law — the state rules apply uniformly. What is local is where you record: in California you file the lien with the Contra Costa County Recorder — or the equivalent local recording office.

Important: To keep your lien rights active on a Contra Costa County project,California requires you to send the “20-Day Preliminary Notice” within 20 days of starting work or delivering materials. This is a standard compliance step — not confrontational — and it keeps all your options open.

Once you file your mechanics lien in Contra Costa County, the property owner can't easily sell or refinance the property until your claim is resolved. You then have 90 days to file a lawsuit to enforce the lien if the owner still doesn't pay. Most disputes are resolved through payment or negotiation after the lien is filed.

Who Must Receive Notice for Contra Costa County Projects?

Your RoleMust Notify
General ContractorConstruction Lender
SubcontractorProperty Owner, General Contractor, Construction Lender
Material SupplierProperty Owner, General Contractor, Construction Lender
LaborerProperty Owner, General Contractor, Construction Lender
Equipment Rental CompanyProperty Owner, General Contractor, Construction Lender
Architect / Engineer / SurveyorProperty Owner, General Contractor, Construction Lender

Who Can File a Mechanics Lien in Contra Costa County?

Nearly anyone who contributes to a construction project in Contra Costa County can file a lien if they're not paid. This includes general contractors, subcontractors (electricians, plumbers, roofers, etc.), material suppliers, equipment rental companies, laborers, architects and engineers, and surveyors. You don't need a direct contract with the property owner — even if you're several layers down the payment chain, California law protects your right to get paid for work done in Contra Costa County.

How a Mechanics Lien Protects You

A mechanics lien puts a legal claim on the Contra Costa County property you improved — the owner can't easily sell or refinance until your payment is resolved. In most cases, filing the lien is enough to get paid without going to court. To keep this option available, make sure your notices and deadlines are handled on time.

Accepted Delivery Methods

California accepts these methods for delivering notices on Contra Costa County projects:

Certified Mail (with return receipt)Personal Delivery (hand-delivered)

Filing Deadlines for Contra Costa County

Lien Filing Deadline

90 days

From completion of work (or 30/60 days from Notice of Completion)

Enforcement Deadline

90 days

To file foreclosure action after recording the lien

Where & How to Record a Lien in Contra Costa County

Recording office

Contra Costa County Clerk-Recorder

925-335-7900Official recording page

Recording fees

  • First page: $14
  • Each additional page: $3

e-Recording

Available

Cover sheet

Required

Verified 2026-06-27 from Contra Costa County's official records.

Official California Resources

These are official state government websites where you can look up statutes, verify contractor licenses, and search business registrations.

State Legislature

Look up California lien statutes and laws

California Legislature

Contractor Licensing

Verify licenses and check requirements

Contractors State License Board (CSLB)

Secretary of State

Business entity search and registration

California Secretary of State

File a Mechanics Lien in Contra Costa County, California

LienGrid handles the entire lien filing process in Contra Costa County, California — from required notices to the filing itself. State-compliant documents, certified mail delivery, and deadline tracking, all in one platform.

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Contra Costa County Mechanics Lien FAQ

Common questions about filing a mechanics lien in Contra Costa County, California.

Filing a mechanics lien in Contra Costa County follows California state law (CA Civil Code §§ 8200-8216). Here's the basic process: First, you need to have sent the required "20-Day Preliminary Notice" to the proper parties. Then, prepare your lien document with your name, the property address, a description of work done, and the amount owed. File it with the Contra Costa County Recorder — there's usually a small recording fee. After filing, send a copy to the property owner. You have 90 days from completion of work (or 30/60 days from Notice of Completion) to file. File within this window to keep your lien rights protected.
Yes. California requires a "20-Day Preliminary Notice" for construction projects, including those in Contra Costa County. You must send it within 20 days of when you first start working or delivering materials to the project. This notice goes to specific parties (like the property owner and general contractor) and protects your right to file a lien later if you're not paid. Sending it on time keeps your lien rights active and gives you full protection if payment issues come up later.
For projects in Contra Costa County, you have 90 days from completion of work (or 30/60 days from Notice of Completion) to file your mechanics lien. This is a hard deadline set by California state law — not a Contra Costa County rule specifically. File within this window to keep your lien rights protected on that project. After filing, you have 90 days to file a lawsuit to enforce the lien if the owner still doesn't pay.
You file your mechanics lien with the Contra Costa County Recorder. This is the office that handles real property records for Contra Costa County. You'll need to bring your completed lien document and pay a recording fee. Some counties also accept electronic filings. The lien requirements come from California state law (CA Civil Code §§ 8200-8216), but the actual filing happens at the county level.
For Contra Costa County construction projects, California law accepts these delivery methods: Certified Mail, Personal Delivery. The delivery method matters — using a method that isn't on the approved list could make your notice invalid even if the other party received it. Always keep proof of delivery (receipts, tracking numbers) in your project file.
Almost anyone who provides labor, materials, or services for a construction project in Contra Costa County can file a mechanics lien if they're not paid. This includes general contractors, subcontractors (electricians, plumbers, roofers, etc.), material suppliers, equipment rental companies, architects, engineers, and laborers. Even if you don't have a direct contract with the property owner, California law typically allows you to file a lien to protect your right to payment.
Yes — LienGrid automates the entire mechanics lien process for Contra Costa County and all of California. The platform tracks your deadlines, generates compliant notices with the correct California statutory language, identifies required recipients, and can send notices via approved delivery methods on your behalf. Instead of manually tracking dates and managing compliance on your Contra Costa County project, LienGrid handles it all. Start a free trial to see how it works.

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Content reviewed by LienGrid's compliance team|Last reviewed: March 2026

This information is for general guidance only and does not constitute legal advice. California laws change frequently — always verify current requirements and consult a licensed attorney in the relevant jurisdiction before taking legal action. LienGrid makes every effort to keep this information accurate, but we cannot guarantee completeness or currency.