Mobilehome Tax


Before July 1, 1980, mobilehomes (also known as manufactured homes) in California were treated as vehicles, subject to taxation through "in-lieu license fees" imposed by the State of California, Department of Motor Vehicles in place of ad-valorem property taxation. The Mobilehome Property Tax Law of 1980 provided a system of taxing mobilehomes in a similar manner as conventional homes. Since then, assessments of mobilehomes subject to local property tax have been placed on the secured tax roll and billed in two installments, notwithstanding the fact that mobilehomes are actually personal property whose taxes are often not secured by land.

The responsibility for collecting mobilehome license fees was initially vested with the Department of Motor Vehicles. This responsibility was transferred to the State of California Department of Housing and Community Development (HCD) as of July 1, 1981. Mobilehomes sold since then become subject to the Mobilehome Property Tax Law administered by county tax officials


HCD requires a Tax Clearance Certificate to be issued by the tax collector's office before a change of title is allowed when a mobilehome is sold or moved out of Contra Costa County. The process to change the ownership of a mobilehome requires filing a Tax Clearance Certificate with HCD. After HCD has processed the change in ownership, the assessor's office will be notified to change the ownership record on the assessment roll. This can take up to several months to complete.

HCD will not transfer title of a used manufactured home, mobilehome or floating home which is subject to local property tax without the presentation of a Tax Clearance Certificate issued by the tax collector of the county where the manufactured home, mobilehome, or floating home is located. A release of liability will not change ownership.

The purpose of the Tax Clearance Certificate is to provide verification to HCD that as of the date of issuance, all taxes then discovered have been paid. In addition to collecting outstanding taxes existing on the mobilehome, estimated or known taxes for the following fiscal year must be collected from January 1 to November 1 prior to issuing the Tax Clearance Certificate. The Tax Clearance Certificate must be processed by the Department of Housing and Community Development who changes the ownership records and notifies the Contra Costa County Assessor's Office of the change so that ownership information can be updated.


If YES, and you filed less than six (6) months ago, please forward the annual property tax bill to the new owner along with this information. If you filed more than six (6) months ago, please contact HCD via the HCD website, 1800 Third Street, P.O. Box 2111, Sacramento, CA 95812-2111, or (916) 445-4782 or 1-800-952-8356 to inquire into the status of processing your change in ownership.

If NO, and you have not filed a Tax Clearance Certificate with HCD, the change in ownership cannot be processed and you will continue to receive and be responsible for the property tax bills. You will need to obtain a Tax Clearance Certificate from the tax collector and file it with HCD before a change in ownership can be processed on the assessment roll. Please contact the tax collector's office between 9:00 a.m. and 4:00 p.m. Monday through Friday, excluding holidays at (925) 608-9500 to request an Application for a Tax Clearance Certificate be mailed to you or print an application online, fill out and mail the application or bring to: Contra Costa County Tax Collector, 625 Court Street, Room 100, Martinez, CA 94553.


Mobilehome property taxes are treated as secured property taxes during the current tax year. Annual property tax bills are mailed only once each year by November 1 and are due and delinquent the same dates every year. You may pay the total tax as shown on the tax bill without penalty on or before the December 10 or pay in two equal installments. If you elect to pay in two installments, the first installment must be paid on or before December 10 to avoid penalties and the second installment must be paid on or before April 10 to avoid penalties. PLEASE NOTE: A REMINDER NOTICE OR BILL WILL NOT BE SENT OUT FOR THE SECOND INSTALLMENT PAYMENT.

If the tax bill is not paid by June 30, the taxes will be transferred to the unsecured tax roll for collection. An additional 1½% of the base amount of the tax bill is attached on the first day of each month thereafter together with any actual costs of collection incurred by the county up to the time the delinquency is paid.

Failure to pay property taxes on a mobilehome may result in a summary judgment being filed and recorded against the owner of record on the assessment roll by the tax collector to enforce the collection of the unpaid property tax bill. If you are unsure if you have a summary judgment recorded against you for a mobilehome you previously or currently own, please contact the tax collector's office by phone between 9:00 a.m. and 4:00 p.m. Monday through Friday, excluding holidays at (925) 608-9500.