California Mobile Home Property Taxes: Pre- and Post-1980 Rules

California mobile home property taxes depend on one date: July 1, 1980. Manufactured homes first sold new on or after that date pay local property taxes to the county under the same Proposition 13 rules as any other house.¹ Homes first sold new before that date instead pay an annual in-lieu tax to the state Department of Housing and Community Development, unless the owner has voluntarily converted the home to local property tax or installed it on a permanent foundation.² You pay one or the other, never both.³

Which System Applies to Your Home

Start with the title documents. A home registered with HCD comes with an HCD registration card. A home on the county rolls comes with county assessment records and an annual property tax bill.¹ If you’re not sure, call your county assessor for property tax status or HCD’s Registration and Titling program for in-lieu status. Have the serial number, HCD decal number, or physical address ready.

The date rule holds regardless of whether the home sits on a permanent foundation or a rented lot in a mobile home park. A home built after mid-1980 is on local property tax by default.¹ And a home placed on a permanent foundation under Health and Safety Code Section 18551 is no longer classified as a manufactured home at all. It becomes real property, valued and taxed like a conventional house, and HCD drops it from its registration rolls.⁴

Local Property Tax on Post-1980 Homes

Most active mobile homes in California fall here, because the vast majority were sold new after 1980.

Proposition 13 Rules

The county assessor sets a base-year value, generally the market value at the time you bought the home. From there, the assessed value can rise by no more than the California Consumer Price Index or 2 percent per year, whichever is less. The general property tax rate statewide is capped at 1 percent of assessed value, though voter-approved local bonds and assessments add to the final bill.¹

If you own the land under the home, the land is assessed separately from the home itself.¹ Owners who rent a space in a park are only assessed on the home.

Reassessment When the Home Is Sold

A sale triggers a reassessment at current fair market value, which becomes the new base-year value for the buyer.¹ A supplemental tax bill follows, covering the gap between the old assessed value and the new one for the remainder of the fiscal year, and arrives separately from the regular annual bill.⁵ The buyer must also file a Change in Ownership Statement with the county assessor. Not filing doesn’t cancel the reassessment; it just creates delays.

Homeowners’ Exemption

If your home is on local property tax and is your primary residence, you can claim California’s homeowners’ exemption. It reduces your assessed value by $7,000, which saves roughly $70 a year at the 1 percent base rate.⁶ Modest, but worth filing for with your county assessor.

In-Lieu Tax on Pre-1980 Homes

Pre-1980 mobile homes that haven’t been converted stay registered with HCD and pay an annual in-lieu tax, sometimes called the vehicle license fee.² The fee is based on the depreciated value of the home rather than an appraised market value, which is why there is no assessment appeals process on the HCD side. HCD mails an annual renewal notice; you can pay online, by mail, or at a regional office.⁴

Disabled Veteran Exemption

Disabled veterans who use a pre-1980 manufactured home as a principal residence can claim a partial exemption from the in-lieu tax. The exemption removes either $20,000 or $30,000 of the home’s value from the calculation, depending on whether household income falls below a threshold set annually by the State Controller. To qualify, the veteran must have a service-connected disability resulting in total disability, blindness, or the loss of use of two or more limbs, and must have been a California resident at the time of entry into service or on certain specified dates.⁷ The application form is HCD 475.9, available on HCD’s registration and titling forms page.²

Switching From In-Lieu Tax to Property Tax

Owners of pre-1980 homes can voluntarily move to local property taxation. The switch requires notifying both HCD and the county assessor. HCD form RT 495.0 changes the home’s tax type from ILT (in-lieu tax, HCD) to LPT (local property tax, county).²

Reasons owners convert: lenders sometimes require it for financing, buyers may want the home treated like traditional real estate for resale, and only the county side offers the homeowners’ exemption and other property tax relief programs. In practical terms the conversion is one-way, so run the numbers before filing.

Installing the home on a permanent foundation under Health and Safety Code Section 18551 also converts it, and the home is then valued like a conventional house rather than a manufactured home.¹ Remove the home from the foundation later and it reverts to personal property, requiring re-registration with HCD.

Payment Deadlines and Late Penalties

County property taxes are paid in two installments. The first is due November 1 and becomes delinquent after 5:00 p.m. on December 10. The second is due February 1 and becomes delinquent after 5:00 p.m. on April 10. If either date falls on a weekend or holiday, the deadline moves to the next business day.¹ A late first installment gets a 10 percent penalty. A late second installment gets a 10 percent penalty plus an additional cost fee. Most counties accept payment online, by mail, or in person at the tax collector’s office.

For the HCD in-lieu tax, watch the renewal notice date. Late fees accumulate, and a lapsed registration complicates any future sale or transfer.⁴

Federal Deductions That Apply Either Way

A manufactured home qualifies as a “home” for the federal mortgage interest deduction as long as it has sleeping, cooking, and toilet facilities. If the loan is secured by the home, you can deduct interest on up to $750,000 of acquisition debt ($375,000 if married filing separately) when you itemize on Schedule A. Interest on a home equity loan is deductible only if the borrowed funds were used to buy, build, or substantially improve the home securing the loan.⁸

Both the county property tax and the HCD in-lieu tax count as deductible state and local taxes on your federal return if you itemize, subject to the federal SALT cap.

Challenging Your Assessment

If you’re on local property tax and believe the assessed value is too high, you can file an assessment appeal with your county’s assessment appeals board. There is no equivalent process for the HCD in-lieu tax, since that fee is calculated from depreciated value rather than an appraisal.

1
California State Board of Equalization. Manufactured Homes Frequently Asked Questions (FAQs)
2
California Department of Housing and Community Development. Registration and Titling Forms
3
Justia. California Code Revenue and Taxation Code Chapter 1 General Provisions and Definitions
4
California Department of Housing and Community Development. Registration and Titling
5
California State Board of Equalization. Supplemental Assessments on Manufactured Homes
6
Los Angeles County Assessor. Homeowners’ Exemption
7
Legal Information Institute. California Code of Regulations Title 25 Section 5665 – How to Establish an Exemption
8
Internal Revenue Service. Publication 936, Home Mortgage Interest Deduction