In California, the Assessor Has to Prove You Wrong (If You Live in Your Home)

Most guides to property tax appeals tell homeowners they carry the burden of proof. For the ordinary appeal, that's true. But if the property is the home you actually live in, California law flips it — and almost nobody mentions this.

What §167 actually says

Revenue & Taxation Code §167(a) creates a rebuttable presumption in favor of the taxpayer in any administrative hearing on the assessment of an owner-occupied single-family dwelling.

In practice, that means the Assessor must affirmatively establish, by a preponderance of the evidence, that their value is correct. You are not walking in needing to prove the assessor wrong; the assessor is walking in needing to prove themselves right. Compare that to Washington State, where the assessor's value is presumed correct and the owner has to overcome it with clear, cogent, and convincing evidence — a far heavier lift. (The full contrast.)

The two conditions

The presumption isn't automatic. You get it only if both are true:

1. It's an owner-occupied single-family dwelling. §167(c) defines this as a dwelling that is the owner's principal place of residence and qualifies for the homeowners' property tax exemption. So: not a rental, not a second home, not a property held in a way that doesn't claim the exemption. If you've never filed for the homeowners' exemption on your primary residence, that's worth fixing regardless — it's a separate reduction on its own.

2. You supplied all information required by law to the assessor. This is the condition people lose the presumption on. If the assessor makes a lawful request for information about your property and you ignore it, the presumption goes away. Answer the requests, and keep a record that you did.

Why this changes how you prepare, not whether you prepare

A shifted burden is a tiebreaker, not a substitute for evidence. Two reasons to build your case anyway:

• The board isn't bound by either side. It can adopt your value, the assessor's, or a third number of its own. A presumption that the assessor must rebut does nothing for you if you've given the board no alternative value to adopt.
• Rebutting a presumption is a low bar for a county assessor. They will arrive with sales data. If yours is the only file on the table with comparable sales in it, the presumption reinforces a case you already made. If your file is empty, the assessor's evidence rebuts the presumption and that's the end of it.

So the practical value of §167 is this: you don't need an airtight case, you need a credible one. Three to five genuinely comparable sales near the January 1 valuation date, honestly compared, is enough to put the burden where the statute already puts it. (How to pick those comps.) CompFinder assembles that set for SF, Oakland, and San Jose properties.

Say it out loud at the hearing

Board members hear dozens of appeals. Opening with one sentence — "This is my principal residence with the homeowners' exemption, so under §167 the presumption is in my favor" — costs nothing and occasionally reframes the whole hearing. Then present your comps and stop talking.

For what the rest of the hearing looks like, see inside an Assessment Appeals Board hearing.