Why are so many SF homeowners appealing?

San Francisco saw a 555% increase in appeals due to significant property value declines since 2022, particularly in the condo and tech corridor markets.

Is my SF condo likely overassessed?

If you purchased during 2020-2022 peak prices, there's a good chance. Check recent comparable sales in your building to compare.

What's the deadline for SF assessment appeals?

September 15 annually for the regular roll. November 30 for supplemental assessments.

Guides/California/San Francisco County

San Francisco County, California

How to Appeal Property Taxes in San Francisco County (2026)

Appeal Deadline

September 15 (for regular roll; supplemental/escape: 60 days from notice)

County Assessor Appeal Forms

Overview

San Francisco County has seen a 555% surge in assessment appeals in recent years, driven by declining property values in the tech sector and changing market conditions. With approximately 210,000 parcels, the county's Assessor-Recorder handles a significant volume of appeals. Under Prop 13, you can file a decline-in-value appeal when your market value drops below your assessed value.

Step-by-Step Appeal Process

Verify your assessed value at sfassessor.org

Determine if your current market value is below your Prop 13 assessed value

File an Assessment Appeal Application with the SF Assessment Appeals Board by September 15

Prepare comparable sales evidence supporting a lower market value

Attend your scheduled hearing or submit evidence in writing

Receive the board's decision

What Evidence Do You Need?

Recent comparable sales in your neighborhood

Evidence of market decline (median price trends, days on market)

Professional appraisal if available

Documentation of any property issues

Common Reasons for Successful Appeals

Tech industry layoffs and remote work have reduced demand in SF

Condo values in particular have declined significantly

High interest rates have reduced buying power

Supplemental assessment from purchase was based on peak prices

Tips for Success

1SF's market decline since 2022 means many properties are eligible for decline-in-value appeals

2Condos have been hit hardest — check recent sales in your building

3The SF Assessor is proactive about adjusting values, but may not catch every decline

4File early — the September 15 deadline is strict

Frequently Asked Questions

Check Your Assessment in San Francisco County

Enter your address to see if you're overpaying and get a professional appeal packet for $49.

Free Assessment Check

This guide is for informational purposes only and does not constitute legal advice. Deadlines and procedures may change. Always verify current information with your county assessor.