Williamson County · Check the filing deadline on your notice
Severely over-appraised? A § 25.25(d) correction is still open until January 31, 2027 →
Williamson County Property Tax Appeal Guide
Williamson County homeowners can protest their property taxes by filing with the Williamson Central Appraisal District (WCAD) before May 15, or by mid-July under Texas Property Tax Code Section 41.44(b) for late protests. Our analysis of 227,853 Williamson County homes found 13.2% assessed above comparable sales, with average potential savings of $982/year.
Round Rock / Georgetown homeowners save an average of $982/year when they appeal with strong comparable evidence. 88% of well-prepared protests succeed.
How to protest property taxes in Williamson County
Every Texas homeowner has a right to protest their assessed value under Texas Property Tax Code §41.41. In Williamson County, protests are handled by the Williamson Central Appraisal District (WCAD). The usual deadline is May 15 or 30 days after your appraisal notice was mailed, whichever is later. A weekend or legal-holiday deadline moves to the next regular business day. Confirm your district calendar and tax year.
WCAD uses an online protest system with evidence upload. Williamson values cooled with the broader Austin market, leaving 2026 notices often above current realistic sale comps.
The strongest protests include 3-7 comparable sales from the last 12 months in your immediate neighborhood, adjusted for square footage, age, and condition. Round Rock / Georgetown-area assessors typically reduce values when presented with clear, recent comp data.
Williamson County is one of the counties in our Texas Over-Assessment Study, where we ran millions of homes through the same unequal-appraisal comparison the WCAD uses. You can check your own address free in 30 seconds, or read our full methodology first.
File With
Williamson Central Appraisal District
- Address
- 625 FM 1460, Georgetown, TX 78626
- Phone
- (512) 930-3787
- Website
- www.wcad.org
- Next deadline
- Check your notice and district calendar (notice and business-day rules apply)
Live · pulled from WCAD public records
$68,442,304 in projected annual overpayments across 19 Williamson County ZIPs.
Most overassessed ZIPs in Williamson County
Ranked by total annual projected overpayment. Drill into any ZIP for the top flagged homes.
Explore local property tax research
Research places associated with Williamson County, Texas. City and ZIP boundaries can cross counties. Use the jurisdiction on your assessment notice for filing.
Cities and communities
Check your Williamson County assessment
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Check My Property →Texas protest guides
Williamson County protest guides
See the full data behind these numbers in our Texas Over-Assessment Study.