Williamson County, TexasProperty records & tax offices
Links open the listed public-office or service-provider website in a new tab. This directory does not collect payments.
Find the right property record
Use the property portal for ownership and assessed value, the collector for a bill or balance, and the map for parcel location. Have the address, owner name, or parcel number ready.
Tax bills & filing dates
These are the dates and qualifications recorded in the directory. Confirm your tax year and current deadline with the official office and your property’s notice.
- Tax bill mailing
- Week of October 20, 2026; Williamson County states 2026 property-tax statements will be mailed that week.
- Payment deadline
- 2026 property taxes must be paid in full by Sunday, January 31, 2027; delinquency begins Monday, February 1, 2027, when penalty and interest apply. Qualified quarter-payment dates are January 31, March 31, May 31, and July 31, 2027.
- Assessment appeal
- May 15, 2026, or within 30 days after the 2026 Notice of Appraised Value was mailed/delivered, whichever is later; residence homestead owners generally have an April 30, 2026 early deadline or 30 days after notice, whichever is later; the deadline printed on the notice and statutory exceptions control. Official Texas Comptroller guidance: https://comptroller.texas.gov/taxes/property-tax/protests/
Exemptions & appeals
View exemption application (opens in a new tab)Exemption filing
April 30, 2026 for most 2026 residence-homestead, age-65-or-older, and disabled-person applications; qualifying residence-homestead applications may generally be filed late up to two years after the delinquency date under Texas Tax Code §11.431; local CAD instructions control.
Senior relief
Texas owners age 65 or older or disabled may qualify for the additional residence-homestead exemption, the school-tax ceiling/freeze, the four-installment payment option, and tax deferral; eligibility and documentation are administered by the local appraisal district and tax office. Official Texas Comptroller guidance: https://comptroller.texas.gov/taxes/property-tax/exemptions/ and https://comptroller.texas.gov/taxes/property-tax/pay/options.php
Valuation limits
For 2026, Texas Tax Code §23.23 limits a qualifying residence homestead's appraised-value increase to the lesser of market value or prior appraised value plus 10% and new improvements. Tax Code §23.231 may limit qualifying non-residence-homestead real property valued at $5,320,000 or less to a 20% annual increase; that circuit-breaker limitation expires December 31, 2026 and excludes agricultural, timber, recreational/park/scenic, public-access-airport, and restricted-use-timberland property. The 2026 special-valuation cap rates are 10.00% for agricultural/open-space land and 7.77% for timberland. Official Comptroller guidance: https://comptroller.texas.gov/taxes/property-tax/valuing-property.php and https://comptroller.texas.gov/taxes/property-tax/caprates.php
For a valuation appeal, use the appeal date in the tax and filing section above. Keep your notice, supporting evidence, and proof of submission.
More exemption & appeal guidance →