Historical Data

The Protest Deadline for most property owners in Williamson County was May 15, 2023.

See your Notice of Appraised Value for your specific deadline.

Here are a few documents that might be helpful:

Additional Open Records File Layout
Certified/Supplement Roll File Layout
File Layout for the tables updated daily
Property Data Export File Layout

WCAD’s data is presented in various formats and file types. Click on a data type below to view all of the downloadable content available within it.

Certified Data Preliminary Data Historical Data GIS Data Agent Data

Name	Description	Type	Size	Posted	Download
1999 – 2020 Certified Values	Microsoft Excel spreadsheet	XLSX	1MB	2020/07/24
2020 Certified Appraisal Roll	Zip file contains appraisal roll report as of certification	TXT	239MB	2020/07/23
2019 Certified Appraisal Roll	Zip file contains appraisal roll report as of certification	TXT	176MB	2020/07/23
2018 Certified Appraisal Roll	Zip file contains appraisal roll report as of certification	TXT	189MB	2019/09/19
2017 Certified Appraisal Roll	Zip file contains appraisal roll report as of certification	TXT	40MB	2019/06/24
2017 Assessment Roll Grand Totals	Document that contains the 2017 assessment roll grand totals as of certification	PDF	1MB	2017/07/19
2016 Certified Appraisal Roll	Zip file contains appraisal roll report as of certification	TXT	289MB	2017/07/20
2016 Assessment Roll Grand Totals	Document that contains the 2016 assessment roll grand totals as of certification	PDF	1MB	2017/07/19
2015 Certified Appraisal Roll	Zip file contains appraisal roll report as of certification	TXT	305MB	2015/07/20
2015 Assessment Roll Grand Totals	Document that contains the 2015 assessment roll grand totals as of certification	PDF	1MB	2019/06/24
2014 Certified Appraisal Roll	Database that contains nineteen related tables of property attributes	MDB	289MB	2015/07/17
2014 Assessment Roll Grand Totals	Document that contains the 2014 assessment roll grand totals as of supplement 16	PDF	1MB	2015/12/11
Segment Classifications	Building segment classes	CSV	2KB	2018/11/20
1999 – 2020 Appraisal Roll Totals	Microsoft Excel spreadsheet, sorted by taxing entity	XLSX	1MB	2020/07/24
Rollback Information	Microsoft Excel spreadsheet	XLSX	1MB	2020/12/09