Preliminary 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.

Agent Data Certified Data GIS Data Historical Data Preliminary Data

Due to size limitations we will no longer be offering data in an MDB format. The 17 Tables that were previously available through Microsoft Access are now available through text files.

Name	Description	Type	Size	Posted	Download
2020 Text Files	Text files of 17 tables	TXT	140 MB	Weekly
Additional Data	Frequently requested open records data. Contains seven related tables: document info, permits, appeals, supplement summary, property link info, and process summary info.	TXT	78 KB	Weekly
Ownership	The ownership table will be updated daily. This is a comma delimited owner table, the origional data may contain some commas that have been changed to pipe to allow this table as a CSV. For a txt file, save the csv and rename it as Owner.txt.	CSV	74 KB	Daily
Exemptions	This is a comma delimited exemption table.	CSV	35 KB	Daily