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

See your Notice of Appraised Value for your specific deadline.

GIS Data – Old Schema

We have made changes to our GIS data schema. This page contains data in the old format. This data will be maintained through the end of 2019 and deprecated in 2020. The new schema can be found on our GIS Data page

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

Preview	Description	Posted	Download
N/A	Map Pages: Full set of WCAD’s maps Data Type: PDF 2,075 pages 1.25 GB	2019/07/25
	Page Index: Page index for PDF formatted WCAD maps Data Type: Polygon	2019/07/25
	Abstracts: Original land grant surveys Data Type: Polygon	2019/07/25
	Cadastral Lines: Linework that corresponds with all polygon edges Data Type: Line	2019/07/25
	Community College Boundaries: Community college taxing areas Data Type: Polygon	2019/07/25
	City Boundaries: City limits Data Type: Polygon	2019/07/25
	County Boundary: County area Data Type: Polygon	2019/07/25
	Defined Areas: Boundaries of Defined areas Data Type: Polygon	2019/07/25
	ESD Boundaries: Boundaries of Emergency Service Districts Data Type: Polygon	2019/07/25
	ISD Boundaries: Boundaries of Independent School Districts Data Type: Polygon	2019/07/25
	Limited District Boundaries: Boundaries of Limited Districts Data Type: Polygon	2019/07/25
	MUD Boundaries: Boundaries of Municipal Utility Districts Data Type: Polygon	2019/07/25
	Parcels: Parcels Data Type: Polygon	2019/07/25
	PID Boundaries: Boundaries of Public Utility Districts Data Type: Polygon	2019/07/25
	Road District Boundaries: Boundaries of Road Districts Data Type: Polygon	2019/07/25
	Subdivision Boundaries: Subdivision boundaries Data Type: Polygon	2019/07/25
	TIF Boundaries: Taxing Indriment Financing zones Data Type: Polygon	2019/07/25
	Watershed Boundaries: Boundaries of Watershed areas Data Type: Polygon	2019/07/25
	WC & ID Boundaries: Water Control & Improvement District boundaries Data Type: Polygon	2019/07/25
	WS & ID Boundaries: Water Sewer Improvement District boundaries Data Type: Polygon	2019/07/25