Collin CAD: Abstract and Subdivision Adjustment Factors

Collin CAD Abstract/Subdivision List provides annual land and improvement adjustment factors for property tax assessment. The dataset covers abstract, condominium, subdivision, and mobile home park listings for the current and previous five years. It is published by the Collin County Appraisal District and is available on multiple government data platforms.

Use Cases

• Analyzing year-over-year property value trends using `Year`, `abstSubLandAdjPct`, and `abstSubImprvAdjPct`.
• Identifying property types and subdivisions for assessment rolls using `abstSubType`, `abstSubCode`, and `abstSubName`.
• Applying standardized adjustment factors to land and improvement valuations for tax equalization.
• Comparing adjustment rates across different abstract and subdivision categories over a six-year period.

Strengths

• Provides a six-year time series of adjustment factors for longitudinal analysis.
• Includes specific adjustment percentages for both land and improvements, supporting detailed valuation work.
• Available on multiple official platforms (data.texas.gov, Data.gov), indicating institutional endorsement.

Limitations

• Key metadata like row count, file size, and license are missing or marked as 'None' across all sources.
• The 'last updated' dates conflict between sources (2026-05-29 on Socrata vs. 2026-03-25 on Data.gov).
• Column information is incomplete, with the Data.gov source listing columns as 'unknown'.

Provenance

Source

Collin County Appraisal District (Collin CAD)

Collection Method

Administrative data collection for property tax assessment.

Time Range

Covers the current year and the previous five years.

Freshness

Last updated 2026-05-29 according to the Socrata platform.

Geography

Collin County, Texas, USA