ITSPE: District of Columbia Property Tax Assessment and Ownership Data

The Integrated Tax System Public Extract (ITSPE) stores property tax assessment and ownership information for the District of Columbia. It is used for sending tax bills, property analysis, and contains data on ownership, mailing addresses, tax lots, condominiums, and federally owned lands. The dataset is published by the District of Columbia government and was last updated on March 25, 2026.

Use Cases

• Assess property tax revenue based on ownership and lot information.
• Analyze land use patterns based on data for condominiums, air rights lots, and record lots.
• Link geospatial property vector layers to administrative data using the SSL (Square, Suffix, Lot) key.
• Identify federally owned lands such as reservations and appropriations for jurisdictional analysis.

Strengths

• Data is linked to geospatial property vector layers via a defined SSL (Square, Suffix, Lot) key.
• Includes multiple complex property types such as air rights lots, possessory interests, and condominiums.
• Published under a permissive CC-BY-4.0 license for reuse.

Limitations

• Row count and dataset size are unknown, which may limit suitability assessment.
• Column-level documentation is absent; field semantics must be inferred after download.
• The description notes complex relationships (e.g., not all record lots have a 1:1 link to the tax database).

Provenance

Source

District of Columbia government

Freshness

Last updated 2026-03-25 08:11:37.884233; freshness should be verified.

Geography

District of Columbia, Washington D.C.