Computer Assisted Mass Appraisal: Condominium Sale History for Washington, D.C.

Daily updated sale history for active condominium properties on the District of Columbia's real property tax assessment roll. The data is sourced from the Office of Tax and Revenue's Computer-Assisted Mass Appraisal system and is maintained by the Assessment Division for ad valorem tax valuation. Each daily update represents a snapshot from the CAMA system, with data subject to change.

Use Cases

• Modeling property value trends based on sale history data.
• Analyzing spatial patterns in condominium assessments using geospatial file formats.
• Building tax assessment forecasting tools using daily-updated sale records.

Strengths

• Data is updated daily, providing a current snapshot.
• Available in multiple formats including CSV and GeoJSON for flexibility.
• License is CC-BY-4.0, permitting broad reuse.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• Description metadata is limited; actual data quality requires manual inspection after download.

Provenance

Source

District of Columbia Office of Tax and Revenue's Computer-Assisted Mass Appraisal system.

Collection Method

Extracted from the CAMA system used by the Assessment Division for real property tax valuation.

Freshness

Updated daily; last recorded update was 2026-03-25 08:19:51.375261.

Geography

Washington, D.C., District of Columbia.