San Francisco Public Works Parcel History Linking Active and Historical Parcels

A dataset from the City of San Francisco connects current Public Works Basemap parcels to their historical predecessors, tracking changes when parcels are divided or combined. It is created using an iterative process on the parcel change log and is refreshed daily. This data is distinct from the Assessor-Recorder's taxable parcel records.

Use Cases

• Trace the lineage of a property boundary based on parcel division and combination history.
• Identify the precise boundary between private property and public rights-of-way based on Public Works basemap parcels.
• Analyze the temporal lag between physical parcel changes and tax assessment updates based on the dataset's distinction from Assessor records.

Strengths

• Data is refreshed daily, providing a high potential for recency.
• Explicitly documents the distinction between Public Works and Assessor-Recorder parcel systems, clarifying scope.

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

City of San Francisco, Department of Public Works

Collection Method

Created by an iterative process utilizing the parcel change log.

Freshness

Refreshed daily; last updated 2026-03-22 04:13:42.450316.

Geography

San Francisco, California, USA