New York City Condominium Tax Map Units

Monthly updated records of condominium units in New York City's official tax map system. The Department of Finance extracts data on the last Friday of each month and publishes it on ArcGIS Online on the 1st. This dataset is part of the Digital Tax Map Collection maintained by the NYC Department of Finance.

Use Cases

• Predict CONDO_NUMBER from UNIT_BLOCK and UNIT_LOT for unit classification.
• Analyze spatial distribution of condominiums using GEOMETRY_TYPE and UNIT_BORO.
• Model changes in EFFECTIVE_TAX_YEAR across different CONDO_BASE_BBLs.
• Join property records using CONDO_KEY or UNIT_BBL as a primary identifier.
• Validate UNIT_DESIGNATION and FLOOR_TEXT entries against building models.

Strengths

• Monthly update cycle ensures regular data refresh.
• 16 distinct columns provide detailed unit and base property identifiers.
• Data is part of an official, alternated release system (Set A/Set B) for reliability.

Limitations

• Row count and total dataset size are unknown.
• Data may not reflect the latest changes in other City systems like exemptions.
• Sample data is unavailable for preliminary inspection.

Provenance

Source

NYC Department of Finance Digital Tax Map Collection.

Collection Method

Extracted from DOF's internal system and published via ArcGIS Feature Servers.

Freshness

Monthly, extracted on the last Friday and refreshed on the 1st.

Geography

New York City, based on UNIT_BORO and CONDO_BASE_BORO columns.