New York City Condominium Tax Map Records

Monthly updated data on condominium units within the New York City Department of Finance Digital Tax Map system. The dataset is maintained by the NYC Department of Finance and extracted from internal systems on the last Friday of each month. It provides a formal record of condominium applications for property tax mapping purposes.

Use Cases

• Link individual condo units to their base tax lot using CONDO_KEY and CONDO_BASE_BBL for property roll analysis.
• Analyze condominium naming conventions and distribution across boroughs using CONDO_NAME and CONDO_BASE_BORO.
• Validate or reconcile billing addresses for tax assessment by joining on CONDO_BILLING_BBL with other property datasets.
• Track the structure of condominium complexes by examining the relationship between CONDO_NUMBER, CONDO_BASE_BLOCK, and CONDO_BASE_LOT.

Strengths

• Monthly update cycle ensures regular data refreshes.
• Part of a formal city government tax mapping system (Digital Tax Map).
• Provides specific identifiers (e.g., CONDO_BASE_BBL_KEY) for joining with related property datasets.

Limitations

• Data may not reflect the latest changes in other city systems like exemptions or buildings.
• Sample size and total row count are unknown, limiting assessment of coverage.
• Reliability depends on formal applications submitted to the Department of Finance, not all real-world changes.

Provenance

Source

New York City Department of Finance, via data.cityofnewyork.us.

Collection Method

Extracted from the Department of Finance's internal Digital Tax Map system.

Freshness

Updated monthly; data extracted on the last Friday of each month and refreshed online on the 1st.

Geography

New York City, New York, USA.