New York City Condominium Tax Map Data, Updated Monthly

Digital Tax Map: Condominiums is a dataset from the New York City Department of Finance representing condominium units for property tax mapping. Data is extracted from the DOF's internal system on the last Friday of each month and refreshed on ArcGIS Online on the 1st. The dataset is part of a larger Digital Tax Map collection and is provided for informational purposes, with a disclaimer that it may not reflect the latest changes in other City systems.

Use Cases

• Mapping condominium property boundaries for tax assessment based on the Digital Tax Map collection.
• Tracking monthly changes to condominium lots and boundaries based on the official Digital Alteration Book (DAB).
• Integrating condominium spatial data with other city property systems for analysis.
• Developing property information applications using the monthly updated Feature Server data.

Strengths

• Data is updated monthly with a structured release cycle, extracted on the last Friday and refreshed on the 1st.
• Reliability is supported by an alternating Set A and Set B system, where a previous month's copy remains available if one set has issues.
• Data is part of an official city collection from the New York City Department of Finance.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• The dataset may not reflect the latest changes in other City systems, such as exemptions or buildings data.
• Row count is unknown, which may limit suitability assessment.

Provenance

Source

City of New York, Department of Finance

Collection Method

Extracted from the Department of Finance's internal system.

Freshness

Updated monthly; last metadata update was 2026-03-22 03:58:08.345196.

Geography

New York City