Department of BuildingsThis layer is derived from the Common Ownership Lots and represents property transactions as they've occurred since the implementation of the Vector Property Mapping program in September 2006. A property transaction entails new geometry (split/combination of Lot(s) or property type conversion (from Air Rights, Record, or Tax Lots to Condo lots). The layer contains locations and attributes of archived features (inactive lots - dead lots) and corresponds with Office of Tax and Revenue's Public Extract files (ITSPE). It occurs weekly for the current calendar year and geometry updated when a transaction occurs.ArcGIS FeatureLayerhttps://hub.arcgis.com/datasets/abfe294ea1b6498dbfb219a319fdb6ee_78engOpen Data DCPublicLand Boundary Change [District of Columbia--Washington]Web servicesDistrict of Columbia--WashingtonDistrict of ColumbiaLast Modified: 2025-05-19