Office of Tax and Revenue

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Individual Income and Franchise Tax Extensions - Learn more here. Important District of Columbia Real Property Tax Filing Deadline Extensions - Learn more here.
We are currently experiencing higher than normal wait times, and apologize for any inconvenience. For faster service, please use our online portal, MyTax.DC.gov.
Where’s my refund? Check your DC refund status here.
View real property tax information here.

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Real Property Geographic Information Systems (GIS) Program

The District of Columbia Office of Tax and Revenue (OTR), Real Property Assessment Division, Maps and Title GIS program, in coordination with OCTO GIS, provides real property mapping applications, services, and data to property owners, the public, and government agencies. These mapping applications serve as location awareness platforms and visual perspectives for DC real property, and collaboration tools for government and citizens.

GIS and Mapping, Data, and Standard Address Applications

  • Real Property Assessment Map Search: Search and View DC real property and assessment information by Address, Property ID (Square Suffix Lot), or Assessment Neighborhood number.
  • DC Atlas Plus: DC Atlas Plus allows users to search and identify over 300 different types of data, from aerial photography and demographics, to property and transportation.
  • DC Open Data: Find, download, build and add to applications, and analyze hundreds of GIS Mapping layers and datasets, shared by many DC Government agencies.
  • Master Address Repository: A standardized, searchable database of addresses and other identified locations in DC.

GIS and Mapping, and Other Services


  • GIS Glossary - Definitions and explanation of GIS and mapping terminology.
  • DCGIS Steering Committee (GISSC) - DC OTR is a voting member of the GISSC which serves as the decision-making body taking into account the GIS needs and resources of DC agencies.