Existing & Potential Development Mapping Tool
About the Online Mapping Tool
The Loudoun Existing and Potential Development (EPD) map is an interactive mapping tool that provides access to information regarding:
- Existing use of structures
- Existing use of parcels
- Location and existing number of housing units within residential projects that are completed and approved (not started or partially built)
- The remaining residential development potential of vacant or under-developed parcels and approved projects (not started or partially built)
- Location of completed and approved non-residential projects
The land use data for structures, parcels, projects, and build-out scenarios are developed and maintained by the Department of Planning and Zoning. Data available in this tool currently reflect land use conditions as of July 1, 2017.
The data in the mapping system can be used for land use, capital facilities, and transportation planning purposes as well as fiscal, demographic, and market analysis. In addition, the mapping system's information is an important tool for land use scenario planning initiatives such as Envision Loudoun, the county's effort to develop a new comprehensive plan.
Access the Tool
Companion Map: Residential Communities of Loudoun
The Residential Communities of Loudoun County interactive map presents detailed information about existing and planned communities in Loudoun, including how many acres the community covers, how many units have been built, how many units may eventually be built, and the percentage of the project that is complete. View more information and a link to the map.
Background of EPD Map: Board of Supervisors Direction
A detailed countywide build-out analysis of residential units was performed by the Department of Planning and Zoning as per the direction of the Board of Supervisors on January 21, 2015. The purpose of a build-out analysis is to provide residential supply information on the future development of housing. The supply of housing is the amount of development potential available. The results of the build-out analysis were presented to the Board of Supervisors on October 4, 2016. For the results, background information, and the purpose behind the build-out analysis, see the following:
- February 18, 2016 BOS Item (PDF) - Background and Methodology
- October 4, 2016 BOS Presentation (PDF) - Results
- October 4, 2016 BOS Item (PDF) - Results and Methodology Refinements
As part of the build-out analysis effort in 2016, the county developed the land use geographic information system databases that are available through the Loudoun Existing and Potential Development Tool (EPD).
Users with questions or comments should email the Department of Planning and Zoning or call 703-777-0246.
The land use data for structures, parcels, projects, and build-out scenarios are developed and maintained by the Department of Planning and Zoning. This data is used for land use, capital facilities, and transportation planning purposes. In addition, it is used for fiscal, demographic, and market analysis. This data is not used for tax assessment purposes. For tax assessment land use data please reference Loudoun County's tax assessment/parcel database.
Every reasonable effort has been made to ensure the accuracy of these data, however accuracy is not guaranteed. Loudoun County does not assume any liability arising from the use of these data or for any errors or omissions on this site. These data are provided without warranty of any kind, either expressed or implied, including, but not limited to, the implied warranties of merchantability and fitness for a particular service.
This Existing and Potential Development Tool, including the build-out and residential pipeline data contained within it, has been developed based on certain assumptions and scenarios approved by the Board of Supervisors for research and analysis purposes only. It is not intended to give, or deny, any right to landowners and it is not intended to substitute or change in any form the land use process as prescribed in the ordinances and other norms of the county. Reliance on these data is at the risk of the user.