The Division of Planning and Permitting

Data and Mapping


Frederick County GIS


Frederick County Population Estimate as of January 1, 2021: 268,314

Permits and Inspections Data Reports 

2010 Census Demographic Profiles

County, municipalities, census designated places

2010 U.S. Census Populations

Population Estimates

Population Projections

Building Permits & COO’s by Dwelling Type

Monthly Building Permit Reports  

Frederick County is not responsible for issuing permits in the City of Frederick, and town of Mount Airy. This data is the compiled report of these three entities in regards to number of issued building, housing units, and commercial permits and totals for the cost of construction, impact fees, and excise tax reported on a monthly, year to date, and 5-year average.

Residential Development Pipeline

Includes all county and municipal projects that have received some type of development approval and may or may not be under construction. Development approvals are derived from approved site plan applications, preliminary subdivision plan applications, or a Phase I PUD/MXD applications (county only). 

  • Approved Units: Total lots/units that have received either site plan, preliminary subdivision, or Phase I PUD/MXD plan approval
  • Developed/Permitted Units: Lots/units that are constructed or have building permits issued
  • Available Pipeline: Total remaining lots/units that have not been constructed nor have permits issued
  • Recorded Units: Total lots/units that have been recorded and may or may not be developed
  • Recorded Units Available: Lots/units that have been recorded but are not developed or have permits issued

Residential Development Pipeline Interactive Map - as of April 2022

Residential Development Pipeline Map (PDF) - as of April 2022

Contact Us

  1. Planning and Permitting Division

    30 N. Market St.
    Frederick, MD 21701
    Ph: 301-600-1153

    Staff Directory