Skip Navigation

Accessory structures include sheds, gazebos, garages, etc. A building permit is required for accessory structures greater than 120 square feet, and for all accessory structures, regardless of size, that are located:

  • In a proposed or designated Baltimore County Historic District
  • In the floodplain
  • In the Chesapeake Bay Critical Area
  • On the Baltimore County Landmarks List

Required Documents

You must provide the following when submitting your permit application:

Building Guidelines

The structure must meet the following guidelines:

  • Must be located in the rear yard behind the rear foundation wall line, unless a zoning variance is obtained
  • Cannot occupy no more than 40 percent of the yard
  • Must be located 2.5 feet from the side and rear property lines, however any side closer than five feet to the property line requires a one-hour fire-rated safety wall and no openings on that side
  • If there is an alley, there must be a minimum setback of 15 feet from the centerline.
  • There is a height limitation of 15 feet.
  • If located on a corner lot, the structure must be situated in the half of the lot furthest from the side street.
  • If larger than 400 square feet, it requires frost-line footings.
  • If in one 100-year floodplain, the structure must be firmly anchored and vented.
  • A MHIC Licensed Contractor must be used

About the Application Process

To learn more about the application process, read the steps and watch the videos below, or view the FAQ or full tutorial video playlist.

 Apply for a Permit

Once you have reviewed the process outlined above and have gathered your required documentation, apply for your permit online using the button below.


Explore Permits, Approvals and Inspections


Contact Us

Department of Permits, Approvals and Inspections

County Office Building
111 West Chesapeake Avenue
Towson, Maryland 21204


Monday through Friday
8:30 a.m. to 4:30 p.m.



C. Pete Gutwald