Maryland Zoning & Land Use Guide
Last updated: Verified:
Comprehensive guide to Maryland zoning laws, building codes, and land use regulations.
Key Facts
- Building Code: Maryland Building Performance Standards (based on 2021 IBC)
- State ADU Law: Yes — ADU-friendly
- ADU Details: HB 1337 (2024) requires counties and municipalities to permit accessory dwelling units on lots with single-family detached homes. The law limits local governments from imposing overly restrictive requirements such as additional parking mandates, owner-occupancy conditions, or minimum lot size thresholds that would effectively prohibit ADU construction.
Cities in Maryland
Annapolis
Pop.
ADU: Restricted
Baltimore
Pop.
ADU: Restricted
Bethesda
Pop.
ADU: Restricted
Bowie
Pop.
ADU: Restricted
College Park
Pop.
ADU: Restricted
Columbia
Pop.
ADU: Restricted
Dundalk
Pop.
ADU: Restricted
Ellicott City
Pop.
ADU: Restricted
Frederick
Pop.
ADU: Restricted
Gaithersburg
Pop. 71,026
ADU: Allowed
Germantown
Pop. 91,473
ADU: Allowed
Glen Burnie
Pop. 72,891
ADU: Allowed
Hagerstown
Pop. 43,665
ADU: Restricted
Odenton
Pop. 47,536
ADU: Restricted
Rockville
Pop. 67,117
ADU: Restricted
Salisbury
Pop. 33,616
ADU: Restricted
Severn
Pop. 57,118
ADU: Restricted
Silver Spring
Pop. 81,000
ADU: Restricted
Towson
Pop. 59,533
ADU: Restricted
Waldorf
Pop. 81,410
ADU: Restricted
Disclaimer: The information on this website is provided for general informational purposes only and does not constitute legal, financial, or professional advice. Always verify current requirements with your local planning department.