ADU Rules in Hagerstown, Maryland

Hagerstown is the Washington County seat with a population of about 43,000 in western Maryland, approximately 75 miles west of Baltimore and 70 miles northwest of Washington DC. As an incorporated city, Hagerstown has its own Zoning Ordinance separate from Washington County's regulations. Known as the "Hub City" for its position at the intersection of several major travel corridors, Hagerstown has a historic downtown and significant industrial heritage.

Hagerstown vs. Washington County

• City of Hagerstown: Incorporated city with own Zoning Ordinance — use the city's permit process
• Washington County: Separate jurisdiction for unincorporated areas
• Verify which jurisdiction your property falls in

City of Hagerstown Zoning Ordinance

The City of Hagerstown Zoning Ordinance governs all land use within Hagerstown city limits.

Maryland ADU Rules

ADU rules in Maryland are set by each county and municipality. Verify current ADU requirements with the City of Hagerstown Planning Division.

Permitted ADU Types

Per Hagerstown Zoning Ordinance (verify current standards):

• Accessory apartments: Within or attached to primary structure
• Detached ADUs: In eligible residential zones

Verify current provisions with Hagerstown's Department of Community and Economic Development.

Setbacks

Per Hagerstown residential zone:

• Rear: Minimum setback
• Side: Minimum setback

Antietam Creek / Conococheague Creek Flood Zones

Parts of Hagerstown near Antietam Creek or Conococheague Creek may be in FEMA flood zones. Verify flood map status for properties near waterways.

Historic Districts

Hagerstown has a historic downtown area. Properties in or near the historic district may require review for exterior modifications.

Chesapeake Bay Watershed

Hagerstown is in the Chesapeake Bay watershed (Antietam Creek/Potomac River drainage). Stormwater management requirements may apply.

Permit Process

1. Verify jurisdiction: Confirm your property is within Hagerstown city limits (not Washington County)
2. Verify zoning: Hagerstown Department of Community and Economic Development
3. Historic review: If in a historic district
4. Check flood zone: If near Antietam or Conococheague creeks
5. Submit plans: Hagerstown Permit Office
6. Building permit and inspections
7. CO: Required before occupancy

Contact

City of Hagerstown Department of Community and Economic Development 1 East Franklin Street, Hagerstown, MD 21740 Phone: (301) 790-3160 Website: hagerstownmd.org

Disclaimer: Hagerstown city and Washington County are separate jurisdictions. ADU rules are evolving following Maryland's 2024 statewide legislation. Verify current standards with the City of Hagerstown before starting any project.