ADU rules in Annapolis, MD — also called accessory dwelling unit regulations or granny flat ordinances — cover setbacks, owner-occupancy, parking, and permit requirements.
Annapolis allows ADUs through a special exception process. ADUs limited to 700 sq ft or 50% of primary dwelling, whichever is less. Historic District ADUs require HPC design review. Owner occupancy of primary or ADU required.
Annapolis permits accessory dwelling units (ADUs) as special exceptions in residential zones. ADUs may not exceed 700 square feet or 50% of the primary dwelling's floor area. The owner must occupy either the primary residence or the ADU. Historic District ADUs require Historic Preservation Commission design review for architectural compatibility. Many historic Annapolis properties have existing carriage houses or coach houses that can be converted to ADUs. One off-street parking space must be provided for the ADU. The city is reviewing its ADU ordinance in light of Maryland's 2023 housing legislation (HB 1045). A building permit is required.
Unpermitted ADU: stop-work order and $500/day. Occupancy without certificate of occupancy: $250/day.
Annapolis, MD
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Side-by-side rule comparisons with other cities in Anne Arundel County.
See how other cities in Anne Arundel County handle adu rules.
See how Annapolis's adu rules rules stack up against other locations.
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