ADU Rules: Annapolis vs Pasadena
How do adu rules rules compare between Annapolis, MD and Pasadena, MD?
Annapolis and Pasadena have similar restriction levels.
Annapolis, MD
Anne Arundel County
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.
View full Annapolis rules →Pasadena, MD
Anne Arundel County
Anne Arundel County updated its ADU rules in 2023 to allow ADUs in most residential districts without additional parking requirements. ADUs require a building permit and must not exceed 800 sq ft or 50% of the primary dwelling. No parking requirement for most ADUs.
View full Pasadena rules →Key Facts Comparison
| Fact | Annapolis | Pasadena |
|---|---|---|
| Max Size | 700 sq ft or 50% primary | 800 sq ft or 50% primary dwelling |
| Approval | Special exception required | - |
| Historic District | HPC design review | - |
| Owner Occupancy | Primary or ADU required | - |
| Parking | - | No extra parking required (most zones) |
| Fire Separation | - | 1-hour wall if no connection to primary |
| Excluded Zones | - | R22 and some Critical Area zones |
Highlighted rows indicate differences between cities.
Annapolis FAQ
Can I convert my carriage house to an ADU in Annapolis?
Yes, with a special exception and, in the Historic District, HPC design review approval. Building permit is also required.
How big can my Annapolis ADU be?
The smaller of 700 sq ft or 50% of the primary dwelling's floor area.
Pasadena FAQ
Can I build an ADU in Anne Arundel County?
Yes in most residential zones after the 2023 update. ADUs are permitted up to 800 sq ft with a building permit. No extra parking required.
Can I rent my ADU to someone other than family?
Yes. Anne Arundel County allows non-family ADU rentals. Non-owner-occupied STR registration applies if rented short-term.
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