Prince George's County, MD Accessory Structures: Garage Conversions (2026)
Garage conversion rules in Prince George's County, MD, sometimes called garage-to-ADU or accessory living unit conversions, govern permits, ceiling height, egress, and parking replacement.
Key Facts
- Permitting
- DPIE building permit required
- Separate dwelling
- Not allowed (no ADUs)
- Accessory use cap
- 20% of dwelling floor area
- Zoning
- 2022 Ordinance, Subtitle 27
Summary
Converting a garage into living space in Prince George's County requires DPIE building permits and must meet the 2022 Zoning Ordinance. Because accessory dwelling units are not permitted, a converted garage cannot become a separate, independent dwelling with its own kitchen.
Unless otherwise specifically permitted, an accessory use in a residential dwelling in a Rural and Agricultural or Residential base zone shall be limited to twenty percent (20%) of the gross floor area of the dwelling.
Full Breakdown
DPIE issues building permits for conversions, and the M-NCPPC 2022 Zoning Ordinance (Subtitle 27) controls how the space is used. Because the county does not currently permit accessory dwelling units, a garage conversion may not create a second independent dwelling unit (with a separate kitchen and its own entrance) on the lot. Section 27-5203(a)(2) limits an accessory use inside a residential dwelling in a Rural and Agricultural or Residential base zone to 20 percent of the dwelling's gross floor area, which constrains a home occupation in the converted space. A guest house is the only accessory living space recognized in residential zones. Converted space must still meet building-code requirements for habitable rooms.
Violations & Fines
Converting a garage to a separate rental dwelling, adding a second kitchen to create an ADU, or finishing living space without permits can trigger DPIE stop-work orders, denial of occupancy, fines, and orders to restore the space.
Frequently Asked Questions
Can I turn my garage into a rental apartment?
Do I need a permit to finish my garage?
Sources & Official References
Other rules in Prince George's County
Compare Prince George's County to another location·View the Maryland accessory structures overview
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