Howard County, MD Accessory Structures: Garage Conversions (2026)
Garage conversion rules in Howard County, MD, sometimes called garage-to-ADU or accessory living unit conversions, govern permits, ceiling height, egress, and parking replacement.
Key Facts
- Governing rule
- Zoning Section 128.0.12
- Kitchens/baths in garages
- Not permitted
- Living space path
- Accessory apartment (128.0.13)
- Permit issuer
- Planning and Zoning / DILP
- Owner occupancy
- Required for apartment
Summary
In Howard County a detached garage is an accessory structure that cannot contain a full bathroom, full kitchen, or living quarters. Converting a garage into a dwelling requires meeting the accessory-apartment rules under Section 128.0.13 and a Department of Planning and Zoning permit.
Restrictions for accessory structures. Full baths, full kitchens, residential habitation and commercial uses are not permitted in accessory structures.
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: Code of Ordinances: Supplement 91 | Zoning: Supplement 25).
Full Breakdown
Zoning Regulations Section 128.0.12.b provides that full baths, full kitchens, residential habitation, and commercial uses are not permitted in accessory structures. A detached garage therefore cannot be finished into an independent living unit without first qualifying as an accessory apartment. To create legal living space, the conversion must comply with Section 128.0.13, which requires the unit to be within an owner-occupied dwelling, limits its floor area, and requires a permit issued by the Department of Planning and Zoning based on a scaled floor plan. Building permits from the Department of Inspections, Licenses and Permits are also required for structural work. An unpermitted second kitchen or dwelling in a garage is a zoning violation.
Violations & Fines
An unpermitted garage conversion with a kitchen or living quarters is a zoning violation; the county may order removal of the kitchen and restoration of the space plus penalties.
Frequently Asked Questions
Can I turn my garage into an apartment?
Why can't I add a kitchen to my detached garage?
Sources & Official References
Other rules in Howard County
Compare Howard County to another location·View the Maryland accessory structures overview
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