Maryland ADU Permits to Completion: A Homeowner’s Step-by-Step Guide
Move from ADU plans and applications through review comments, construction inspections, final approvals and handover—with local requirements clearly separated.
Move from ADU plans and applications through review comments, construction inspections, final approvals and handover—with local requirements clearly separated.
North Beach has its own municipal accessory-apartment rules. See the current 5,000-sq-ft lot minimum, 800-sq-ft detached cap, parking and owner-occupancy rules, the Calvert County permit split, and the 2026 HB 1466 transition.
Laurel is actively creating its own ADU rules through Ordinance 2057 / Text Amendment 270. See the September 15, 2026 Planning Commission hearing, current city zoning authority, permit path, and what homeowners should verify before relying on proposed rules.
Takoma Park does not have its own ADU zoning. Montgomery County controls zoning and building review, while the City adds municipality-letter, tree, stormwater, historic-district and rental-licensing requirements.
Gaithersburg has its own ADU zoning rules separate from Montgomery County. See the current 49% attached-unit cap, detached limits, parking, setbacks, short-term-rental ban and 2026 HB 1466 conflict.
Rockville has its own ADU rules separate from Montgomery County. See the 75% size rule, owner-occupancy requirement, no-parking rule, detached ADU standards, permits and rental licensing.
Allegany County’s current zoning code separates residential accessory apartments from commercial/industrial accessory dwelling units. See what applies now, why HB 1466 creates a 2026 transition, and what homeowners should verify before planning an ADU.
Kent County’s current ADU framework allows one accessory dwelling in several County zoning districts. See owner-occupancy, parking, rental, permit and town-jurisdiction rules, plus the remaining HB 1466 parking question.
Garrett County is unique in Maryland because it has no countywide zoning. Learn what applies outside zoned areas, what changes in the Deep Creek Watershed and incorporated towns, and what HB 1466 means for 2026 ADU planning.
Dorchester County still publishes a legacy accessory-apartment framework with an 800-sq-ft/one-third size cap, owner occupancy and one extra parking space. See how those rules compare with Maryland HB 1466, plus septic, floodplain and Cambridge jurisdiction checks.