Takoma Park, MD Accessory Structures: ADU Rules (2026)

Accessory dwelling units are permitted in Takoma Park under Montgomery County Zoning Ordinance Section 59.3.1.6 and reinforced by Maryland HB 1045 (2024) which requires jurisdictions to allow ADUs on single-family lots. ADUs may be attached to the principal dwelling (such as a basement apartment or addition) or detached (a separate structure in the rear yard). Detached ADUs are limited to 50 percent of the gross floor area of the principal dwelling or 1,200 square feet, whichever is less. The maximum height for a detached ADU is typically 25 feet. ADUs must meet accessory structure setbacks, generally 5 feet from side and rear property lines for structures under a certain height. Each ADU must include a separate entrance not facing the front of the principal dwelling (for detached units), a kitchen, a bathroom, and living space. One additional off-street parking space may be required unless the property is within one-half mile of a transit station, which applies to much of Takoma Park given proximity to the Takoma Metro station. Owner occupancy of either the principal dwelling or the ADU is generally required. ADUs may be rented but are subject to Takoma Park rent stabilization laws if the landlord owns more than one rental unit. Building permits through Montgomery County DPS are required. Contact Takoma Park Housing and Community Development at 301-891-7119 for local guidance.