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Montgomery County Maryland
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 Department of Housing and Community Affairs
Accessory Apartments

Accessory Apartments

Accessory Apartments

  • An accessory apartment is a completely independent living facility with separate cooking, eating, sanitation and sleeping facilities that is either in or added to an existing single-family dwelling or in a separate accessory structure on the same lot as an existing dwelling.
  • There is a separate application process for accessory apartments, commonly referred to as "mother-in-law" apartments.
  • There are zoning and code enforcement requirements that must be met before renting an Accessory Apartment.
  • These units may only be located in owner-occupied single family detached homes and the property owner must be granted a special exception by the Board of Appeals.
  • Any property owner interested in this program should contact the Licensing and Registration unit for details.

Registered Living Units

  • Registered Living units are similar to accessory apartments, except that the units are occupied rent-free by either a relative or household employee of the owner occupant.

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Last edited: 5/13/2005