Frisco, TX Accessory Structures: ADU Rental Restrictions (2026)

03 of Frisco's zoning ordinance permits a Garage Apartment or Guest House as an incidental accessory use on a single-family lot, but it treats the accessory unit as inseparable from the property it sits on. Subsection (C), titled Rental, opens with the restriction at (C)(1): the unit may not be sold separately from the sale of the entire property, including the main dwelling unit. That bars a fee-simple subdivision, condominium conversion, or any deed transfer that would let a garage apartment or guest house change hands without the main house going with it, a mechanism that in effect keeps the lot as a single ownership unit even though two dwellings sit on it.

The rule sits alongside a related but distinct requirement at (C)(2), that any rental of the accessory unit is conditioned on the main dwelling being owner-occupied, and a location standard at (A) requiring a Garage Apartment be built attached to a garage while a Guest House stands separate from the main dwelling. 1, which sets the Guest House or Garage Apartment setback the same as the primary structure on front, side and rear yards. Because the restriction runs with the land rather than expiring, it binds subsequent owners too: a buyer cannot later carve off the accessory unit and sell it as a separate lot or condominium unit, even after the main house and the garage apartment change hands together to different owners over time.