ADU rules in Dunedin

Accessory dwelling units are permitted on any lot with one single-family detached home and may be either attached or detached from the principal dwelling on the same parcel.

Sec. 107-21.1 expressly allows the ADU to be either attached or detached to the principal dwelling; Appendix A also defines an accessory dwelling as an accessory detached dwelling unit or an accessory apartment.

The 800 sq ft GFA cap applies only to the portion of a structure that constitutes living area for the accessory dwelling (Sec. 107-21.3). Height is capped at two stories or the principal dwelling's height, whichever is less (Sec. 107-21.4(B)).

The property owner (title holder) must occupy either the principal dwelling or the ADU as a permanent homesteaded residence, evidenced by voter registration, vehicle registration, or similar means, and must sign a notarized affidavit to that effect recorded with the clerk of the circuit court.

The ADU regulations (Secs. 107-21 through 107-21.6) are silent on parking, and searches of the parking division (Sec. 105-24) found no ADU line item. The two-space rule is the general residential site standard in Sec. 105-27.1.1.1(b)(1); whether an ADU triggers additional spaces is not stated in the code text reviewed.

Sec. 107-21.1 states ADUs 'are permitted on any lot with one single-family detached home'; no conditional use permit or public hearing is required by the ADU sections. The occupancy affidavit (Sec. 107-21.5(D)) is the only special approval step named in the ordinance.

Sec. 107-21.5(A) caps ADU occupancy at three individuals, two of whom must be immediate family. Sec. 107-21.5(C) applies the city's short-term occupancy rules per zoning district to ADUs; under Sec. 103-14.4 rentals under three months (90 days) are not allowed in residential districts, and vacation rentals in the districts that allow transient uses (Sec. 103-14.5) require city registration and a certificate of compliance (Sec. 103-14.7.2).