Miami, FL Accessory Structures: ADU Owner Occupancy (2026)
Key Facts
- Ownership rule
- Same owner for house and ADU
- Rental condition
- Current homestead exemption required
- Governing zoning section
- Miami 21 § 3.18
- Enforcement/registration
- City Code § 2-214
- Renewal cycle
- Annual, with homestead re-proof
Summary
Miami requires an ancillary dwelling unit and the main house to stay under the same owner, and the ADU can only be rented while that owner holds a current homestead exemption on the property.
Ownership and Use As an ADU is a Residential Use, an ADU must be used as predominately permanent housing. The Single-Family Residence and the ADU shall be under the same ownership. An ADU may only be rented if the property has current proof of Homestead status. ADUs are subject to registration and annual renewal requirements of the City Code. When all of the following spaces are provided and are separate from the uses within the Principal Dwelling Unit, it shall be deemed an ADU. Sleeping / living area; and Shower / bathroom; and Kitchen that incorporates a sink, countertop for food preparation, and refrigerator. Unit Sizes See Article 6, titled ‘Supplemental Regulations’, Table 13; that sets out the minimum and maximum ADU unit sizes. Placement An ADU shall either be within the Principal Building or an Ancillary Building. See Article 5, titled ‘Specific to Zones’; that provides the specific Principal Building and Ancillary Building design standards and illustrations. A one-Story Ancillary Building may be attached or detached from the Principal Building and shall follow the Setbacks for Ancillary Buildings. A two-Story Ancillary Building: Detached from the Principal Building shall be separated by a minimum of ten (10) feet and shall follow the Setbacks for Ancillary Buildings. Attached to the Principal Building shall follow the Setbacks for the Principal Building. Height
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: Code of Ordinances: Supplement 23 | Ordinance 11000 (Previous Zoning Code): Supplement 22 | Miami 21 (Zoning Code): ?).
Full Breakdown
Miami 21 Section 3.18 ties every ADU to the principal home's ownership: the Single-Family Residence and the ADU must be under the same ownership, the unit must be used as predominately permanent housing, and it may only be rented while the property carries current homestead status. City Code Section 2-214 backs this with a registration system, owners submit a notarized disclosure statement, get an ADU registration certificate, and must prove homestead exemption again every year to renew it.
Violations & Fines
Losing homestead status while still renting the ADU, or a change of ownership without re-filing the disclosure statement, is grounds for the zoning administrator to deny or revoke the ADU registration certificate under City Code Section 2-214(g), on top of a Miami 21 zoning violation.
Frequently Asked Questions
Can I rent my Miami ADU to a tenant if I don't live in the main house?
What happens if I sell the house but keep renting the ADU under the old registration?
Sources & Official References
Other rules in Miami
Florida rules heatmap·Compare Miami to another location·View the Florida accessory structures overview
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