Accessory Structures in Miami, FL (2026)
9 verified accessory structures rules for Miami, Florida, sourced directly from the municipal code and official government pages.
Verified from official government sources
ADU Rules
The City of Miami allows ADUs in T3-L transect zones under Miami 21 with maximum 450 sq ft. Owner occupancy required (homestead exemption). Proposed expansions to T3-R and T3-O zones. One ADU per property.
Miami ADU Rules
Some RestrictionsADU Permits
Miami permits accessory dwelling units in most transect zones under Miami 21, the city's form-based zoning code. Permits are issued by the City of Miami Building Department after Planning and Zoning review under Article 4 (Standards and Tables). Florida HB 1031 (effective July 2024) requires local governments to allow ADUs in single-family zones.
Miami ADU Permits (Miami 21 Article 4 Table 4 + Florida HB 1031 (2024))
Some RestrictionsADU Impact Fees
Miami ADUs are subject to Miami-Dade County impact fees (roads, schools, parks, police, fire) tied to the new dwelling unit, plus City of Miami building permit and plan-review fees. The County's impact fee schedule is set in Miami-Dade Code Chapter 33E. Florida law caps annual increases to county impact fees.
Miami ADU Impact Fees (Miami-Dade County Plus City Fees)
Some RestrictionsADU Owner Occupancy
Miami 21 does not require the property owner to live on-site to operate an ADU. Florida HB 1031 (2024) further restricts local governments from imposing owner-occupancy mandates on accessory dwelling units. Recorded deed restrictions in some HOAs may still impose private occupancy rules.
Miami ADU Owner-Occupancy (Not Required by City; FL HB 1031 Preempts)
Few RestrictionsADU Rental Restrictions
ADUs rented long-term (30+ days) in Miami face no zoning-based restrictions. Short-term rentals (under 30 days) are sharply restricted: in T3 single-family transect zones, City of Miami STR ordinance §2-1100 prohibits non-owner-occupied vacation rentals. Florida Statute §509.032(7) preempts local STR licensing but allows registration.
Miami ADU Rental Restrictions (City of Miami STR Ordinance + Miami 21)
Some RestrictionsShed Rules
Utility sheds in the City of Miami follow Miami-Dade Section 33-20(k): one shed up to 400 sq ft per lot. Sheds under 100 sq ft have reduced setbacks. All sheds must meet HVHZ wind load and anchoring requirements.
Miami Shed & Utility Shed Rules
Some RestrictionsGarage Conversions
Garage conversions to ADUs in the City of Miami require building permits and HVHZ compliance. Miami 21 governs ADU eligibility by transect zone. Impact-resistant openings mandatory. Licensed contractors required.
Miami Garage Conversion Rules
Some RestrictionsCarport Rules
Miami requires building permits for carport construction. Carports must comply with Florida Building Code wind load requirements, zoning setbacks, and lot coverage limits. The high-velocity hurricane zone standards add additional structural requirements.
Miami Carport Building Requirements
Some RestrictionsTiny Homes
Miami regulates tiny homes as accessory dwelling units or primary structures depending on size and lot placement. Tiny homes on foundations must meet Florida Building Code HVHZ standards. Tiny homes on wheels are classified as recreational vehicles with separate parking restrictions.
Miami Tiny Home Regulations
Some RestrictionsLooking for Miami-Dade County county-wide rules?
County ordinances apply to unincorporated areas and may supplement Miami city rules.
Accessory Structures in Miami-Dade County →