The maximum allowable size for an Accessory Dwelling Unit (ADU) in Florida

The maximum allowable size for an Accessory Dwelling Unit (ADU) in Florida can vary based on local regulations and zoning ordinances, which differ from one municipality to another. However, some standard guidelines and limitations can provide a general understanding.

General Guidelines for Maximum ADU Size in Florida

  1. State-Wide Regulations:Florida does not have a state-wide maximum size for ADUs. The regulations are typically set at the county or city level.
  2. Local Zoning Ordinances:Many local jurisdictions set the maximum size of an ADU based on the size of the primary residence or the lot. Common limitations include:
    • No more than 50% of the size of the primary residence.
    • Capping the ADU size at specific square footage, ranging from 600 to 1,200 square feet.
  3. Example City Regulations:
    • Miami-Dade County: ADUs are generally limited to a maximum of 700 square feet.
    • Orlando: The maximum size for an ADU is often set at 1,200 square feet or 50% of the primary residence, whichever is smaller.
    • Tampa: Typically, the size limit is 900 square feet or 50% of the primary residence, up to 1,200 square feet.
  4. Setback and Lot Coverage Requirements:Besides size limitations, ADUs must comply with setback and lot coverage requirements, which can affect the maximum allowable size.
  5. Building Code Compliance:ADUs must meet local building codes and standards, which may influence the design and maximum size.
To determine the specific maximum allowable size for an ADU in your area, complete the form, and we’ll let you know. Florida ADU Services will be familiar with local regulations. We provide precise information and guidance tailored to your property and location.
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