Orlando, FL Accessory Structures: ADU Impact Fees (2026)

Chapter 56 is Orlando's Transportation Impact Fee ordinance, charged on new development that generates additional vehicle trips, and Sec. 501(G) cross-references it for ADUs with a one-line pointer: "Impact fees. " Sec. 06(K) supplies the actual ADU-specific rule: the transportation impact fee for an ADU development permit is based on the additional conditioned-space square footage the ADU adds to the existing single-family conditioned-space square footage, and if that new total does not exceed the next tiered single-family rate, no additional impact fee is due. In practice, the fee calculation does not treat the ADU as a separate dwelling unit generating its own trips; it instead measures how much conditioned floor area the ADU adds to the parcel's existing single-family square footage and applies the Sec.

07 Transportation Impact Fee Rate Schedule (Exhibit A) -- a dollar-per-unit-of-development table indexed annually for inflation, capped at 3% per year under Sec. 07(C) -- to that increment. If the added square footage keeps the property within its current single-family rate tier on that schedule, the Transportation Impact Fee Coordinator assesses no additional fee at all. Larger ADUs that push the home's total conditioned space into a higher tier owe the fee only on the difference between tiers, not on the ADU's full assessed value as a stand-alone unit.

The fee is administered by the City's Transportation Planning Division and, per Sec. 05, no development permit for the ADU may be issued until any fee that is owed has been paid.