Tampa charges impact fees on residential construction including ADUs, although fees scale to floor area and are lower than for new primary dwellings. Categories include transportation, parks, school (assessed by Hillsborough County), water, and wastewater. Florida Statutes Chapter 163.31801 governs municipal impact fees and recently capped annual increases.
Tampa imposes impact fees under City Code Chapter 24 and Florida Statutes 163.31801. Categories: transportation impact fees (collected by City), parks and recreation, water and wastewater (Tampa Water Department), and Hillsborough County School Impact Fees. ADU rates are typically lower than for new primary dwellings due to smaller floor area and existing utility connections. Example combined fee for an 800 sq ft ADU: typically $5,000-$15,000 depending on location, with school impact fees often the largest single component. Florida HB 337 (2021) capped annual impact-fee increases at 50% over four years or 25% over two years and required phased increases. Where the ADU shares utilities with the primary dwelling, water and wastewater fees may be reduced or waived. Florida Statute 163.31801 requires impact fees to bear a rational nexus to the cost of new infrastructure attributable to development. Hillsborough County property reassessment will increase ad valorem property tax following construction.
Failure to pay impact fees blocks issuance of building permits and certificates of occupancy. Unauthorized utility connections result in disconnection by Tampa Water and penalty billing. Unpermitted construction discovered later faces doubled fees plus enforcement.
Tampa, FL
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See how Tampa's adu impact fees rules stack up against other locations.
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