ADU rules in Boynton Beach, FL — also called accessory dwelling unit regulations or granny flat ordinances — cover setbacks, owner-occupancy, parking, and permit requirements.
Boynton Beach allows accessory dwelling units in select single-family zoning districts as conditional uses. ADUs must be under 800 sq ft, share water and sewer with primary residence, and provide one additional parking space.
Land Development Regulations Chapter 3 Article IV permits ADUs in R-1-AA, R-1-A, and R-1 districts with a conditional use permit. Owner must occupy either the primary unit or the ADU. Short-term rental of the ADU is allowed only where the city's STR registration is in place per FL §509.032. ADUs must meet Florida Building Code wind load requirements (140 mph design wind speed for Palm Beach County coastal zone). Detached ADUs count toward lot coverage and must observe 5-foot side and 10-foot rear setbacks.
Unpermitted ADU: stop work plus permit-after-the-fact double fee. Use without required parking: $250 citation. Renting to a third party while not owner-occupied: conditional use revocation.
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