Everything homeowners ask about building an ADU in Orlando — answered with 2026 data.
Yes, ADUs are allowed in Residential single-family zones in Orlando, FL. The maximum size for a detached ADU is 1,000 sq ft max, 500 sq ft min; must be smaller than the principal structure (varies by sector). Attached ADUs can be up to 1,000 sq ft max, 500 sq ft min; must be smaller than the principal structure. Orlando has an ADU-friendliness score of 6/10. Check our full Orlando ADU rules page for complete zoning details.
ADU construction in Orlando typically costs $130,000-$260,000. The cost per square foot averages $145-$290. Garage conversions are more affordable at $60,000-$145,000, while prefab ADUs cost $90,000-$210,000. Permit fees add $2,800-$4,500 to your budget. See our detailed Orlando ADU cost guide.
Detached ADUs in Orlando can be up to 1,000 sq ft max, 500 sq ft min; must be smaller than the principal structure (varies by sector). Attached ADUs are limited to 1,000 sq ft max, 500 sq ft min; must be smaller than the principal structure. Junior ADUs (JADUs) have a cap of 500 sq ft. Maximum height is Confirm with City of Orlando Planning — ADU must be smaller in mass than and no taller than the principal structure (2-story ADU allowed behind a 1-story home if smaller in mass). You are allowed up to 1 ADU per lot on a qualifying lot.
Rear setback: 15 feet. Side setback: 5 feet. Front setback: 20 feet. Note that garage conversions may be exempt from setback requirements if the existing structure is already within the setback area.
1 space for ADU. Many cities and states have been relaxing ADU parking requirements in recent years. In California, no additional parking is required for ADUs near transit.
Not required by the City of Orlando — Orlando removed owner-occupancy (note: surrounding unincorporated Orange County still requires owner occupancy). Note that owner-occupancy rules vary by state law — California and several other states have eliminated this requirement for standard ADUs.
The ADU permit review timeline in Orlando is typically 60-85 days. Plan check: 2-3 weeks. Pre-approved plans availability: Available for select ADU types.
Average ADU rental income in Orlando: 1-bedroom units rent for $1,200-$1,750/month, 2-bedroom units for $1,550-$2,300/month. Short-term rentals: Limited in some zones. Expected ROI: 7-9% annual return.
The minimum lot size for an ADU in Orlando is Varies by district and ADU size: roughly 4,500-10,000+ sq ft (R-1 requires 6,000 sq ft for ADUs up to 500 sq ft; larger ADUs need bigger lots). This applies to detached ADUs — garage conversions and JADUs may have different or no lot size requirements.
Garage conversions are one of the most popular and affordable ADU options. In Orlando, a garage conversion typically costs $60,000-$145,000. The key advantages are lower cost (no foundation work), potential setback exemptions, and faster permitting. Read our complete garage conversion guide.