Everything homeowners ask about building an ADU in Orlando — answered with 2026 data.
Yes, ADUs are allowed in All R districts (R-1AA, R-1A, R-1, R-1N, R-2A, R-2B, R-3A-R-3D), MXD-1, MXD-2, O-1 and O-2, subject to the lot-size table in Sec. 58.501(C). PD districts case by case (ask City Planning); every residential lot in the Lake Nona PD qualifies. Not allowed on a lot that already has a duplex or tandem dwelling (Sec. 58.501(A)). in Orlando, FL. The maximum size for a detached ADU is 500 sq ft on a lot meeting the base minimum, or 1,000 sq ft on a larger lot in the R-1 districts (Sec. 58.501(C)); no code minimum size. House plus ADU floor area is capped at 0.50 FAR (0.40 in Colonialtown R-2A/T/SP), the ADU must be smaller than the house, and it may cover at most 35% of the backyard. Historic districts: 700 sq ft max by Certificate of Appropriateness. Lake Nona PD: 1,000 sq ft on any lot. Attached ADUs can be up to Same 500 / 1,000 sq ft tiers and 0.50 FAR cap as a detached unit. Orlando has an ADU-friendliness score of 7/10. Check our full Orlando ADU rules page for complete zoning details.
ADU construction in Orlando typically costs $150,000-$260,000. The cost per square foot averages $200-$260. Garage conversions are more affordable at $40,000-$80,000, while prefab ADUs cost $90,000-$200,000. Permit fees add Building permit: $64.94 for the first $1,000 of construction cost plus $4.32 per additional $1,000, plus about 10% in surcharges (fee schedule eff. Jan 2023); the city says ADU building-permit fees typically total $450-$1,050. Electrical, plumbing and mechanical permits are extra. to your budget. See our detailed Orlando ADU cost guide.
Detached ADUs in Orlando can be up to 500 sq ft on a lot meeting the base minimum, or 1,000 sq ft on a larger lot in the R-1 districts. Attached ADUs are limited to Same 500 / 1,000 sq ft tiers and 0.50 FAR cap as a detached unit. Junior ADUs (JADUs) have a cap of No JADU category in Orlando's code. A space without a full kitchen (sink, stove, refrigerator) is a spare bedroom, not an ADU; a unit that is an ADU must have a bedroom with an egress window, a full bath of at least 30 sq ft and a full kitchen (City Code Sec. 14.10-14.11 and the Florida Building Code). Maximum height is No ADU-specific cap: the district height limit applies, typically 30 or 35 ft (Ch. 58 Part 1B zoning tables). A two-story ADU is allowed behind a one-story house only if it is smaller in mass than the house. A detached ADU taller than 12 ft needs a 15 ft rear setback and 10 ft building separation; within 50 ft of a lake or wetland the limit is 12 ft (Sec. 58.901). You are allowed up to One ADU per lot on a qualifying lot.
Rear setback: Detached: 5 ft if the ADU is 12 ft tall or less (one story), 15 ft if taller (Sec. 58.901(c)); 5 ft separation from the house, 10 ft if over 12 ft tall. Attached: same as the house, 25 ft in R-1A, R-1, R-2A and R-2B (Ch. 58 Part 1B). A two-story ADU under 500 sq ft may ask for a rear-setback Modification of Standards (Sec. 65.302). Side setback: Same as the main house in every case (Sec. 58.901(d)): 7.5 ft in R-1A, 6 ft in R-1, 5 ft in R-2A and R-2B; 15 ft on the street side of a corner lot. Any ADU over 500 sq ft in R-2, R-3, MXD or O districts must meet tandem-development setbacks (Ch. 58 Part 3C). Open parking needs 2 ft from the side lot line. Front setback: No ADU in the front yard: a detached unit must sit beside or behind the house, never in front of the principal facade or in the front half of the lot (Sec. 58.901(b)). An attached ADU uses the house's front setback (Ch. 58 Part 1B). Required parking must sit behind the front and street-side setbacks. Note that garage conversions may be exempt from setback requirements if the existing structure is already within the setback area.
None for an ADU of 500 sq ft or less, as long as the house keeps its one code-compliant space (Sec. 58.501(F)(3)). Over 500 sq ft: one extra space, independently accessible from the street, behind the front setback, at least 20 ft from the street-side lot line and not enclosed in the house (Sec. 58.501(F)(2)). 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. The city states the main house and the ADU may each be owner-occupied or rented to a long-term tenant. Both must stay under one owner; the ADU cannot be sold separately unless the lot is split under the tandem rules (Sec. 58.516). 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 The city does not publish a fixed review time for ADU permits; check status in the Permitting Services portal. Budget extra time for Appearance Review, which must be approved before building permits (Sec. 58.501(D)). Plan check: Not published; ask Permitting Services (407.246.2271). Allow for pre-screen, routing and review of each trade permit. Pre-approved plans availability: None yet. The city plans a library of pre-reviewed 'prepackaged' ADU plans sold at a fixed price by the designing firm, expected fall/winter 2026.
Average ADU rental income in Orlando: 1-bedroom units rent for $1,400-$2,050/month, 2-bedroom units for $1,600-$2,400/month. Short-term rentals: Restricted: stays under 30 days need city home-share registration and are not allowed in every situation (orlando.gov/homeshare); a standard long-term lease is allowed. Expected ROI: 7-9% annual return.
The minimum lot size for an ADU in Orlando is Sec. 58.501(C): for an ADU up to 500 sq ft, R-1AA 10,000 sq ft; R-1A 7,700; R-1 6,000; R-1N, R-2A, R-3A, O-1 5,500; R-2B, R-3B, MXD-1 5,000; R-3C, R-3D, MXD-2, O-2 4,500. For up to 1,000 sq ft: R-1AA 15,000; R-1A 11,550; R-1 9,000; R-1N 8,250; other districts only as tandem development (Part 3C). No minimum in the Lake Nona PD. An undersized lot of record may seek a variance (ADU then capped at 500 sq ft). 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 $40,000-$80,000. The key advantages are lower cost (no foundation work), potential setback exemptions, and faster permitting. Read our complete garage conversion guide.
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