Orange County ADU Rules (2026)
Everything Orange County, Florida homeowners need to know about building an accessory dwelling unit: current ordinance, permit process, and costs.
Orange County ADU Rules (2026) — quick facts
Detailed rules
| Max ADU size | 1,000 sq ft OR 45% of primary dwelling living area, whichever is less; 1,500 sq ft for lots ≥ 2 acres; minimum 500 sq ft; no more than 2 bedrooms |
|---|---|
| Min lot size | Varies by zoning district; generally 6,000 sq ft in R-1 |
| Setbacks | For detached accessory structures (includes ADUs) 15 ft or less in height: 5 ft from any side or rear lot line, 15 ft from any side street lot line. For those over 15 ft (up to the 2-story/25 ft max): 10 ft from the rear property line, with side and side street setbacks matching the primary structure's required setbacks. Attached ADUs follow the primary dwelling's own setbacks. Additional limits apply near the Normal High Water Elevation contour (§ 38-1501, footnote A). |
| Parking | 1 additional off-street space required |
Permit process
| Permit office | Orange County Planning Division + Building Division |
|---|---|
| Phone | (407) 836-5600 |
| Online portal | https://fasttrack.ocfl.net/ |
| Typical timeline | 8–14 weeks from application to final inspection |
| Typical fees | $7,500–$11,000 combined for a 600 sq ft ADU: permit $1,800–$3,500, plus school/road/parks/fire impact fees $5,700–$7,500+ |
Cities in Orange County ADU Rules (2026)
Incorporated cities may have rules that differ from the county. Click a linked city for its specific ordinance.
- Orlando — City of Orlando has its own ADU code — see city page.
- Apopka — Municipal code applies within city limits.
- Winter Park — Historic district overlays may restrict ADU placement.
- Ocoee
- Winter Garden
- Maitland
- Belle Isle
Orange County covers Orlando, Apopka, Winter Park, Ocoee, Winter Garden, Maitland, and Belle Isle, plus a large unincorporated area. If your parcel is inside a city’s limits, the city ordinance governs; jump to the city list below. If you are in unincorporated Orange County, this page covers your rules.
Incorporated cities in Orange County with their own ADU rules:
- Orlando ADU Rules (2026): incentive rebates up to $14,400; no owner-occupancy requirement
- Winter Park ADU Rules (2026): strict STR ban; high combined impact fees; confirm standards before designing
The Orange County Code of Ordinances (Chapter 38) permits detached, attached, and conversion ADUs in most residential zoning districts, subject to size limits, parking, and owner-occupancy requirements. This is the operative rule for 2026 and is not expected to change on a state-mandated timeline. The 2026 legislative session’s ADU preemption bill (SB 48) did not become law. See our post-mortem on why SB 48 died for the full legislative record, and the Florida ADU law pillar for the statewide legal picture.
Ready Set Orange: the county’s pre-approved ADU floorplans
Since August 2024, Orange County has given away pre-designed, code-reviewed building plans to qualifying owners in unincorporated Orange. The program is called Ready Set Orange, and it covers eight floorplans: four single-family houses and four accessory dwelling units. The plans themselves cost nothing. Because the county has already reviewed them, your submission skips the portion of plan review a from-scratch design would go through, though the county publishes no specific reduced-timeline figure.
| Plan | Size | Configuration |
|---|---|---|
| Clementine | 531 sq ft | 1 bed / 1 bath |
| Mandarin | 610 sq ft | 1 bed / 1 bath |
| Tangerine | 628 to 708 sq ft | 1 bed / 1 bath, two levels |
| Seville | 700 sq ft | 1 bed / 1 bath |
Each of these sits under the county’s 1,000 sq ft ceiling by design, so the plans clear Chapter 38 without a variance.
Eligibility is narrower than the ordinance itself. The program applies only in unincorporated Orange County, the property must be homesteaded, and the primary dwelling and the ADU have to remain under single ownership. You still hire a design professional to finalize the documents for your specific lot, and you still permit through Fast Track. A pre-approved plan removes the design step, not the permit.
The Ready Set Orange page states an ADU may not exceed fifty percent of the primary dwelling’s living area or 1,000 sq ft. The zoning code, Section 38-1426, sets the limit at forty-five percent or 1,000 sq ft, whichever is less. The code governs. We verified the codified text directly in August 2026; its most recent amendment is Ordinance 2016-19, adopted September 13, 2016.
Design to the 45 percent figure. If your primary dwelling has 1,800 sq ft of living area, that is 810 sq ft of ADU, not 900. The gap is wide enough to invalidate a floorplan choice late in the process, and the 50 percent number has been repeated by several builder and marketplace sites that took it from the program page.
Our full walkthrough covers eligibility, the request process, what a licensed architect still has to do, and the optional Certified Affordable/Attainable layer that adds expedited review and a utility fee discount: Ready, Set, Orange: Orange County’s free pre-approved ADU floor plans. The county’s own program page and request form are at ocfl.net. Confirm the current plan list and any program-specific rental restrictions with the Planning Division before committing, since program terms can change independently of the ordinance.
What to do next
If you are planning an ADU project in unincorporated Orange County, the practical sequence is: pull your survey and deed restrictions, call the Orange County Planning Division at (407) 836-5600 to confirm your parcel’s zoning and eligibility under Chapter 38, and work the current ordinance as it stands. There is no state law coming into effect that would materially change permit timing in 2026.
For most homeowners, the binding constraint will not be the ordinance — it will be the HOA covenants. Orange County’s master-planned communities (Avalon Park, Baldwin Park, Lake Nona, Hamlin) are generally deed-restricted against accessory structures, and no state law preempts HOA covenants. Pull your covenants before investing in site plans.