Dixie Village

Orange County (Florida, not California) regulates accessory dwelling units on parcels in the unincorporated county through Orange County Code Chapter 38 (Zoning) as amended. Unlike several other Florida counties that still use 'guest house' / 'accessory living quarters' terminology, Orange County explicitly uses the term 'Accessory Dwelling Unit' and has been a recent Florida leader in modernizing its ADU framework. Florida has no mandatory statewide ADU preemption — § 163.31771 Fla. Stat. is permissive only — so Orange County's approach is a genuine local policy choice. As of 2026-04-20, Orange County permits one ADU per single-family parcel in most residential zoning districts (R-1AA, R-1A, R-1, R-2, R-3, as well as A-1 Rural and A-2 Rural Suburban) subject to size caps (typically 800 sqft or 40% of primary, whichever is less; some districts allow up to 1,000 sqft), setback conformance, height matching the primary structure, and design standards including a requirement that the ADU architecturally complement the primary dwelling. Owner-occupancy of either the primary or the ADU is required. The ordinance permits internal ADUs, attached ADUs, and detached ADUs. Most notably, Orange County partners with the Orange County Housing Finance Authority (OCHFA) / Orange County Housing Finance Trust to operate the Affordable ADU Loan Program, which is the leading local ADU financing program in Florida — this program is covered in detail under relatedPrograms below. Pending 2026 state legislation (SB 48 / HB 313) would preempt sub-1,000-sqft caps and single-family-zone ADU bans; Orange County's framework is largely conforming but its 800-sqft cap in some districts would need upward adjustment.

• Orange County Code of Ordinances Chapter 38 — Zoning (ADU provisions)
• Orange County Comprehensive Plan — Future Land Use Element and Housing Element
• Orange County Board of County Commissioners — agenda archive

State-floor overlay: Florida has no mandatory statewide ADU preemption. § 163.31771 Fla. Stat. is permissive only. Pending 2026-session SB 48 / HB 313 would preempt sub-1,000-sqft caps and single-family-zone ADU bans effective December 1, 2026 if enacted. For Orange County, enactment would force upward revision of the 800-sqft cap in some districts to at least 1,000 sqft and would preempt any utility-sharing or owner-occupancy conditions — though owner-occupancy is specifically tied to the Affordable ADU Loan Program as a program-eligibility criterion, not a zoning criterion, which may survive preemption. The Live Local Act (SB 102 2023 / SB 328 2024) applies to commercial / industrial / mixed-use zones; Orange County has been an active Live Local Act implementer in its International Drive tourist-commercial corridor, but Live Local does not directly bear on single-family ADUs. Florida HOA, condominium, and cooperative statutes (Ch. 720, 718, 719) do NOT preempt association-level restrictions — Orange County has many HOA-governed communities (Hunters Creek, Lake Nona, Dr. Phillips, Windermere-adjacent, Winter Garden-adjacent) where HOA covenants can bar ADUs regardless of county zoning.

Orange County administers or co-administers several overlay regimes that materially affect ADU siting on unincorporated parcels: (1) FEMA Special Flood Hazard Areas (SFHA) along the Kissimmee River chain (southern Orange / Osceola border), St. Johns River (eastern Orange border), Lake Apopka (western Orange), the Butler Chain of Lakes (Dr. Phillips / Windermere-adjacent unincorporated), Little Econlockhatchee and Econlockhatchee Rivers, and hundreds of named and unnamed lakes; Orange County is a CRS Class 5 community giving NFIP policyholders a 25% premium discount; (2) Florida Building Code Wind Borne Debris Region — all of Orange County at 140 mph ultimate wind-load design (lower than coastal counties); (3) Airport Land Use Compatibility — Orlando International Airport (MCO) Airport Influence Area covers substantial unincorporated southern Orange County with FAA Part 77 obstacle limits, CFR Part 150 noise contours, and safety-zone density considerations; Orlando Executive Airport (close-in, Orlando); Kissimmee Gateway Airport (south border); Apopka (central Florida commercial); (4) St. Johns River Water Management District (SJRWMD) consumptive-use, stormwater, and environmental resource permitting — SJRWMD is the water management district for all of Orange County; (5) Wekiva Protection Area — special protections along the Wekiva River corridor in northern Orange County (shared with Seminole / Lake counties) under the Wekiva Parkway and Protection Act (§ 369.301 Fla. Stat.) imposing stricter stormwater, septic, and environmental standards; (6) Lake Apopka watershed special-protection overlay; and (7) Central Florida Tourism Oversight District (CFTOD, formerly Reedy Creek Improvement District) — the special tax district that governs the Walt Disney World parcels, now under State of Florida oversight rather than Disney; ADU-level single-family zoning within CFTOD is an edge case because the district is primarily tourism / commercial.

• FEMA Special Flood Hazard Areas (SFHA) — National Flood Insurance Program (Orange CRS Class 5) — Orange County administers FEMA NFIP for unincorporated parcels. SFHA extends along the Kissimmee, St. Johns, Wekiva, Little Econ, Econ, and hundreds of lake perimeters. Orange County's CRS Class 5 rating gives NFIP policyholders a 25% premium discount — among the best CRS ratings in Florida. ADU on SFHA parcel requires lowest-floor elevation to BFE + 1 ft freeboard, flood vents, anchoring, and Elevation Certificate.
• Florida Building Code Wind Borne Debris Region (WBDR) — All of Orange County is in the WBDR with 140-mph-ultimate wind-load design (lower than coastal Florida counties). Impact-rated glazing or compliant shutters required on all openings. Orange County's inland position means wind-mitigation cost premium is materially lower than coastal Florida — ADU economics in Orange County are substantially more favorable than in Lee / Manatee / Sarasota for this reason.
• Orlando International Airport (MCO) Airport Influence Area / Airport Land Use Compatibility — MCO is one of the nation's busiest airports. The Airport Influence Area covers substantial unincorporated southern Orange County (Meadow Woods, Hunters Creek eastern fringe, Lake Nona south). ADUs within the AIA face FAA Part 77 obstruction clearance review (typically a non-issue for single-story ADUs) and Part 150 noise-attenuation construction expectations (STC-rated windows, forced-air HVAC with acoustic treatment) in the 65+ dB DNL contour. Executive (close-in), Kissimmee Gateway (south border), and Apopka airports have smaller AIAs affecting specific unincorporated segments.
• St. Johns River Water Management District (SJRWMD) — SJRWMD is the water management district for all of Orange County. Residential consumptive-use permits for private wells operate under the typical exemption below ~6,000 gpd. ADUs adding more than minor footprint may require SJRWMD Environmental Resource Permitting (ERP) under the self-certification Minor System pathway or a standard Individual Permit depending on parcel / lake / wetland proximity. Parcels near Lake Apopka, the Butler Chain, Lake Conway, or the Wekiva system face higher scrutiny.
• Wekiva Protection Area — Wekiva Parkway and Protection Act — The Wekiva Protection Area covers northern Orange County (shared with Seminole and Lake counties), imposing stricter stormwater, septic-system (performance-based enhanced nutrient removal), and environmental-setback standards. ADUs within the protection area face Florida Department of Health performance-based alternative septic system requirements — $15,000-$35,000 septic system cost premium on parcels not served by central sewer. SJRWMD coordinates with FDEP and FDOH on the heightened standards.
• Lake Apopka Watershed Special Protection Overlay — Lake Apopka is Florida's fourth-largest lake and a state-priority restoration target (phosphorus loading from historic muck-farming). Parcels in the Lake Apopka watershed face additional stormwater and nutrient-loading standards for new construction. ADUs on parcels in the watershed should expect additional stormwater design review and possible SJRWMD coordination.
• Central Florida Tourism Oversight District (CFTOD, formerly Reedy Creek) — The Central Florida Tourism Oversight District (formerly Reedy Creek Improvement District) is the special tax district governing Walt Disney World-owned parcels within its boundary. HB 9B (2023) converted the district from Disney-board governance to a State-appointed board. The district is primarily tourism / commercial / resort-residential and not a significant single-family-ADU jurisdiction, but its boundary overlaps a small fraction of unincorporated Orange County. Within CFTOD, ADU permitting on the rare residential parcel goes through the district rather than Orange County.

Orange County Development Services Department is the combined planning / zoning / building / floodplain permit authority for parcels in the unincorporated county. Unincorporated Orange County covers approximately 640 square miles (about 72% of the county's 903 sqmi total land area) and includes very populous unincorporated communities: Pine Hills, Alafaya, Meadow Woods, Hunters Creek, Dr. Phillips, Lake Buena Vista (Walt Disney World area; functionally within Reedy Creek Improvement District / now Central Florida Tourism Oversight District jurisdiction until recently), and large unincorporated segments around the City of Orlando, Lake Nona, and eastern-corridor growth areas. Incorporated municipalities in Orange County include Orlando (largest), Winter Park, Apopka, Ocoee, Winter Garden, Windermere, Maitland, Belle Isle, Edgewood, Eatonville, and Oakland. Orange County is a CRS Class 5 community for NFIP purposes. Orange County is inland — not coastal — but still in the Wind Borne Debris Region (WBDR) with 140-mph-ultimate wind-load design basis (ASCE 7-22), lower than coastal counties. The Development Services Department operates a full one-stop permit center with combined zoning, building, floodplain, stormwater, and fire-rescue review. Hurricane Ian (Sept 2022) delivered substantial inland flooding to the Kissimmee River chain and the St. Johns River segments in eastern Orange County but the storm was largely a coastal Lee-Charlotte-Hardee-Polk event; Orange County's post-Ian permit impact was modest compared to Lee County.