Orlando's housing market is driving strong demand for accessory dwelling units as homeowners seek rental income, multigenerational housing solutions, and ways to add value to their properties. Orange County and the City of Orlando both allow ADUs on qualifying residential lots, and both require sealed structural drawings for permit applications. Pineland Engineering provides complete structural engineering and permit sets for ADU projects throughout the Orlando metropolitan area.
Quick Answer
Pineland Engineering (AR102594 · PE 39202) provides ADU structural engineering in Orlando, FL. We prepare permit-ready structural plans for guest houses, in-law suites, and garage apartments for Orange County and City of Orlando permits. Call (239) 420-1530.
Orlando ADU Permit Requirements
Orlando ADU permits are processed through either the City of Orlando Building Division (for properties within city limits) or Orange County Building Division (for unincorporated Orange County).
Both require sealed structural drawings for ADUs over 200 square feet. The design wind speed for Orlando is 120 mph, lower than coastal Florida but still requiring proper wind-resistant design. Orlando properties are generally not in coastal flood zones, but some areas near lakes and rivers may have FEMA flood zone designations. Pineland Engineering prepares permit sets formatted for the applicable jurisdiction.
ADU Types in Orlando
Orlando homeowners build a variety of ADU types: detached guest houses in the backyard, garage conversions (converting the existing garage to living space), above-garage apartments, attached in-law suites, and tiny homes on permanent foundations.
Each type has different structural requirements. Garage conversions require structural assessment of the existing slab and walls. Above-garage apartments require a new elevated floor framing system. Detached guest houses require a complete new structural system from foundation to roof. Pineland Engineering designs all of these types for Orlando's specific code requirements.
Florida Building Code for Orlando ADUs
All Orlando ADUs must comply with the Florida Building Code 8th Edition (2023), which applies statewide.
The structural design must address wind loads (120 mph for Orlando), gravity loads (dead, live, and roof loads), and foundation design appropriate for Central Florida's soil conditions. Many Central Florida soils are sandy with varying bearing capacities, and some areas have a history of sinkhole activity, which may require geotechnical investigation before foundation design. Pineland Engineering addresses all of these considerations in our Orlando ADU structural designs.
Statewide Service from Southwest Florida
Pineland Engineering is based in Lee County but provides structural engineering services statewide, including Orlando and the greater Central Florida area.
We work remotely with Orlando homeowners, architects, and contractors, providing complete permit sets that meet local jurisdiction requirements. Our engineers are licensed in Florida (PE 39202, AR102594) and familiar with Orange County and City of Orlando review standards. Call (239) 420-1530 to discuss your Orlando ADU project.
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Frequently Asked Questions
Does Orlando allow ADUs?
Yes. Both the City of Orlando and Orange County allow ADUs on qualifying single-family residential lots. Zoning requirements vary by district — confirm eligibility with the applicable planning department before starting design.
Do I need a structural engineer for an ADU in Orlando?
Yes. Both City of Orlando and Orange County require sealed structural drawings from a licensed Florida PE for ADUs over 200 sq ft. Pineland Engineering (PE 39202) provides statewide ADU structural engineering services.
Are there sinkhole concerns for ADU foundations in Orlando?
Some Central Florida areas have documented sinkhole activity. If your property is in a sinkhole-prone area, a geotechnical investigation may be needed before foundation design. Pineland Engineering can advise on whether geotechnical data is needed for your specific site.
How does Pineland Engineering work with Orlando clients remotely?
We work with Orlando clients via email, phone, and video calls. We review site plans, surveys, and existing drawings remotely and deliver complete permit-ready structural drawings electronically. Our Florida PE seal is valid statewide.
Florida-Licensed · AR102594 · PE 39202 · Bilingual EN/ES
Ready to Start Your Project?
Pineland Engineering — Designda Inc. — serves residential and commercial clients statewide. FL Architecture AR102594 · Engineering PE 39202. PO Box 417, Pineland, FL 33945.