An ADU builder in Orlando is a licensed contractor who designs and constructs accessory dwelling units — detached backyard units, garage conversions, attached additions, and junior ADUs (JADUs). Because an ADU is a complete second dwelling, the builder coordinates foundation, framing, plumbing, electrical, and HVAC work and pulls it through Orlando's permit process and utility connections. Not every general contractor has built one, so the right builder is one with ADU-specific experience in Florida.
What ADU Builders Cost in Orlando [3][4]
Based on our Orlando cost data, expect the following ranges from local ADU builders. Quotes for the same scope typically vary 20-40% between contractors, so getting at least three bids is the single best way to control cost.
| New Detached ADU (all-in) | $130,000-$260,000 |
| Cost per Sq Ft | $145-$290 |
| Garage Conversion | $60,000-$145,000 |
| Prefab / Modular ADU (installed) | $90,000-$210,000 |
| City Permit & Plan Review | $2,800-$4,500 |
| Impact Fees | $1,100-$1,900 |
For a full line-item breakdown, see our Orlando ADU cost guide. To confirm what you're allowed to build before you hire, review the Orlando ADU rules (max detached size: 1,000 sq ft max, 500 sq ft min; must be smaller than the principal structure (varies by sector); owner-occupancy: Not required by the City of Orlando — Orlando removed owner-occupancy (note: surrounding unincorporated Orange County still requires owner occupancy)).
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How to Vet an ADU Builder in Orlando
- License: Confirm a current contractor's license in Florida and that it's in good standing. Ask for the license number and verify it with the state board.
- ADU-specific experience: Ask how many ADUs they've completed in or near Orlando and request addresses or photos. ADU permitting and setbacks differ from a kitchen remodel.
- Portfolio & references: Get references from recent ADU clients and, if possible, visit a finished unit.
- Insurance: Verify general liability and workers' compensation coverage. Ask for a certificate of insurance.
- Written, detailed bid: Insist on an itemized, fixed-price or clearly-scoped bid — not a verbal estimate. It should state whether permits ($2,800-$4,500), plan check (2-3 weeks), and impact fees ($1,100-$1,900) are included.
- Permit handling: Confirm they manage Orlando's permit process ("Building permit + flood review", typically 60-85 days) and who is responsible if revisions are required.
- Payment schedule: Avoid large upfront payments. A reasonable schedule ties payments to completed milestones.
Questions to Ask Before You Hire
- How many ADUs have you built in Orlando in the last two years?
- Is your bid fixed-price, and what would trigger a change order?
- Are permits, plan check, and utility connection fees included?
- What's a realistic timeline, including permit review (60-85 days) and construction?
- Who is my point of contact and how are delays communicated?
- What warranty do you provide on workmanship?
- Can you share three recent Florida ADU client references?
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