ADU in Orlando, FL
An ADU in Orlando typically costs $95,000-$340,000 all-in, drawings through final inspection, depending on whether you convert an existing garage or build a new detached unit. Most Orlando homeowners start with the permit question, because the city’s 1960s-1990s concrete block ranch homes on slab foundations create specific design constraints that don’t show up in newer markets. Our design-build team handles all five ADU categories under one contract at one written price, so the drawings, the permit set, and the construction are never split between separate companies. Call (971) 497-2402 to start with a written scope and price.
Why Orlando Homes Are Different
Orlando’s residential core is dominated by concrete block and stucco ranch homes built between the 1960s and 1990s, most of them on slab foundations with detached garages or carports and screened pool enclosures. That housing stock is actually a good ADU candidate in many cases, because the slabs are often thick enough to support a conversion and the lots are large enough to keep setbacks workable. But the pool homes add a real permitting wrinkle: pool setbacks frequently conflict with where you’d naturally place a new detached ADU in the rear yard, and Orange County’s review process treats those encroachments seriously. On top of that, Orlando’s near-daily summer thunderstorms and humidity averaging above 75% relative humidity mean vapor management and aggressive HVAC sizing are non-negotiable in any detached unit. In lake-adjacent neighborhoods across southeast and southwest Orange County, the flat topography and seasonally high water table restrict foundation options and require careful stormwater routing for new structures. And in corridors like Baldwin Park, Lake Nona, Dr. Phillips, and Celebration, HOA-governed master-planned communities often prohibit ADUs outright through CC&Rs that Florida’s 2023 preemption law does not override. We verify HOA governing documents before pulling any permit, because a fully permitted build that the association forces you to demolish is a documented risk in this market, not a hypothetical one.
Our Main Orlando Services
Two ADU paths account for most of what Orlando homeowners call us about: converting an existing garage into a rentable or multigenerational unit, and building a fully detached ADU from scratch in the rear yard. Each has its own page here.
Garage Conversion ADU in Orlando
A garage conversion in Orlando turns an existing 1960s-1990s attached or detached garage into a self-contained unit with its own kitchen, bath, and entrance. These jobs are faster than new builds because the foundation, roof, and three walls often already exist, though Orlando’s block-wall construction means every wall penetration needs careful vapor detailing for our humidity. Florida’s HOA restrictions are just as binding here as on new detached ADUs, so we verify governing documents before any permit application. Read the full scoping and pricing detail on our Garage Conversion ADU in Orlando page.
New Detached ADU in Orlando
A new detached ADU in Orlando is a ground-up rear-yard unit on a new slab or pier foundation, designed to fit within Orange County’s setback and stormwater requirements. On Orlando’s flat, lake-adjacent lots with high seasonal water tables, foundation design is the first decision that shapes the whole budget, and it’s where we spend the most upfront engineering time. Detached units also need their own electrical service sizing and HVAC, which in Orlando’s humidity has to be spec’d aggressively from day one. See the full breakdown on our New Detached ADU in Orlando page.
What happens when you call
- 1
A real person answersNo phone trees - you reach a local pro.
- 2
You get an upfront price rangeHonest numbers before anyone is dispatched.
- 3
A background-checked tech heads outLicensed & insured, dispatched right away.
- 4
You approve before work beginsNothing starts until you say go.
ADU Design & Permitting in Orlando
ADU design and permitting in Orlando means producing a permit set that Orange County or the City of Orlando will actually approve, for a home that will actually hold up in Florida’s humidity, pool setbacks, and HOA restrictions. Most Orlando ADU projects derail at the permit counter because the drawings don’t account for the block-wall vapor details, the pool setback encroachment, or the HOA’s CC&R prohibition that no local law overrides. Our ADU Design & Permitting team treats the permit set as the core product: every sheet is drawn for the specific lot, the specific slab, and the specific governing documents, and the construction is priced from those same sheets under one contract.
Site Assessment
Signs you need it
You have a pool, a lake-adjacent lot, an HOA, or any uncertainty about whether your rear yard can fit a legal ADU under Orange County setbacks.
What it costs in Orlando
Site assessment in Orlando typically runs $450-$1,200 depending on lot complexity and whether HOA document review is included.
How we do it
We measure the existing slab, map pool setbacks and easements, review the HOA governing documents, and confirm stormwater routing feasibility before any design work begins.
ADU Design & Blueprints
Signs you need it
You know the ADU will fit but need a permit-ready drawing set that addresses Florida HVAC, vapor, and structural requirements specifically.
What it costs in Orlando
ADU design and blueprints in Orlando typically run $6,000-$18,000 depending on unit size and whether it’s a conversion or new detached build.
How we do it
We produce full architectural and structural sheets, mechanical sizing for Orlando’s humidity, and a door-and-window schedule tied to the energy compliance path.
Permit Application
Signs you need it
Your drawings are complete but you want a clean submission package that won’t bounce back on Orlando’s specific review comments.
What it costs in Orlando
Permit application and management in Orlando typically runs $2,500-$6,500 in municipal and plan-review fees, depending on jurisdiction.
How we do it
We file the complete package, track the review cycles, respond to corrections in writing, and document every approval for your project record.
What ADU Design & Permitting Costs in Orlando
| Item | Typical range in Orlando |
|---|---|
| Site assessment | $450-$1,200 |
| ADU design & blueprints | $6,000-$18,000 |
| Permit application & management | $2,500-$6,500 |
How long does ADU permitting take in Orlando?
Plan check in the City of Orlando and Orange County typically runs 4-10 weeks for a complete ADU permit set, depending on review workload and whether a variance is required for pool setbacks or HOA-related conditions. A clean submittal with all sheets and energy compliance documentation attached shortens that window measurably. Call (971) 497-2402 for a written timeline tied to your specific lot.
Will an HOA stop my ADU permit in Orlando?
Yes, if the CC&Rs prohibit ADUs. Florida’s 2023 preemption law binds local governments, not private HOAs, so a master-planned community in Lake Nona or Baldwin Park can still refuse an ADU even when the city would approve it. We verify governing documents before any permit application. Call (971) 497-2402 to start that review.
Junior ADU & Interior Conversion in Orlando
A junior ADU or interior conversion in Orlando converts existing interior square footage, a basement-level space, or an attached area into a smaller self-contained unit, usually 150-500 square feet, with its own entrance, kitchenette, and bath. These jobs are heavily constrained by Orlando’s block-wall construction and humid climate, because every new wall penetration in an existing structure is a vapor risk that has to be detailed correctly. Our Junior ADU & Interior Conversion work is priced from the same permit set and executed under the same single contract as our larger ADUs.
Room-to-ADU Conversion
Signs you need it
You have an oversized bedroom, den, or bonus room with an exterior wall where a private entrance can be added without moving load-bearing block walls.
What it costs in Orlando
Room-to-ADU conversions in Orlando typically run $55,000-$110,000 all-in, including the new entrance, bath, kitchenette, and mechanical work.
How we do it
We add the exterior door, build the interior partition walls, run new plumbing and electrical for the kitchenette and bath, and size the mini-split HVAC for Orlando’s humidity.
Attached Addition ADU
Signs you need it
Your existing home has an attached garage, covered patio, or underused wing with a slab that can support a conversion to a legal ADU.
What it costs in Orlando
Attached addition ADUs in Orlando typically run $75,000-$150,000 depending on the existing structure’s condition and the extent of new plumbing and electrical work.
How we do it
We verify the slab depth, add the private entrance and fire-rated separation wall, and run new mechanical and plumbing lines through the existing block structure with proper vapor sealing.
What Junior ADU & Interior Conversion Costs in Orlando
| Item | Typical range in Orlando |
|---|---|
| Room-to-ADU conversion | $55,000-$110,000 |
| Attached addition ADU | $75,000-$150,000 |
| Interior JADU (kitchenette + bath within existing rooms) | $45,000-$90,000 |
Can I add a JADU to a 1960s block ranch in Orlando?
Yes, in most cases. The biggest constraints are the existing slab thickness, the placement of the private entrance on an exterior block wall, and the humidity detailing around any new wall penetrations. A site assessment confirms feasibility before design starts. Call (971) 497-2402 for that assessment.
Does an interior conversion in Orlando need its own electrical panel?
Not always, but many 1960s-1990s Orlando homes are already near capacity on their existing panels, which means a subpanel upgrade is often part of the scope. We verify load calculations during the site assessment so the panel decision is priced upfront, not discovered mid-project. Call (971) 497-2402 for a written scope.
ADU Site Prep & Utilities in Orlando
ADU site prep and utilities in Orlando covers the below-grade and infrastructure work that has to be right before any framing starts: foundation, stormwater routing, electrical service, plumbing laterals, and gas. On Orlando’s flat, lake-adjacent lots with high seasonal water tables, the foundation and drainage decisions shape the entire budget, and getting them wrong is the most expensive mistake in an ADU project. Our ADU Site Prep & Utilities team prices every below-grade item from the same permit set, so there are no change orders when the excavator hits a condition the drawings already accounted for.
Foundation & Grading
Signs you need it
You’re building a new detached ADU and the rear yard has standing water after summer storms, lake-adjacent soils, or any elevation change across the pad area.
What it costs in Orlando
Foundation and grading for a new detached ADU in Orlando typically runs $8,000-$22,000 depending on soil conditions and whether pier or slab construction is required.
How we do it
We test the soil, design the foundation for the seasonal water table, grade the pad for positive drainage, and route stormwater away from the new structure per Orange County requirements.
Electrical Panel Upgrade
Signs you need it
Your existing 100-amp panel is already full, or the new ADU’s HVAC load plus existing home loads push the service calculation over capacity.
What it costs in Orlando
Electrical panel upgrades for an ADU in Orlando typically run $1,500-$3,500 for the panel swap and local disconnect, not including utility coordination if a service upgrade is required.
How we do it
We complete a load calculation from the permit set, upgrade the panel or add a subpanel, and coordinate with the utility so the new service is ready before the ADU’s HVAC is connected.
Plumbing Lateral
Signs you need it
Your new ADU needs its own sewer or septic lateral, or the existing lateral is cast iron and too corroded to serve the new unit reliably.
What it costs in Orlando
Plumbing lateral installation in Orlando typically runs $3,000-$8,000 depending on the distance from the new unit to the existing sewer connection and the trench depth required.
How we do it
We run the new lateral, install a cleanout at the property line, and coordinate the tie-in inspection with Orange County before backfilling.
What ADU Site Prep & Utilities Costs in Orlando
| Item | Typical range in Orlando |
|---|---|
| Foundation & grading | $8,000-$22,000 |
| Electrical panel upgrade | $1,500-$3,500 |
| Plumbing lateral | $3,000-$8,000 |
Does every new detached ADU in Orlando need a full foundation?
Most do, because Orlando’s flat lots and seasonal water table make a properly engineered slab or pier foundation the difference between a unit that stays dry and one that doesn’t. The specific design depends on your soil report and lot elevation. Call (971) 497-2402 for a written foundation scope.
Can I run my ADU off my existing electrical panel in Orlando?
Sometimes, but many 1960s-1990s Orlando homes are already running at capacity, especially when the ADU adds a full HVAC system for the humidity. We run the load calculation from the permit set and tell you the exact panel scope before any work starts. Call (971) 497-2402 for that calculation.
Brands We Service in Orlando
We specify and coordinate prefab and modular ADU systems from Cover, Dvele, and Mighty Buildings within the same single contract as the site work, foundation, and utilities. Parts and panel kits are ordered to our Orlando project sites with standard manufacturer lead times, and our crews handle the full installation and finish work. See our brands for the full system detail.
Pricing for ADU in Orlando, FL
| Service | Typical range in Orlando |
|---|---|
| Site assessment | $450-$1,200 |
| ADU design & blueprints | $6,000-$18,000 |
| Permit application & management | $2,500-$6,500 |
| Room-to-ADU conversion | $55,000-$110,000 |
| Attached addition ADU | $75,000-$150,000 |
| Interior JADU | $45,000-$90,000 |
| Foundation & grading | $8,000-$22,000 |
| Electrical panel upgrade | $1,500-$3,500 |
| Plumbing lateral | $3,000-$8,000 |
What pushes the price up in Orlando is usually the HOA document fight, a pool setback variance, or a lake-adjacent lot with a high water table that demands a more expensive foundation design. What pushes it down is a clean site assessment and a permit set drawn for your specific lot the first time. Every one of our Orlando projects gets a written price before any work starts, under Haven Standard Clause 1, and that price does not move unless the scope changes in writing.
Neighborhoods We Serve in Orlando
We work across Orlando’s residential core, from the master-planned communities of Baldwin Park, Lake Nona, Dr. Phillips, and Celebration to the older block-ranch neighborhoods of College Park, Conway, and Audubon Park. Scheduling is coordinated from our Orlando office and dispatch is local, which means crew travel is measured in minutes, not hours, for most of the metro.
- Baldwin Park
- Lake Nona
- Dr. Phillips
- College Park
- Conway
Service Area - Cities Near Orlando
Our Orlando crews also serve the surrounding metro. If you’re in Kissimmee, FL or Lakeland, FL, the same written-price, single-contract model applies. Homeowners in Daytona Beach, FL and Melbourne, FL also fall within our service radius, and the permitting and climate conditions in those markets are handled by the same design-build team.
Serving Orlando, FL - Our Local Coverage Area
We’re based in the Orlando area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
FAQs About ADU in Orlando
Once we complete the site assessment and HOA document review, design typically begins within two weeks. The full timeline depends on permit review workload at the City of Orlando or Orange County, but a written schedule is part of every proposal. Call (971) 497-2402 to get your lot on the schedule.
Yes. We pull and read the governing documents before any permit application, and we document every restriction in writing so you know exactly what your association allows before you spend money on drawings. If the CC&Rs prohibit ADUs, we tell you in the site assessment, not after the build. Call (971) 497-2402 for that review.
Correct. Ellery ADU Studio is a design-build studio, not a contractor that subcontracts the design. The drawings, the permit set, and the construction are one contract at one written price, which eliminates the designer-versus-builder blame gap that derails most ADU projects. Call (971) 497-2402 for a written price before any work begins.
Call Ellery ADU Studio at (971) 497-2402 for a free estimate on your Orlando ADU. Every project gets a written price before work starts, a documented photo record on every visit, and the 365-Day Done Right Promise in writing.
What happens when you call
- 1A real person answersNo phone trees - talk to a local adu pro.
- 2You get an upfront price rangeHonest numbers before anyone is dispatched. No surprises.
- 3We come out and measureLicensed & insured, at a time that suits you - the visit and the quote are both free.
- 4You get the price in writingLine-itemed, yours to keep, and nothing starts until you say go.
What Orlando Customers Say
"The rental income has covered the payment since the second month. They were realistic about the numbers rather than optimistic."
- Odette N."They walked us through setbacks and utility capacity before we paid anything, and told us one of our two options was not going to get approved."
- Mireille T."Every allowance was itemised at the start, so the finish selections did not turn into a surprise at the end."
- Benedict H.