Fast, Reliable New Detached ADU Across Orlando
A New Detached ADU in Orlando typically runs $235,000 to $410,000 all-in, drawings through final inspection, depending on whether you’re building on a city lot or acreage under Orange County jurisdiction. The permit path, the foundation detail, and the septic or sewer connection each move that number more than the finishes do. We’re New Detached ADU specialists at Ellery ADU Studio, and we scope every Orlando project against the specific governing documents and soil conditions of your exact parcel before we hand you a written price. Call (971) 497-2402 and we’ll walk the lot with you.
Why Ellery ADU Studio Is Orlando’s Preferred New Detached ADU Company
Nadia Ellery founded this studio in 2015, the year California’s ADU permitting landscape shifted, and we’ve since designed, permitted, and built over 900 ADUs, every one with a written price before work started and a documented photo record when work was complete. Orlando homeowners working with us get that same discipline: a permit set that names every penetration, a scope locked at signing under Haven Standard Clause 5, and a single contract covering design, permitting, and construction. No designer-versus-builder finger-pointing.
We serve Orlando from our metro office, with crews dispatched locally. That matters when a county inspector flags a setback issue on a Lake Nona lot and someone needs to walk the property line that afternoon. Our Orlando clients receive the same 365-Day Done Right Promise in writing before the project starts: if the finished ADU is not built to the permitted drawings, we make it right. Not a verbal assurance. A clause.
Our New Detached ADU Services in Orlando
Custom Built ADU
A custom New Detached ADU on a standard Orlando city lot, typically 600 to 1,000 square feet, runs $275,000 to $410,000 depending on site conditions. On acreage in southeast Orange County, the same square footage can run $260,000 to $390,000, because county rules on septic setbacks and stormwater routing change the foundation and utility scope. We design the unit to your parcel’s actual constraints, not a template.
Prefab ADU Installation
When a prefab system from Cover or Dvele fits the site, we specify it, coordinate delivery, and manage installation under the same single contract. The prefab panelized route often trims 6 to 10 weeks off the schedule for Orlando homeowners, though crane access on tight Lake Nona or Baldwin Park lots can add rigging costs. We quote the panelized system and the site work as one written number.
Modular ADU
Modular units from Boxabl or Mighty Buildings work well on Orlando lots where weather windows are short. Our crew handles the setback verification, the utility trenching, and the final connection. A modular ADU in Orlando typically lands between $210,000 and $340,000 complete, with the variation driven more by foundation and hookup requirements than by the module itself.
Studio ADU
A studio New Detached ADU in Orlando, roughly 400 to 550 square feet, runs $190,000 to $260,000 for a complete build with a full kitchen and bath. On acreage lots, that number can shift upward when we need a thickened-edge slab with perimeter drains to manage the seasonally high water table we see across southeast Orange County. We quote that foundation detail explicitly, not as a surprise change order.
What happens when you call
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A real person answersNo phone trees - you reach a local pro.
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You get an upfront price rangeHonest numbers before anyone is dispatched.
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A background-checked tech heads outLicensed & insured, dispatched right away.
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You approve before work beginsNothing starts until you say go.
Trusted Brands We Service in Orlando
Ellery ADU Studio specifies and coordinates prefab and modular systems from Cover, Dvele, Mighty Buildings, and Boxabl within the same single contract that covers your design, permitting, and site work. That means when you choose a panelized system, you’re not juggling a factory warranty against a builder’s warranty against a designer’s drawings. One contract, one written price, one team accountable. For Orlando homeowners weighing prefab versus stick-built, we walk through the thermal performance numbers for our humidity, the crane access reality on your specific lot, and the permit implications before you sign anything.
Common New Detached ADU Problems We See in Orlando Homes
- HOA demolition orders after final inspection. Florida’s SB 1660 preempts local zoning but not private covenants. A fully permitted ADU in Baldwin Park or Lake Nona can still be ordered demolished if the CC&Rs prohibit detached units. We verify HOA governing documents before pulling any permit.
- Undersized HVAC in concrete block construction. Orlando’s humidity averages above 75% year-round, and a detached CBS unit with a marginal cooling load calculation will hold interior humidity above 60% within the first summer. Mold follows. We size the system for latent load, not just square footage.
- Pool setback conflicts. Many Orlando homes have screened pool enclosures, and the required separation between pool and ADU frequently pushes the unit into a side yard the owner didn’t plan for. We catch this during site assessment, before drawings go to the city or county.
- Foundation choices on high water table lots. Flat topography and seasonally high groundwater across southeast and southwest Orange County restrict standard slab-on-grade. We’ve seen cracked slabs on lake-adjacent lots where the original builder ignored drainage. Our quotes name the slab detail and the stormwater route explicitly.
Pricing for New Detached ADU in Orlando, FL
A New Detached ADU in Orlando averages $235,000 to $410,000 complete. Studio ADUs start around $190,000. One-bedroom units run $220,000 to $300,000. Two-bedroom units run $280,000 to $410,000. What moves the number in Orlando specifically: whether your lot is under city of Orlando jurisdiction or Orange County acreage rules, whether you’re on sewer or septic, whether an HOA review adds conditions, and whether pool setbacks force a foundation redesign. None of these are ambiguous at signing. Haven Standard Clause 1 requires a written price before any work begins, so you’ll know your number before you commit. Call (971) 497-2402 for a free estimate, or bring us any written estimate you already have for a free second opinion.
We Also Serve Cities Near Orlando
We serve New Detached ADU projects across the Greater Orlando area, including Kissimmee, Lakeland, Daytona Beach, and Melbourne. Each has its own permitting quirks, but the same written-price discipline applies. If you’re outside Orlando proper, call (971) 497-2402 and we’ll tell you which jurisdiction governs your parcel.
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 - New Detached ADU in Orlando
If your parcel is on septic and outside Orlando city limits, Orange County issues the permit, and the county’s health department governs septic setbacks, not the city. That setback alone can move your building envelope by 18 feet or more. We flagged exactly that on an acreage lot near Lake Nona, where an old drain field pushed the ADU footprint and we re-scoped the foundation as a thickened-edge slab with perimeter drains before quoting. Call (971) 497-2402 and we’ll identify your governing authority on the first call.
No. SB 1660 stops local governments from banning ADUs, but it does not bind private HOAs. If the CC&Rs in Baldwin Park or Lake Nona prohibit detached units, a fully permitted build can still draw a demolition order from the association. This is not hypothetical. We verify HOA governing documents before we pull any permit, and our written quote includes that review. Get that verification before you spend on drawings.
Orlando’s flat topography and seasonally high water table, especially in lake-adjacent neighborhoods across southeast and southwest Orange County, mean a standard slab-on-grade can fail where Tampa’s sandy soils drain faster. We specify thickened-edge slabs with perimeter drains and vapor barriers sized for Orlando’s humidity. The slab detail changes the foundation line item by roughly $8,000 to $15,000 compared to a drier-soil market. Call (971) 497-2402 for a written scope that names the slab detail on your specific parcel.
Pool enclosures carry their own setback requirements, and in Orlando’s pool-heavy housing stock, the required separation between pool and ADU frequently eliminates the rear-yard placement homeowners assume will work. We’ve seen stop-work orders and redesign fees over $4,000 when a plan ignored this. Our site assessment measures the pool enclosure and the separation before the first drawing is drafted. That’s why our written price covers the survey, not just the structure.
An acreage lot in southeast Orange County typically runs $10,000 to $25,000 more than a same-sized city lot, driven by septic setbacks, well location, longer utility trenching, and equipment access. But the county’s lot-size flexibility often allows a larger unit than a constrained Orlando city parcel would. We quote both scenarios as separate written numbers so you can compare the actual tradeoff. Call (971) 497-2402 for a free estimate that reflects your parcel’s jurisdiction, not a generic average.
Written by Nadia Ellery, Owner at Ellery ADU Studio, serving Orlando with written-price ADU design and construction since 2015.