What Does a Garage Conversion ADU in Doral Actually Involve?
A garage conversion ADU in Doral transforms your existing attached or detached garage into a permitted, habitable living space with its own kitchenette, bathroom, sleeping area, and separate entrance. Most conversions we build in Doral run 8 to 14 weeks from permit approval to final inspection, with costs typically falling between $30,000 and $80,000 depending on whether your garage already has power, how much plumbing needs to relocate, and the finish level you want. Call (844) 665-0162 and we’ll walk your specific garage in person, usually within 48 hours.
How We Convert a Garage into an ADU, Start to Finish
Every garage conversion ADU follows a five-stage sequence. We’ve refined this across dozens of South Florida projects, and the order matters because each stage locks in decisions that become expensive to change later.
Stage 1: Feasibility and measured survey (Days 1-5)
We visit your Doral property, measure the garage precisely, photograph existing electrical and plumbing, and check your HOA’s architectural guidelines. You’ll decide right then whether you want a full kitchen or a kitchenette, whether the bathroom needs a tub or just a shower, and whether you’re keeping the garage door opening as a glazed wall or infilling it entirely. That last choice alone swings your structural budget by $3,000-$8,000.
Stage 2: Design and permit drawings (Weeks 2-5)
Our draftsmen produce plans that satisfy Miami-Dade’s HVHZ code, which means impact-rated windows or shutters if any glazing faces the exterior, and wind-load calculations for the roof structure if we’re modifying it. You’ll review fixture locations, electrical outlet counts, and the mini-split HVAC placement. Most Doral HOAs require a 10-14 day architectural review before we can even submit to the county, so we file those simultaneously to compress the calendar.
Stage 3: Demolition and rough construction (Weeks 6-9)
The garage door comes out, the slab gets assessed for moisture intrusion (common in Doral’s high water table), and we frame interior walls, run new electrical service from your panel, and stub in plumbing. If your garage slab sits below the main house’s finished floor, you’ll decide now whether to raise it or step the transition. Raising means breaking concrete, importing fill, and pouring a new cap. It adds $4,000-$7,000 but eliminates the tripping hazard and improves drainage.
Stage 4: Systems and finishes (Weeks 10-12)
Drywall, flooring, cabinetry, countertops, tile, trim, and paint. This is where material choices hit your invoice. A KraftMaid or Wellborn cabinet package runs higher than stock big-box boxes but holds up better in Doral’s humidity. You’ll also finalize your flooring now. LVP (luxury vinyl plank) handles moisture well and installs fast; tile costs more but lasts decades and feels cooler underfoot during South Florida summers.
Stage 5: Inspections and final walkthrough (Weeks 13-14)
Miami-Dade requires rough electrical, rough plumbing, insulation, and final inspections for ADU conversions. We schedule them back-to-back where possible. The final walkthrough is your punch list. We don’t consider a garage conversion ADU complete until you’ve signed off on every detail.
The Spec Choices That Move Your Garage Conversion ADU
These are the real decisions Doral homeowners face, with the honest trade-offs we’ve observed across projects:
- Kitchenette vs. full kitchen: A kitchenette with a mini-fridge, two-burner cooktop, and single-bowl sink runs $3,500-$6,000. A full kitchen with full-size appliances, dishwasher, and 8-10 feet of counter runs $8,000-$18,000. If you’re renting the ADU long-term, the full kitchen commands higher rent. For aging-parent use, the kitchenette usually suffices.
- Bathroom shower vs. tub-shower combo: A 36-inch curbless shower costs $3,500-$5,500 and works for accessibility. A tub-shower combo adds $1,200-$2,500 but limits your tenant pool. In Doral’s market, we’ve seen studios with showers rent faster than those with tubs.
- Garage door infill vs. glazed wall: Infill with CBS block and stucco to match your home costs $4,000-$7,000 and looks original. A glazed wall with impact-rated glass runs $6,500-$12,000 but floods the unit with natural light. HOAs along NW 107th Ave corridor often prefer the infill for visual uniformity.
- Mini-split vs. extending central HVAC: A dedicated mini-split ($2,500-$4,500) gives the ADU its own thermostat and avoids overloading your main system. Tapping central air ($4,000-$8,000) works if your unit has capacity, but many Doral homes built in the 1990s-2000s are already undersized for South Florida heat.
- Standard outlets vs. EV-ready electrical: If the ADU might house a tenant with an electric vehicle, pre-wiring a 240V outlet adds $800-$1,500 during construction. Retrofitting later means cutting finished drywall.
What Garage Conversion ADU Costs in Doral, FL
| Component | Typical Range |
|---|---|
| Basic garage conversion ADU (kitchenette, 3/4 bath, LVP floors, stock finishes) | $30,000 - $48,000 |
| Mid-range conversion (full kitchen, tub-shower, tile floors, semi-custom cabinets) | $48,000 - $65,000 |
| High-end conversion (full kitchen, curbless shower, stone or Cambria counters, raised slab, impact glazing) | $65,000 - $80,000 |
Five variables push you up or down this range. First, garage size. A standard 20×20 two-car bay gives you 400 square feet to work with. A 24×24 oversized garage or one with a side storage bump-out adds livable area but also material and labor costs. Second, existing condition. Garages with active moisture staining, cracked slabs, or outdated electrical panels need remediation before conversion begins. Third, plumbing distance. If your garage sits far from the main sewer line, we may need a sewage ejector pump ($2,000-$4,000) rather than gravity drainage. Fourth, material grade. The jump from stock cabinets to KraftMaid or Wellborn, or from laminate counters to Cambria, is real money but also real durability in Doral’s climate. Fifth, permit scope. A simple conversion with no structural changes moves faster than one requiring roof modifications or load-bearing wall adjustments.
Our written estimates itemize labor, materials, permits, and a contingency line. They do not include appliance packages, window treatments, or furniture. Those are yours to source or add as a change order.
What Doral’s Building Environment Means for Your Conversion
Doral’s almost entirely post-1990 housing stock changes the garage conversion ADU equation in specific ways. Your garage is almost certainly CBS construction on a monolithic slab, which means no rotting wood framing to discover and no foundation surprises. But it also means you’re working within strict HOA architectural standards that govern exterior appearance, roofline continuity, and even paint color matching. We’ve worked with communities along NW 87th Ave and throughout the gated enclaves near Doral Central Park where the HOA review added two weeks but rejected zero proposals because we submitted complete material boards and elevation drawings the first time.
The HVHZ code is the bigger factor. Every exterior window and door must be impact-rated or protected with rated shutters. Your garage door opening, if glazed, needs missile-impact glass. The roof tie-downs must meet 175 mph wind-load standards. This isn’t optional, and it isn’t a place to value-engineer. Out-of-market contractors sometimes quote lower by specifying non-HVHZ materials, then hit change orders when Miami-Dade rejects the permit. We spec to code from day one.
Then there’s water. Doral’s extremely high water table, sometimes just 18 inches below your garage slab, means moisture management isn’t theoretical. We routinely specify vapor barriers under new flooring and recommend raising slabs when the original garage floor sits below the house’s finish grade. During rainy season, which runs June through October, exterior work slows or stops. If you’re targeting a tenant move-in, we push to break ground November through March when Doral’s dry season keeps earthwork and concrete pours on schedule.
Many homeowners doing a garage conversion ADU in Doral are also updating the main house. If you’re considering a full Home Additions & ADU in Doral scope, we coordinate both projects under one timeline. Our Home Additions & ADU crew handles the structural and systems work, and we can bring in Cabinets & Countertops in Doral or Backsplash, Tile & Flooring in Doral as part of the same contract. One contractor, every phase. We cover Doral and nearby Fountainebleau, Miami Springs, Sweetwater, and University Park regularly.
Serving Doral, FL - Our Local Coverage Area
We’re based in the Doral area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
Frequently Asked - Garage Conversion ADU in Doral
From permit approval to final inspection, expect 8 to 14 weeks. HOA review adds 1-2 weeks before permit submission, and Miami-Dade’s HVHZ inspections sometimes require reschedule if the inspector’s backlog is heavy. Call (844) 665-0162 and we’ll check current permit turnaround times.
Yes. Miami-Dade County requires building, electrical, plumbing, and mechanical permits for any garage conversion ADU. The space must meet Florida Building Code residential standards, including minimum ceiling height, natural light requirements, and separate means of egress. We handle permit drawings and submission as part of our service.
Sometimes, but rarely completely. Most Doral garages have adequate electrical for tools and openers, not for a kitchen, bathroom, and mini-split. The existing panel often needs a subpanel or upgrade. Plumbing almost always needs extension, since garage slabs rarely have sewer rough-ins. During our feasibility visit, we map what’s there and what must run new.
Yes, typically by 40-60 percent. You’re using existing walls, roof, and slab rather than building from scratch. A detached ADU in this market runs $90,000-$220,000. The garage conversion ADU leverages structure you already own, though the savings shrink if the garage needs extensive remediation.
We warranty our workmanship for one year on all interior and structural work. Manufacturer warranties apply to materials, for example, KraftMaid and Wellborn cabinet warranties, or James Hardie siding if we infill the garage door with matching exterior. We provide warranty documentation at final walkthrough. For exact coverage on your specific material choices, call (844) 665-0162.
Ready to See What Your Garage Can Become?
Call (844) 665-0162 to schedule a free on-site estimate for your garage conversion ADU in Doral. Raymond Estevez or a senior project manager will walk your garage, check your existing systems, review your HOA requirements, and deliver a written estimate within three business days. No pressure, no generic proposals. Built to spec, not to convenience.
Written by Raymond Estevez, Owner at Groundwork Construction Co., serving Doral since our founding.