How Much Does a Garage Conversion ADU Cost in Gladeview?
A garage conversion ADU in Gladeview typically runs $30,000-$80,000 and takes 8-14 weeks from permit to final inspection. Most projects involve converting an existing attached or detached garage into a permitted living space with kitchenette, full bath, sleeping area, and independent HVAC. For a detailed walkthrough of your specific garage and a written estimate, call Groundwork Construction Co. at (844) 665-0162.
How We Convert a Garage to an ADU - Start to Finish
We’ve done enough of these in unincorporated Miami-Dade to know where the delays hide. Here’s the actual sequence we follow for a garage conversion ADU in Gladeview, with what you’ll need to decide at each point.
Stage 1: Feasibility and zoning check (Week 1)
We pull your property’s Miami-Dade County records and verify setbacks, lot coverage, and whether your garage is legally permitted as a garage to begin with. Some 1950s Gladeview homes have unpermitted additions or garages built too close to the property line. If the structure isn’t on the county’s books, we address that before design starts. You’ll decide: do we pursue a variance if needed, or adjust the footprint to stay within existing boundaries?
Stage 2: Design and engineering (Weeks 2-4)
We measure the existing slab, roof structure, and wall framing, then produce plans that show the new kitchenette layout, bathroom location, and any window or door modifications. Because Gladeview falls under High-Velocity Hurricane Zone requirements, every new or modified opening needs an impact-rated product with a valid Miami-Dade NOA. You’ll choose your window and door specs here - we pull options from Andersen, PGT, and CGI’s NOA-approved lines so there’s no surprise rejection at inspection.
Stage 3: Permit submission and review (Weeks 5-8)
Plans go to Miami-Dade County’s centralized building department, not a city office, since Gladeview is unincorporated. Review times vary; we typically see 3-4 weeks for residential additions, but HVHZ structural details can trigger additional engineering scrutiny. We handle all resubmittals. Your only task: approve any plan revisions quickly so we don’t lose our place in queue.
Stage 4: Construction (Weeks 9-18, depending on scope)
Demo of the garage interior, slab assessment, and any needed reinforcement come first. Many Gladeview garages sit on thin slabs with no moisture barrier - we test for vapor transmission and install a proper subfloor system if readings are high. Framing, MEP rough-in, insulation, drywall, and finishes follow. If we’re relocating plumbing from the main house or adding a separate electrical meter, that work happens here. You’ll make your final material selections during pre-construction: flooring, cabinetry, countertops, fixtures.
Stage 5: Inspections and closeout (Weeks 19-20)
Miami-Dade County schedules all inspections - rough electrical, plumbing, mechanical, framing, insulation, and final. Because Gladeview contractors must use the county’s centralized system, we coordinate directly and make sure every product on site matches its NOA documentation. Failed inspections for paperwork mismatches are common with crews unfamiliar with this process. We don’t let that happen.
The Options You’ll Choose Between for Your Garage Conversion ADU
- Stick-built interior vs. prefab modular components: Traditional stick framing gives maximum flexibility for odd garage dimensions, which are common in older Gladeview homes. Prefab bathroom pods or kitchenette modules speed installation but require precise rough-in dimensions. We offer both paths - stick-built for custom fits, modular for faster schedule.
- KraftMaid or Wellborn cabinetry: Both carry solid warranties and multiple price tiers. KraftMaid’s frameless construction maximizes storage in tight garage footprints. Wellborn’s framed styles handle humidity better if your garage slab shows any moisture history. We’ll show you samples and explain which construction type suits your space.
- Cambria quartz or tile countertops: Cambria offers consistent color and zero maintenance - worth the premium if you’re renting the ADU and want durability. Tile costs less upfront but needs periodic grout maintenance. For rental units in Gladeview’s climate, we generally steer clients toward quartz.
- Extend existing HVAC or install mini-split: Tapping the main house’s system is cheaper if capacity allows, but creates a shared utility bill. A dedicated mini-split gives the ADU independent climate control and simplifies rental arrangements. Most garage conversions we do in Gladeview go mini-split for this reason.
- Separate meter or sub-metered electrical: Miami-Dade allows either, but a separate meter requires FPL coordination and extends timeline by 2-3 weeks. Sub-metering is faster to install but less clean for landlord-tenant accounting. We explain the trade-offs during design.
What Garage Conversion ADU Costs in Gladeview, FL
| Cost Component | Typical Range |
|---|---|
| Basic garage conversion ADU (400-500 sq ft, existing slab, no plumbing relocation) | $30,000-$50,000 |
| Mid-range conversion (500-600 sq ft, kitchenette, full bath, mini-split, impact windows) | $50,000-$65,000 |
| Full conversion with structural upgrades (600+ sq ft, slab reinforcement, separate utilities, premium finishes) | $65,000-$80,000 |
Five factors push your number up or down:
1. Existing garage condition: Spalling concrete, corroded rebar, or a slab poured without vapor barrier adds $3,000-$8,000 for remediation. We see this in roughly half the Gladeview garages built before 1970.
2. Plumbing and electrical distance: If your main drain and electrical panel sit on the opposite side of the house, extending service adds $2,500-$6,000 versus a garage adjacent to existing utilities.
3. Window and door count: Each new impact-rated opening in HVHZ territory runs $800-$2,500 installed, depending on size and brand. Converting a garage door to a proper wall with windows is often the single biggest line item after MEP.
4. Ceiling height and roof structure: Garages with low flat roofs may need truss modification or a small roof raise to meet minimum ceiling height for habitable space. That structural work ranges $4,000-$12,000.
5. Finish grade: Luxury vinyl plank and standard fixtures keep you at the lower end. Tile flooring, quartz counters, and upgraded cabinetry move you toward the top.
Our written estimates include all labor, materials, permits, and inspections. What they don’t include: FPL service upgrade fees, separate water meter installation, or HOA architectural review fees if your Gladeview property has a private association.
What Gladeview Homes Specifically Do to This Job
Gladeview’s housing stock changes the math on every garage conversion ADU we bid here. The neighborhood’s 1950s-60s concrete block homes were built before Miami-Dade’s High-Velocity Hurricane Zone rules existed, and county inspectors enforce those standards strictly on any permitted alteration.
We’ve opened garage walls in Gladeview to find no hurricane strapping between roof and wall, original jalousie windows with zero impact rating, and cast-iron drain lines that crumble when disturbed. The county’s centralized inspection system - mandatory because Gladeview has no municipal building department - means every product we spec must carry a current Miami-Dade NOA, verified through the county’s online portal before we ever order it. Out-of-area contractors routinely skip this step and end up swapping windows or roofing membrane mid-job after a failed inspection.
The flat, low-lying terrain around Gladeview also means summer water tables sit close to slab level. We’ve measured vapor transmission rates in garage slabs here that would destroy standard flooring within two years. Our standard practice: test every Gladeview garage slab for moisture before finalizing material specs, and build in a proper subfloor system when readings exceed manufacturer thresholds. It’s not optional if you want the ADU to last.
Homeowners often pair a garage conversion with interior upgrades to the main house. If you’re planning a full Home Additions & ADU in Gladeview project, we coordinate both scopes under one timeline. Many clients also add Cabinets & Countertops in Gladeview to the main kitchen while we build out the ADU kitchenette, or refresh flooring throughout with our Backsplash, Tile & Flooring in Gladeview crew. As a Home Additions & ADU contractor serving all of unincorporated Miami-Dade, we handle the full scope - from driveway to roofline - without handing you off to separate trades.
Our Gladeview projects draw on the same material rigor we apply across South Florida: James Hardie siding where exterior walls get modified, impact-rated windows from Andersen or PGT, and cabinetry from KraftMaid or Wellborn’s moisture-resistant lines. You choose the brand, we handle the build.
Serving Gladeview, FL - Our Local Coverage Area
We’re based in the Gladeview 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 Gladeview
Most garage conversion ADU projects in Gladeview take 8-14 weeks from permit approval to final county inspection, with permit review adding another 3-4 weeks before construction starts. HVHZ engineering details and Miami-Dade’s centralized inspection scheduling are the main variables we can’t control. Call (844) 665-0162 and we’ll review your specific garage and give you a realistic timeline based on current county processing times.
Yes - every garage conversion ADU in Gladeview requires a Miami-Dade County building permit because the neighborhood is unincorporated and has no city building department. The permit covers structural, electrical, plumbing, and mechanical work, and every material must carry a Miami-Dade NOA approval. We handle the entire permit process and all county inspections as part of our standard project management.
You can if your garage already sits near existing utilities and your slab condition allows a simple layout, but most Gladeview garage conversion ADU projects need at least electrical extension and often a new drain line for the bathroom and kitchenette. During our initial site visit, we map your existing systems and show you exactly what relocation - if any - your specific garage requires.
The lowest-cost path keeps the existing slab, avoids plumbing relocation, uses a mini-split instead of extending central HVAC, and selects standard finishes like luxury vinyl plank and laminate countertops. Even at the budget end, we don’t skip HVHZ-required impact windows or proper moisture barriers - those aren’t places to cut corners in Miami-Dade County. For an exact quote on your garage, call (844) 665-0162 for a free estimate.
We warranty our workmanship on every garage conversion ADU, and the materials we install carry their own manufacturer warranties - KraftMaid and Wellborn cabinetry, Andersen and PGT windows, and Cambria countertops each back their products with documented coverage. We provide all warranty paperwork at project closeout and explain what’s covered by us versus the manufacturer.
Get Your Free Estimate for a Garage Conversion ADU in Gladeview
Call (844) 665-0162 to schedule a free on-site evaluation of your garage. We’ll assess slab condition, existing utilities, and HVHZ compliance requirements, then deliver a written estimate with real numbers and a clear construction timeline. Raymond Estevez and our team at Groundwork Construction Co. have handled garage conversion ADU projects across unincorporated Miami-Dade - we know what the county inspectors look for and we build to pass the first time.
Written by Raymond Estevez, Owner at Groundwork Construction Co., serving Gladeview and South Florida.