What Does a Garage Conversion ADU Cost and Involve in Country Walk?
A garage conversion ADU in Country Walk typically runs $30,000-$80,000 and takes 8-14 weeks from permit to final inspection, depending on whether your garage was built pre- or post-Hurricane Andrew. Most homeowners call us at (844) 665-0162 after realizing their existing garage already has the footprint, slab, and roof structure needed for a compact living space - it’s the fastest path to adding rentable square footage without touching your home’s original envelope. The job involves converting vehicle storage into a permitted dwelling unit with kitchenette, full bath, sleeping area, independent HVAC, and separate meter or sub-panel.
We’re based in Fort Lauderdale and work throughout Miami-Dade’s western suburbs, including Country Walk and nearby Kendall West, The Hammocks, and Three Lakes. If you’re weighing this as part of a larger expansion, our Home Additions & ADU in Country Walk page covers detached units, second-story additions, and the full scope of what we build.
How We Convert a Garage to an ADU - Step by Step
Every garage conversion ADU follows a five-stage sequence. Here’s what actually happens, who decides what, and how long each stage takes on a typical Country Walk job.
Stage 1: Feasibility & Measure (Week 1)
We visit your property, pull the existing permit history from Miami-Dade County, and verify whether your garage was original construction or rebuilt after 1992. This matters enormously in Country Walk. Pre-Andrew garages often lack the tie-beam continuity and wall-to-foundation connections that today’s HVHZ code demands for habitable space. We’ll measure your slab thickness, ceiling height, and roof structure, then tell you straight whether conversion pencils out against teardown-and-rebuild. You decide: proceed to design, or pivot to a detached ADU from our Home Additions & ADU portfolio.
Stage 2: Design & Permit Submission (Weeks 2-5)
Our architect drafts plans showing the new kitchenette layout, bathroom wet wall, egress window or door, and HVAC routing. In Country Walk, Miami-Dade inspectors will scrutinize roof-to-wall connections on any pre-1992 garage; we often spec hurricane strap upgrades as a permit condition rather than risk a mid-project correction order. You’ll choose cabinet grade, countertop material, flooring type, and fixture level during this window - decisions that lock your material lead times. Permit review in Miami-Dade currently runs 3-4 weeks for ADU conversions.
Stage 3: Structural Prep & Rough Utilities (Weeks 6-9)
We strip the garage interior, cut the slab for plumbing if your bathroom layout requires it, and frame new interior walls. Electrical upgrade to 100-amp sub-panel or separate meter happens here. On Country Walk’s shallow Miami oolitic limestone, any drainage or sewer lateral work means hitting rock within 12-18 inches - we bring rotary hammers and plan for slower progress than you’d see on sandy Broward soil. Rough inspections for structural, plumbing, electrical, and mechanical all happen before we close walls.
Stage 4: Finish Installation (Weeks 10-12)
Drywall, paint, flooring, cabinets, countertops, fixtures, and appliance hookups. This is where your earlier choices show up. Many Country Walk homeowners pair their garage conversion ADU finish with updates to the main house - we often coordinate Cabinets & Countertops in Country Walk or Backsplash, Tile & Flooring in Country Walk so both spaces share material continuity.
Stage 5: Final Inspection & Certificate of Occupancy (Week 13-14)
Miami-Dade conducts final walk-through for code compliance, fire separation between ADU and main residence, and egress verification. We don’t hand over keys until the C.O. is recorded. Total timeline from our first visit to move-in ready: typically 10-14 weeks, with permit review and material lead times being the biggest variables.
The Spec Choices That Shape Your Garage Conversion ADU
Every decision below affects cost, durability, and who your unit serves best. We don’t default to one spec - you choose, we build to that spec.
- Kitchenette footprint: 4-foot galley vs. 7-foot L-shape. A 4-foot run with a two-burner cooktop and under-counter fridge keeps the budget tight and works for single occupants. The 7-foot L with full-range, dishwasher, and pantry cabinet adds $3,500-$6,000 but rents to couples or serves aging parents who cook regularly.
- Countertop material: laminate, solid surface, or engineered quartz. Laminate runs $400-$800 installed for a small kitchenette and holds up fine with basic care. Solid surface like Corian eliminates seams and costs $1,200-$2,200. For rental durability or if you’re matching a main-house remodel, Silestone or Caesarstone quartz runs $1,800-$3,200 but resists staining and tenant wear better than either alternative.
- Bathroom configuration: wet bath vs. separate shower. A wet bath - shower, toilet, and sink in one waterproofed room with a floor drain - fits in 25 square feet and saves $2,000-$4,000 in framing and tile labor. A separate 32-inch shower stall with glass door needs 40+ square feet and feels more conventional; most long-term renters prefer it.
- Flooring: luxury vinyl plank, porcelain tile, or polished concrete. LVP installs fast over your existing slab, costs $3-$6 per square foot, and handles moisture well in Country Walk’s humid climate. Porcelain at $7-$12 per square foot lasts decades but needs a level slab; many pre-Andrew garages have settled or cracked concrete that requires self-leveling first. Polishing the existing slab runs $2-$4 per square foot and suits industrial-aesthetic rentals, though it transmits sound and stays cool in winter.
- HVAC: mini-split, extended main-house system, or packaged terminal unit. A dedicated mini-split with inverter compressor costs $2,500-$4,500 installed, gives your tenant independent control, and avoids burdening your main AC. Extending ductwork from the house runs $1,500-$3,000 but ties your utility bills together - fine for family use, problematic for rentals. PTAC units through the wall are cheapest at $800-$1,500 but loud and inefficient; we rarely spec them for ADUs anymore.
What Garage Conversion ADU Costs in Country Walk, FL
| Component | Typical Range |
|---|---|
| Basic garage conversion ADU (pre-Andrew garage, minimal structural upgrade, laminate finishes, wet bath) | $30,000-$45,000 |
| Mid-range conversion (post-1992 garage, standard kitchenette, separate shower, LVP flooring, mini-split) | $45,000-$65,000 |
| Full-spec conversion (structural reinforcement, quartz countertops, tile flooring, upgraded electrical service) | $65,000-$80,000 |
Five factors push your number up or down:
1. Garage vintage and structural condition. Pre-Andrew garages in Country Walk often need hurricane strap installation, tie-beam reinforcement, or slab thickening to meet current HVHZ standards for habitable space. This can add $4,000-$12,000 before you touch finishes.
2. Plumbing location. If your existing garage shares a wall with the main house’s kitchen or bath, wet-wall routing is straightforward. Running new sewer and water lines across the slab or through rock-heavy soil to the opposite side of the structure adds $2,500-$6,000.
3. Ceiling height. Code requires 7 feet 6 inches minimum for habitable space. Many 1970s-80s Country Walk garages were framed at 7 feet 8 inches to the underside of joists - workable but tight. Raising the ceiling by dropping the garage door header or reframing the roof adds $3,000-$8,000.
4. Electrical service capacity. A 200-amp main panel with spare capacity handles a sub-panel easily. Older 100-amp services common in original Country Walk builds may need a service upgrade or separate meter installation, running $2,000-$5,500.
5. Finish grade and appliance level. The spread between a basic tenant kitchenette and a Kohler/Moen fixture package with Silestone counters is $5,000-$10,000 alone.
Our written estimates itemize labor, materials, permit fees, and contingency. They do not include appliance purchases (we’ll spec sizes, you buy), window treatments, or landscaping to regrade the former driveway approach.
What Country Walk Homes Specifically Do to This Job
Country Walk’s split-era housing stock makes garage conversion ADU work unlike anywhere else in South Florida. Drive any cul-de-sac in the 33196 ZIP and you’ll pass a 1979 CBS home with original rake-wall framing sitting beside a 1994 rebuild with embedded hurricane straps and 5/8-inch roof sheathing nailed on 6-inch centers. We never assume a garage’s structural history - we verify it.
The post-Andrew rebuilds are generally straightforward conversions: the slab, walls, and roof connections already meet HVHZ standards for habitable load. The surviving pre-Andrew garages are where surprises live. In 2023 we converted a garage on SW 137th Avenue where the original 1981 construction had no mechanical connection between the roof rafters and the top plate - just gravity and stucco. Miami-Dade inspectors flagged it during rough inspection, and we installed Simpson H2.5A straps at every rafter tail as a condition of continuing. The homeowner hadn’t budgeted for it, but it was non-negotiable. We now probe for this on every pre-1992 Country Walk feasibility visit.
The shallow limestone and high water table also shape our approach. Any bathroom that needs a floor drain or sewer ejector pit means rock excavation, not standard trenching. We build that time and equipment into our schedules upfront rather than discover it mid-project. And because Country Walk sits in unincorporated Miami-Dade, we deal directly with county building officials - no city intermediary - which speeds some decisions and complicates others when HVHZ-specific product approvals aren’t in place for a fixture or fastener we might use in Fort Lauderdale without issue.
Serving Country Walk, FL - Our Local Coverage Area
We’re based in the Country Walk 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 Country Walk
Most conversions take 10-14 weeks from our first site visit to certificate of occupancy, with 3-4 weeks of that being Miami-Dade permit review. Pre-Andrew garages needing structural upgrades add 1-3 weeks. Call (844) 665-0162 and we’ll assess your garage’s vintage to give you a firm timeline.
Yes - absolutely, and Miami-Dade enforces this strictly. Any garage conversion ADU requires building, electrical, plumbing, and mechanical permits, plus a final certificate of occupancy before legal occupancy or rental. Unpermitted ADUs in Miami-Dade face fines and must be gutted for inspection. We handle permit submission and inspector coordination as part of our standard process.
Sometimes, but rarely with zero changes. You’ll almost always need electrical upgrade to support kitchenette and HVAC loads, and if your garage lacks a bathroom, plumbing must be routed. The question is how far: sharing a wet wall with the main house keeps costs down; crossing the slab to the opposite wall adds expense. We design to minimize utility relocation whenever your layout allows.
Typically yes - a garage conversion ADU runs $30,000-$80,000 against $90,000-$220,000 for detached ADU construction. You’re leveraging existing slab, walls, and roof. But if your garage needs extensive structural upgrade to meet HVHZ habitable standards, the gap narrows. We compare both paths honestly during feasibility so you don’t over-invest in a marginal existing structure.
We warranty our workmanship for one year from C.O. issuance, covering installation defects in framing, drywall, flooring, and fixture mounting. Manufacturer warranties apply separately to appliances, HVAC equipment, windows, and door hardware - typically 1-10 years depending on brand and product tier. We register all manufacturer warranties in your name and provide documentation at closing. For warranty service questions, call (844) 665-0162 and we’ll dispatch from our Fort Lauderdale office.
Ready to Convert Your Country Walk Garage?
Call (844) 665-0162 to schedule a free on-site feasibility visit. We’ll assess your garage’s build era, measure for code compliance, and deliver an itemized estimate within 48 hours. No obligation, no push - just the specifics you need to decide whether a garage conversion ADU in Country Walk makes sense for your property.
Written by Raymond Estevez, Owner at Groundwork Construction Co., serving Country Walk and South Florida homeowners since 2015.