Garage Conversion ADU in University Park: What It Costs and How Long It Takes
A garage conversion ADU in University Park, FL transforms an existing attached or detached garage into a permitted dwelling unit with its own kitchen, bath, sleeping area, and separate entrance. Most projects we handle here run 10 to 16 weeks from permit approval to final inspection, with costs typically falling between $30,000 and $80,000 depending on whether the structure needs plumbing relocation, electrical service upgrades, or foundation work. Call (844) 665-0162 and we’ll walk through your specific garage on a free site visit.
How We Convert a Garage into an ADU, Start to Finish
Every garage conversion Home Additions & ADU in University Park follows five distinct stages. Knowing the sequence helps you plan around the work and make decisions before they become urgent.
Stage 1: Site Evaluation and Feasibility (1-2 weeks)
We measure the existing slab, roof structure, and electrical panel capacity. You’ll decide whether the unit needs a full kitchen or a kitchenette, whether the bathroom will use a shower or tub-shower combo, and whether you want a separate meter or to stay on the main house service. This is also when we pull the property survey and check Miami-Dade zoning for setback and parking replacement requirements.
Stage 2: Design, Permitting, and Material Submittals (4-8 weeks)
Our drafting team produces plans for Miami-Dade Building Department review. Every product we specify - windows, doors, roofing fasteners, impact-rated glazing if required - must carry a Miami-Dade Notice of Acceptance (NOA). We submit these NOA documents with the permit application. Homeowners choose flooring type, cabinet line, countertop material, and fixture package during this window. Delays here almost always trace back to incomplete product approvals, which is why we vet every item before submission.
Stage 3: Demolition and Rough Construction (2-3 weeks)
We strip the garage interior, modify or replace the overhead door with a framed wall and entry system, and rough in plumbing, electrical, and HVAC. If the existing slab lacks the perimeter footer required for a dwelling unit, we cut and pour a stem wall or grade beam. In University Park’s western areas near the Everglades drainage, we sometimes hit high water tables during the rainy season; when that happens, we switch to sealed forms and rapid-set concrete to beat intrusion.
Stage 4: Insulation, Drywall, and Finish Installation (3-5 weeks)
We install insulation to Miami-Dade energy code, hang and finish drywall, then run flooring, cabinets, countertops, tile, and fixtures. This is when material choices show up in the daily progress. A homeowner who chose Cambria quartz for the kitchenette sees it templated and installed here. Same for KraftMaid or Wellborn cabinet runs, or the James Hardie siding we use to match the existing home’s exterior when the old garage door opening gets infilled.
Stage 5: Inspections and Final Walkthrough (1-2 weeks)
Miami-Dade inspectors visit for rough trades, insulation, and final occupancy. We schedule these in sequence so one failed item doesn’t cascade. Once the certificate of occupancy issues, we do a final walkthrough with you, document any punch-list items, and close them within 48 hours.
The Options You’ll Choose Between on a Garage Conversion ADU
Every decision below moves the budget and the living experience in a different direction. We lay out the trade-offs so you’re not guessing.
- Kitchenette vs. full kitchen: A kitchenette with a two-burner cooktop, compact fridge, and single-bowl sink runs $4,000-$8,000. A full kitchen with full-size appliances, dishwasher, and 8-10 feet of cabinetry hits $12,000-$22,000. For a rental unit, the full kitchen commands higher rent; for in-law use, the kitchenette often suffices.
- Bathroom configuration: A 36-inch shower stall with a wall-hung vanity is the efficient choice at $5,000-$9,000. Adding a tub-shower combo or expanding to a 5-foot walk-in shower with a double vanity pushes to $10,000-$16,000. The slab’s existing drain location matters; moving it across the garage floor adds $2,000-$4,000.
- Flooring material: Luxury vinyl plank (LVP) at $3-$6 per square foot installed handles moisture well and installs fast. Porcelain tile at $6-$12 per square foot lasts longer but adds a week to the schedule for mortar cure time. We don’t recommend engineered hardwood in ground-level University Park conversions; the humidity swings and potential slab moisture are hard on it.
- HVAC approach: A ductless mini-split ($3,500-$6,500 installed) is the default for garage conversion ADUs. Extending the main house central system is sometimes possible but often requires a larger unit and new duct runs that cost more than the mini-split while creating shared utility headaches.
- Separate meter vs. submeter: A full electrical service with its own meter adds $4,000-$8,000 and requires FPL coordination. A submeter or simple load calculation on the existing panel saves money but means the tenant pays the homeowner, not the utility directly.
What Garage Conversion ADU Costs in University Park, FL
| Cost Component | Low Range | High Range |
|---|---|---|
| Basic garage conversion ADU (kitchenette, shower bath, LVP, mini-split) | $30,000 | $45,000 |
| Mid-range conversion (full kitchen, tub-shower, tile flooring, upgraded cabinets) | $45,000 | $65,000 |
| High-end conversion (full kitchen with Cambria or Silestone counters, expanded footprint, structural modifications, premium fixtures) | $65,000 | $80,000 |
Five variables push any garage conversion ADU in University Park up or down this range. First, the existing garage condition: a 1980s CBS garage with a sound slab and decent roof structure starts cheaper than a post-Andrew retrofit with wood framing or water-damaged elements. Second, plumbing distance: if the garage sits far from the main house sewer line, we trench and pump, which adds $3,000-$7,000. Third, electrical service: a 200-amp main panel with spare capacity saves money; a 100-amp panel requiring upgrade adds $2,500-$5,000. Fourth, material grade: KraftMaid semi-custom cabinets versus a big-box stock line can swing $4,000-$8,000 alone. Fifth, permit scope: a simple conversion with no setback variances moves faster than one requiring zoning relief or parking replacement waivers.
Our written estimates itemize labor, materials, permits, and a contingency line for unforeseen conditions. They do not include appliance packages, window treatments, or landscaping to replace lost driveway space - those sit outside the construction contract unless you add them.
What University Park Homes Specifically Do to This Job
Iron Fence in University Park and other construction must account for the fact that this area sits entirely within Miami-Dade County’s High Velocity Hurricane Zone, and that changes everything about how we build here. Every product - every window, every door, every roofing fastener, every piece of structural hardware - must carry a separate Miami-Dade Notice of Acceptance (NOA) beyond standard Florida Building Code compliance. Out-of-area contractors routinely show up with FBC-compliant materials that lack this second approval layer, then watch inspectors reject them and force expensive last-minute substitutions that stall jobs for weeks. We vet every item in the submittal phase, before ordering, because we’ve seen what happens when that step gets skipped.
The housing stock here is overwhelmingly concrete block structure built from the 1970s through the 1990s, with many properties substantially rebuilt or retrofitted after Hurricane Andrew to meet updated Miami-Dade codes. Those CBS walls and slabs are durable, but they also mean any new opening we cut for an entrance or window requires core drilling through 8-inch block, then proper lintel support. We don’t guess at the rebar pattern; we scan first.
Then there’s the water table. University Park’s position on the western edge of Miami-Dade, hard against Everglades drainage systems, means grade-level work can hit standing water within two to three feet of the surface during the June-October rainy season. Any garage conversion ADU that needs slab cutting, footer additions, or utility trenching gets scheduled with weather contingency and sealed forming systems. We’ve learned to pour fast and cure faster in this soil.
Finally, the proximity to Florida International University means some properties fall under stricter multi-family or student-housing oversight, and HOA rules in pockets of University Park can restrict exterior appearance, parking replacement, or rental duration. We pull those documents in week one so the design doesn’t conflict with covenants that could block your certificate of occupancy.
Serving University Park, FL - Our Local Coverage Area
We’re based in the University Park 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 University Park
Most projects take 10 to 16 weeks after permit issuance, with permitting itself adding 4 to 8 weeks depending on Miami-Dade review cycles. The total timeline from signed contract to move-in readiness is typically 4 to 6 months. Call (844) 665-0162 and we can assess whether your specific property falls on the faster or slower end.
Yes, absolutely. Miami-Dade requires full building permits, plumbing permits, electrical permits, and a certificate of occupancy for any garage conversion ADU used as a dwelling. Zoning must also allow ADUs on your lot; we verify this in our initial feasibility review at no charge.
Sometimes, but rarely in a way that produces a functional unit. Most garages lack sewer connections, so we trench to the main house line. Electrical panels often need capacity upgrades or subpanel additions. We design to minimize relocation costs, but a legal ADU requires proper utility infrastructure - there’s no permit path around it.
Typically yes. A garage conversion ADU in University Park runs $30,000-$80,000, while new detached ADU construction starts around $90,000 and climbs past $200,000. You’re leveraging existing walls, roof, and slab. The savings disappear if the garage needs extensive structural repair, but most sound CBS structures convert efficiently.
We warranty our workmanship for one year from certificate of occupancy. Manufacturer warranties cover the products we install - cabinets, countertops, windows, fixtures - and vary by brand. We register every warranty in your name and provide the documentation at project closeout so you’re not chasing paperwork later.
Ready to Convert Your Garage? Let’s Look at It Together
A garage conversion Home Additions & ADU services in University Park is one of the fastest ways to add legal living space without expanding your home’s footprint. We’ll walk your property, check the slab, the panel, and the sewer line location, then deliver a written estimate with real numbers and a realistic timeline. Call (844) 665-0162 to schedule your free on-site consultation. Raymond Estevez or a senior member of our team will handle the visit personally.
Written by Raymond Estevez, Owner at Groundwork Construction Co., serving University Park and South Florida homeowners since our founding.