Garage Conversion ADU in Melrose Park - Scope, Timeline, and Cost
A garage conversion ADU in Melrose Park turns your existing attached or detached garage into a permitted, habitable dwelling unit with its own kitchenette, bathroom, sleeping area, and separate entrance. Most conversions we handle here run 3 to 5 months from permit submission to final inspection, with the build phase itself taking 8 to 14 weeks depending on whether we’re reworking the slab, roofline, or utilities. In Melrose Park, budget $30,000 to $80,000 for a typical garage conversion ADU, though jobs that require extensive electrical service upgrades, plumbing relocation, or HVHZ-compliant window and door packages can push toward the higher end. Call (844) 665-0162 and we’ll walk your specific garage with you - estimates are free, and we bring a checklist tailored to Broward County’s permitting requirements.
How We Convert a Garage to an ADU - Start to Finish
We’ve learned that garage conversion ADU projects in Melrose Park go smoothest when homeowners know what’s coming and when they need to make decisions. Here’s how we stage every job.
Stage 1: Feasibility and existing conditions (Week 1)
We walk the garage, measure twice, and photograph everything - slab condition, roof structure, electrical panel location and capacity, proximity to sewer and water lines, and whether the existing slab has a moisture barrier. In Melrose Park’s 1950s-1970s housing stock, we often find original flat roofs with inadequate pitch for drainage, or electrical panels that need upgrading from 100-amp to 200-amp service to support a full dwelling unit. You decide at this stage whether you want a full kitchen or a kitchenette, whether the bathroom needs a shower or just a wet bath, and whether you’re keeping the existing garage door opening as your entry or framing it in for a conventional door and window layout.
Stage 2: Design and Broward County permitting (Weeks 2-6)
Because Melrose Park is unincorporated, all permits route through the Broward County Building Division, not a city office. We prepare HVHZ-compliant structural plans, energy calculations, and impact-rated opening schedules. The county reviews garage conversion ADU plans for compliance with Florida Building Code wind-load requirements, which means every window, exterior door, and skylight must carry a Miami-Dade or Florida Product Approval number. This stage takes 4 to 6 weeks depending on review-cycle volume. You finalize material selections here - flooring, cabinetry, countertop, fixtures - so we can order long-lead items before demolition starts.
Stage 3: Demolition and rough prep (Weeks 7-9)
We strip the garage to studs, remove the overhead door and track, and address slab issues. Many Melrose Park garages sit on original slabs with no vapor barrier and minor cracking from decades of vehicle loading. If the slab’s sound, we grind and seal; if it’s heaved or too thin for insulation and flooring, we pour a new floating slab or use a self-leveling underlayment system. We also rough in plumbing drains, water supply, and electrical home runs at this stage. You won’t make many decisions here, but you do confirm final fixture locations - toilet, vanity, kitchen sink, any appliance rough-ins - because moving them later gets expensive fast.
Stage 4: Framing, MEP, and envelope (Weeks 10-16)
We frame interior partitions, install HVAC mini-split or extend your main system if capacity allows, run electrical circuits including GFI protection and smoke/CO detection tied to the main house, and plumb the kitchenette and bathroom. For the exterior, we infill the old garage door opening with framed wall assemblies rated for HVHZ wind pressures, install impact-rated windows and doors, and tie the roof into the existing structure with proper flashing. In Melrose Park’s hurricane zone, we spec ring-shank nails, reinforced corner straps, and peel-and-stick underlayment at vulnerable transitions. You choose paint colors, hardware finishes, and any built-in shelving or storage at this point.
Stage 5: Finish work, inspection, and certificate of occupancy (Weeks 17-20)
We install flooring, cabinets, countertops, fixtures, appliances, and trim. Broward County conducts rough and final inspections for structural, electrical, plumbing, and mechanical systems, plus a final walkthrough for code compliance and life safety. Once we clear the certificate of occupancy, your garage conversion ADU is legally rentable or occupiable as a separate dwelling unit. We do a punch walk with you, address any items, and hand over maintenance guides for the systems we installed.
The Options You’ll Choose Between for Your Garage Conversion ADU
Every garage conversion ADU in Melrose Park involves trade-offs between first cost, durability, and daily livability. These are the decisions that actually move your budget and your satisfaction with the finished space.
- Slab strategy: seal and insulate vs. pour new. Sealing an existing slab with a moisture-mitigation epoxy and laying luxury vinyl plank or tile runs $8-$14 per square foot and works if the slab’s flat and structurally sound. Pouring a new floating slab with proper vapor barrier and insulation adds $12-$20 per square foot but eliminates mustiness and gives you a thermal break - worth it in Melrose Park’s humid climate where slab-on-grade garages often wick moisture year-round.
- Kitchenette vs. full kitchen. A kitchenette with a two-burner induction cooktop, under-counter fridge, and single-bowl sink fits most garage footprints and keeps plumbing simple. A full kitchen with range, dishwasher, and full-size refrigerator requires 220V electrical, a larger grease-rated vent, and more cabinet linear footage - adding $4,000-$8,000 but making the unit genuinely independent for long-term rental.
- Wet bath vs. full bathroom. A wet bath with wall-hung toilet, corner sink, and handheld shower on a single waterproofed floor plane saves space and works in garages under 400 square feet. A full bathroom with separate shower enclosure, vanity, and water closet needs 35-40 square feet minimum and standard ceiling height - feasible in many Melrose Park detached garages but sometimes impossible in low-clearance attached units without roof modifications.
- HVAC: mini-split vs. extending central system. A dedicated mini-split with heat pump gives the ADU independent climate control and is usually simplest to permit and install - $3,500-$6,500 for a single-zone system. Extending your home’s central air requires load calculations, possible equipment upsizing, and duct runs through attic or soffit space; it can work but often costs more and creates maintenance coordination issues between tenant and owner.
- Entry configuration: retained garage door vs. framed wall with door and window. Keeping a garage door and adding a man door alongside preserves future reversion to garage use and costs less upfront. Framing in the opening with HVHZ-rated wall assembly, impact window, and pre-hung door gives better insulation, security, and curb appeal - but requires structural engineering and adds $3,000-$6,000 depending on opening width and finish materials.
What Garage Conversion ADU Costs in Melrose Park, FL
In Melrose Park, a garage conversion ADU typically costs $30,000 to $80,000. Here’s what pushes a job toward the low or high end of that range.
| Cost Factor | Low-End Impact | High-End Impact |
|---|---|---|
| Garage size and condition | 400 sq ft, sound slab, good roof | 600+ sq ft, failing slab, low roofline |
| Utility relocation | Kitchenette and wet bath near existing lines | Full kitchen and bath requiring new sewer/water taps |
| Electrical service | Existing 200-amp panel with spare capacity | 100-amp panel requiring full service upgrade |
| Material grade | Stock cabinetry, LVP flooring, fiberglass shower | Custom cabinets, tile or engineered hardwood, frameless glass |
| Permit scope and HVHZ compliance | Minimal structural changes, standard impact windows | Roof modifications, engineered beams, high-end impact doors |
A written estimate from us includes demolition, rough and finish carpentry, plumbing and electrical rough-in and trim, HVAC, insulation, drywall, flooring, cabinets, countertops, fixtures, paint, and all Broward County permit fees and inspection scheduling. It does not include appliance packages, window coverings, furniture, or any required landscaping or parking reconfiguration triggered by ADU code - those we line-item separately so you decide what to source yourself.
Jobs at the $30,000 mark are typically smaller attached garages with kitchenettes, wet baths, and minimal structural work. At $80,000, you’re looking at a detached two-car garage with full kitchen, full bathroom, mini-split HVAC, new slab, roof modifications for ceiling height, and premium finishes throughout. Call (844) 665-0162 for an exact quote on your specific garage - estimates are free, and we bring a tablet to show you comparable completed projects.
What Melrose Park Homes Specifically Do to This Job
Melrose Park’s unincorporated status and its position squarely within Florida’s High Velocity Hurricane Zone make garage conversion ADU work here meaningfully different from the same job in neighboring Oakland Park or Lauderdale Lakes. Every permit runs through the Broward County Building Division’s online portal, and every inspection follows county cadence - not municipal. Contractors accustomed to city building departments with walk-in counters and expedited re-inspections often misread the timeline. We’ve seen out-of-area crews lose two weeks waiting for a structural re-inspection because they didn’t pre-upload HVHZ connector schedules the county requires at rough framing.
The housing stock matters too. Most garages we convert in Melrose Park were built between 1955 and 1975, slab-on-grade with no basement, original flat or low-slope roofs, and unreinforced garage door openings. That means three predictable conditions: the slab often needs moisture mitigation, the roof may need re-framing to achieve habitable ceiling height, and the old garage door header rarely meets current HVHZ wind-load requirements without supplemental engineering. We also factor Broward’s water table, sitting just 2-4 feet below grade, into any drainage or utility trenching - even shallow excavation can hit water, so we plan pump-around or dewatering into the schedule rather than react to it.
Because the entire area falls under HVHZ, every exterior window and door in your garage conversion ADU must carry a Miami-Dade Notice of Acceptance or Florida Product Approval. This isn’t a suggestion - it’s a hard stop at inspection. We spec Andersen, Pella, or PGT impact-rated products as standard, not upgrades, because anything less won’t pass. And with hurricane season running June through October, we time exterior envelope work to minimize exposure of open framing to sudden weather events, building in buffer weeks that more northern contractors might not consider necessary.
Serving Melrose Park, FL - Our Local Coverage Area
We’re based in the Melrose 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 Melrose Park
Most garage conversion ADU projects in Melrose Park take 3 to 5 months from permit submission to certificate of occupancy, with the construction phase itself lasting 8 to 14 weeks. Broward County’s plan review typically adds 4 to 6 weeks before we can start demolition, so we use that window to order long-lead materials. Call (844) 665-0162 and we’ll give you a timeline based on your garage’s current condition and the scope you’re considering - estimates are free.
Yes - because Melrose Park is unincorporated, all permits route through the Broward County Building Division, and a garage conversion ADU requires full building, electrical, plumbing, and mechanical permits plus HVHZ compliance documentation. The county will also verify that your property meets zoning requirements for ADU square footage, setbacks, and parking. We handle the entire permit package and inspection scheduling as part of our project management.
You can minimize relocation costs by designing the kitchenette and bathroom layout around existing utility locations, but some movement is almost always necessary in Melrose Park’s older homes. Original garage electrical is rarely sufficient for a dwelling unit’s needs - you’ll typically need dedicated circuits, GFI protection, and often a panel upgrade. Plumbing can sometimes stay close to the house’s main stack if the garage shares a wall, but sewer lines need proper slope and venting that original construction didn’t account for.
A garage conversion ADU in Melrose Park generally costs 30% to 50% less than a new detached ADU because you’re working within an existing structure and foundation. New detached ADU construction here runs $90,000 to $220,000, while garage conversions range $30,000 to $80,000. The savings come from reusing slab, walls, and roof; the trade-off is that you’re constrained by the garage’s footprint and ceiling height. For a full Home Additions & ADU in Melrose Park comparison including detached options, we can review both paths on-site.
We warranty our workmanship on garage conversion ADU projects for one year from certificate of occupancy, with manufacturer warranties passing through on all materials and fixtures - typically 10 years on cabinets, lifetime on certain quartz countertops, and 5 to 10 years on windows and doors depending on brand. We also remain your point of contact for warranty claims; you don’t chase manufacturers yourself. For specifics on your preferred material package, call (844) 665-0162 and we’ll detail what’s covered.
Ready to Convert Your Melrose Park Garage?
We’ll walk your garage, check slab condition, existing utilities, and roof structure, then deliver a written estimate with line-item pricing and a realistic timeline based on Broward County’s current permit review schedule. No pressure, no generic pitch - just the specifics your project needs. Call (844) 665-0162 to schedule your free on-site estimate for a garage conversion ADU in Melrose Park.
Many homeowners who convert their garage also update the main house while Melrose Park crews are on-site. If you’re considering a kitchen refresh or bathroom update as part of a broader project, our Home Additions & ADU team coordinates everything under one contract. We also see clients pair their garage conversion with Cabinets & Countertops in Melrose Park for the main house kitchen, or with Backsplash, Tile & Flooring in Melrose Park to unify finishes across the property. One contractor, every phase - you choose the brand, we handle the build.
Written by Raymond Estevez, Owner at Groundwork Construction Co., serving Melrose Park and Broward County homeowners since 2015.