What Does a Garage Conversion ADU Cost and Involve in Lauderdale Lakes?
A garage conversion ADU in Lauderdale Lakes transforms your existing garage into a permitted, habitable living unit, typically running $30,000-$80,000 and taking 8-14 weeks from permit approval to final inspection. Most Lauderdale Lakes garages were built between 1960 and 1975 as simple storage shells, so the work involves bringing structure, electrical, plumbing, HVAC, and insulation up to current Florida Building Code standards for residential occupancy. Call (844) 665-0162 and we’ll walk your specific garage and give you a written estimate with no obligation.
How We Convert a Garage to an ADU, Step by Step
Every garage conversion ADU in Lauderdale Lakes follows the same five stages, though the sequence inside each stage shifts based on what we find once walls open. Here’s how it actually plays out.
Stage 1: Site Evaluation and Scope Lock (Week 1)
We measure the garage footprint, confirm setback compliance with Broward County’s zoning, and test what you’re working with. In Lauderdale Lakes, that means checking whether the slab was poured with a vapor barrier (many 1960s slabs weren’t), whether the roof structure can handle insulation and drywall loads, and whether the electrical panel has capacity for a sub-panel or needs upgrading. You’ll decide at this stage whether you’re building a full kitchen or a kitchenette, whether the unit needs its own meter, and whether you’re adding a bathroom or using existing house plumbing. We photograph everything, mark up a floor plan, and send you a fixed-price proposal with line-item alternates.
Stage 2: Design, Permitting, and Engineering (Weeks 2-6)
We produce permit drawings showing the conversion layout, electrical load calculations, and any structural modifications. Lauderdale Lakes falls under Broward County’s unified building department, and garage conversion ADU permits here require Florida Building Code compliance including impact-rated openings if the garage faces a wind-borne debris region, plus energy compliance with the Florida Energy Conservation Code. Because many Lauderdale Lakes homes were built before post-Andrew wind-load requirements, we often need an engineer to sign off on roof-to-wall connections or garage door infill framing. This is the longest stage, and there’s little to speed it up, county’s review queue sets the pace.
Stage 3: Demolition and Rough Construction (Weeks 7-9)
We strip the garage to studs, remove or infill the overhead door, and frame new interior partitions, window openings, and any door relocations. The slab gets assessed for levelness, pitch correction, and moisture intrusion. In Lauderdale Lakes, we regularly find the original garage slab was poured below the main house slab with no damp proofing, groundwater sits 18-30 inches below grade in summer, so we often install a perimeter French drain and sump system before laying flooring. You’ll choose your final flooring material at this point, it affects subfloor prep.
Stage 4: MEP Rough-In and Inspection (Weeks 10-11)
Mechanical, electrical, and plumbing systems go in. For a garage conversion ADU with a full bathroom, this means trenching through the slab for drain lines, running supply from the main, and venting through the roof. Electrical includes AFCI/GFCI protection, dedicated circuits for kitchen appliances, and often a mini-split HVAC system. We call for Broward County rough inspections at this stage, electrical, plumbing, and mechanical, and nothing gets covered until they pass.
Stage 5: Insulation, Finish, and Final Inspection (Weeks 12-14)
We insulate walls and ceiling to current R-values, hang drywall, install flooring, cabinets, countertops, fixtures, and appliances, then paint and trim. The final Broward County inspection covers fire separation between ADU and main house, egress window operation, and full systems testing. We hand you completed permit cards and as-built drawings for your records.
The Choices You’ll Make for Your Garage Conversion ADU
Every decision below moves your number and shapes how the unit functions long-term. We lay out the honest trade-offs so you’re not guessing.
- Kitchenette vs. full kitchen: A kitchenette with a mini-fridge, microwave, and single-bowl sink runs $4,000-$8,000 and keeps plumbing simple. A full kitchen with range, dishwasher, and full cabinetry runs $12,000-$25,000 but rents for 30-40% more. In Lauderdale Lakes’s rental market, the full kitchen usually pays back within three years.
- Bathroom addition vs. shared access: Adding a bathroom means cutting the slab for drain lines, typically $8,000-$15,000 in this market. Sharing bathroom access with the main house avoids that cost but limits the unit’s independent rental or in-law appeal.
- Mini-split HVAC vs. extending central: A dedicated mini-split ($3,500-$7,000) gives the ADU its own thermostat and metered electric. Extending your existing central system is cheaper upfront but can overload an aging unit and blurs utility accounting.
- Standard windows vs. impact-rated: Standard windows cost less but may not pass Broward County’s wind-borne debris requirements depending on your garage’s exposure. We verify your specific zone during evaluation, impact-rated adds $1,500-$4,000 typically.
- Floor finish: Luxury vinyl plank handles slab moisture well and installs fast, $3-$6 per square foot. Tile is bulletproof but colder and harder underfoot. Engineered wood looks warmer but can struggle with seasonal humidity swings in South Florida.
Many homeowners doing a garage conversion ADU in Lauderdale Lakes also update the main house’s kitchen or bath while we’re mobilized. If that fits your plans, our Home Additions & ADU in Lauderdale Lakes page covers full-scope projects, and you can explore Cabinets & Countertops in Lauderdale Lakes or Backsplash, Tile & Flooring in Lauderdale Lakes for the interior finishes.
What Garage Conversion ADU Costs in Lauderdale Lakes, FL
Garage conversion ADU in Lauderdale Lakes typically ranges from $30,000 to $80,000. Here’s what pushes a project toward the low or high end of that span.
| Cost Factor | Low-End Driver | High-End Driver |
|---|---|---|
| Garage size and condition | Single-car, dry slab, intact roof | Double-car, moisture damage, structural repair needed |
| Kitchen and bath scope | Kitchenette, no bath or shared bath | Full kitchen, new bath with slab trenching |
| Utility connections | Existing panel capacity, shared HVAC | Panel upgrade, dedicated meter, mini-split |
| Code compliance level | Minimal structural, standard windows | Engineered connections, impact glazing, full energy upgrade |
| Finish grade | Basic cabinets, LVP flooring, stock fixtures | Custom cabinetry, tile, Kohler or Moen fixtures, Silestone or Caesarstone counters |
Our written estimates include demolition, framing, insulation, drywall, MEP rough and finish, flooring, cabinetry, countertops, fixtures, painting, and permit fees. What typically isn’t included: separate electrical service upgrade from FPL, landscape restoration beyond the immediate work area, and appliance packages, though we coordinate delivery and installation. We don’t quote until we’ve walked the garage and reviewed your panel and plumbing access.
What Lauderdale Lakes Homes Specifically Do to This Job
Lauderdale Lakes was built out almost entirely between 1959 and 1975 as one of Broward County’s earliest western suburban expansions, leaving the city with a dense, largely static stock of 50-65-year-old CBS homes where roofs, electrical systems, and drain lines are aging out simultaneously. That history shapes every garage conversion ADU we do here.
The dominant single-family homes are concrete block stucco on slab, many with flat or very low-slope built-up roofs. Their original garage slabs were often poured without vapor barriers, and with the water table sitting 18-30 inches below grade during summer, we regularly find moisture migration through the slab that standard flooring won’t tolerate. We test with calcium chloride kits before specifying any finish.
More critically, Broward County enforces Florida’s 50% rule: if your renovation’s assessed value exceeds half your structure’s assessed value, the entire structure must be brought to current Florida Building Code, including wind-load and energy requirements. Because Lauderdale Lakes homes carry relatively modest assessed values compared to Plantation or Fort Lauderdale, garage conversion ADU projects with full kitchens and baths frequently trigger this threshold. We’ve seen $45,000 garage conversions balloon to $80,000 because the county required roof tie-down upgrades, impact window replacement throughout the house, and electrical service upgrades. We flag this possibility during our first walkthrough and run preliminary numbers so you’re not surprised six weeks in.
We also know the specific failure mode of these homes: original cast iron roof drains and vertical standpipes that have corroded through after 50+ years, creating concealed water migration down inside block walls. It presents as a ceiling stain but requires opening the wall cavity to fully remediate. Out-of-area contractors routinely underscope this, we spot it immediately and build the fix into our proposal if needed.
Our Lauderdale Lakes crew has handled this housing stock for years. We’re familiar with Broward County’s inspection schedule, the specific plan reviewers who handle ADU conversions, and the common corrections they flag. That local fluency saves weeks.
Serving Lauderdale Lakes, FL - Our Local Coverage Area
We’re based in the Lauderdale Lakes 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 Lauderdale Lakes
From permit submission to final inspection, expect 8-14 weeks. Broward County’s plan review typically takes 3-4 weeks for garage conversion ADU permits, and construction moves fastest when no structural engineering or electrical service upgrades are required. Call (844) 665-0162 and we can give you a tighter range after seeing your garage.
Yes, absolutely. Broward County requires building, electrical, plumbing, and mechanical permits, plus zoning verification that your lot meets setback and parking requirements. Operating an unpermitted ADU exposes you to fines, insurance denial, and eviction complications if you’re renting it. We handle every permit pull and inspection scheduling as part of our standard process.
Sometimes, but only if your garage already sits near existing drain lines and your slab is in good condition. Most Lauderdale Lakes garages need at least some slab cutting for bathroom or kitchen drains, and nearly all need the overhead door opening infilled with framed wall. We design to minimize structural changes, but code compliance usually requires some modification.
Typically yes, a garage conversion ADU runs $30,000-$80,000 in Lauderdale Lakes, while detached ADU construction starts around $90,000 and runs to $220,000. You’re leveraging existing structure, roof, and slab. The savings disappear if your garage needs extensive remediation, moisture control, or if the 50% rule triggers whole-house code upgrades.
We warranty our workmanship for one year from final inspection, and all materials carry their manufacturer warranties, Kohler fixtures, Moen valves, Silestone or Caesarstone surfaces, each backed by their own terms. We provide warranty documentation at closing and respond to any issues directly, no passing you between subcontractors. For warranty specifics on your material selections, call (844) 665-0162.
Ready to Convert Your Garage? Let’s Walk It Together.
We’ll come to your Lauderdale Lakes property, measure the garage, check your panel and plumbing access, and give you a written estimate with line-item pricing and no pressure. Call (844) 665-0162 to schedule, or ask about how a garage conversion ADU fits into a larger Home Additions & ADU project with our full-scope team.
Written by Raymond Estevez, Owner at Groundwork Construction Co., serving Lauderdale Lakes and Broward County homeowners.