Garage Conversion ADU in The Acreage: What It Costs and How Long It Takes
A garage conversion ADU in The Acreage typically runs $30,000-$80,000 and takes 8-14 weeks from permit to final inspection, depending on whether you’re converting an attached two-car garage or a detached workshop. Most of the homes we work on in The Acreage were built between the mid-1980s and early 2000s, so the existing slab, electrical panel, and roof condition drive the timeline more than the finish selections. Call (844) 665-0162 and we’ll walk your property to give you a written estimate with line-item pricing.
How We Convert a Garage to an ADU in The Acreage
We break every garage conversion ADU in The Acreage into five stages. Homeowners know exactly what we’re doing, what they’re paying for, and what decision they need to make before we can move forward.
Stage 1: Site evaluation and as-built documentation (3-5 days)
We measure the existing structure, photograph the slab condition, and verify what’s actually in the walls. In The Acreage, we regularly find detached garages built on monolithic slabs with no footing depth adequate for living space, or electrical fed from a subpanel that can’t handle a kitchen and HVAC load. You’ll decide at this stage whether to proceed with the existing footprint or expand it. We also flag any well or septic field proximity issues that Palm Beach County setbacks might affect if you’re considering a small addition beyond the original garage perimeter.
Stage 2: Design, permit drawings, and Palm Beach County submission (3-6 weeks)
Our draftsperson produces plans showing the conversion layout, egress window placement, electrical load calculations, and tie-in to existing utilities. Because The Acreage is unincorporated, everything routes through the county. We schedule your intake appointment early in the week; inspectors here cover enormous territory, and a Friday submission can sit until the following Wednesday. You’ll choose your layout at this stage: studio, one-bedroom, or efficiency with kitchenette. You’ll also decide whether to keep the existing garage door opening as a glazed wall or frame it in with matching CBS block.
Stage 3: Structural prep, slab work, and rough utilities (2-3 weeks)
We strip the interior, address any slab cracks or elevation issues, and install new plumbing stub-outs and electrical home runs. The wet-season water table in The Acreage sits 18-24 inches below grade, so any slab cutting or trenching happens in drier months when possible. If your garage slab lacks a moisture barrier, we’ll recommend a sealed vapor barrier plus engineered flooring rather than direct glue-down. You’ll select your HVAC approach here: mini-split, extended duct from the main house, or packaged terminal unit.
Stage 4: Framing, insulation, drywall, and finishes (3-5 weeks)
We frame interior partitions, run MEP rough-ins through inspection, then close walls and install finishes. This is where most homeowners spend their mental energy: flooring, cabinetry, countertops, tile. We coordinate directly with our Cabinets & Countertops in The Acreage crew if you want the kitchenette to match a main-house remodel, and with our Backsplash, Tile & Flooring in The Acreage team for wet-area and living-space materials that handle Florida humidity.
Stage 5: Final inspection and certificate of occupancy (1-2 weeks)
Palm Beach County conducts final electrical, plumbing, and building inspections. We address any punch items immediately. Because inspectors here drive long distances between rural properties, we bundle everything possible into single visits. You’ll do a walkthrough with Raymond Estevez before we sign off.
The Options You’ll Choose Between for Your Garage Conversion ADU
- Keep the garage door opening or frame it in: Converting the opening to a window wall with sliding glass runs $3,500-$8,000 but gives you natural light and a residential feel. Framing it with CBS block and stucco to match the house costs less upfront, around $1,800-$4,000, but loses the architectural character that helps rental value.
- Mini-split HVAC versus ducted extension: A mini-split system ($2,500-$5,500 installed) is self-contained and doesn’t load your main house panel. Extending ductwork from the main house can cost less if the furnace is nearby, but in The Acreage we often find the main unit is already at capacity on older 150-amp services.
- Wet bath versus full bathroom: A wet bath with fiberglass surround and compact vanity fits most two-car garages for $4,000-$7,500. A full bathroom with separate tub or tiled shower pushes to $8,000-$14,000 and requires more square footage, which may mean stealing space from the living area or bumping the exterior wall.
- Kitchenette versus full kitchen: A kitchenette with mini-fridge, microwave, and two-burner cooktop suits most ADU renters and keeps you under 20 amps. A full kitchen with range, dishwasher, and garbage disposal needs 40+ amps and often triggers a main panel upgrade on homes built before 1995.
- Standard finishes versus upgraded package: We offer both. Standard means LVP flooring, solid-surface countertops, and fiberglass shower surrounds. Upgraded adds tile flooring, quartz or granite countertops, and custom cabinetry. The gap is typically $8,000-$18,000 on a one-bedroom ADU.
Every choice above affects your permit path and inspection schedule, not just your budget. We map that out before you sign so there are no surprises.
What Garage Conversion ADU Costs in The Acreage, FL
| Component | Typical Range |
|---|---|
| Basic garage conversion ADU (attached, studio, standard finishes) | $30,000-$48,000 |
| Mid-range conversion (one-bedroom, upgraded HVAC and kitchenette) | $48,000-$65,000 |
| High-end conversion (detached workshop, full kitchen and bath, premium finishes) | $65,000-$80,000 |
| Main electrical panel upgrade (if required) | $2,500-$5,500 |
| Septic system modification or expansion | $4,000-$12,000 |
Five variables push your number up or down:
Existing structure condition: A detached garage with a cracked slab, wood frame walls, and a low-slope roof needs more remediation than an attached garage built integrally with the house. We see both in The Acreage.
Utility distance and capacity: Running new water, sewer, and electrical from the main house to a detached garage 80 feet away adds trenching, conduit, and possibly a septic field evaluation. The Acreage’s 1.25-acre lots mean distances are often longer than in suburban Royal Palm Beach or Wellington.
Permit scope and inspections: Palm Beach County charges by valuation, and multiple trade inspections add time. If your project triggers a septic modification, that pulls in Florida Department of Health review separately.
Material grade and brand selection: Our Home Additions & ADU crew works with 50+ brands across every category. You choose the tier that matches your rental income projections or family needs.
Whether the garage door stays or goes: Removing a sectional door and infilling the opening with wall and window is straightforward. Converting to a rated egress door or folding glass wall changes structural loading and cost.
Our written estimates include demolition, rough and finish carpentry, MEP rough-in and trim, insulation, drywall, paint, flooring, and fixtures. They do not include permit fees, septic or well work, main panel upgrades, or landscaping restoration. We list every exclusion so you can budget accurately.
What The Acreage Homes Specifically Do to This Job
The Acreage isn’t like the communities to its east. Every lot here is 1.25 acres minimum, every home relies on private well and septic, and nothing connects to municipal sewer or water. That geometry defines every garage conversion ADU we build in The Acreage.
Palm Beach County requires specific setbacks between structures, wells, and drain fields. If your garage sits near your septic tank or drain field, expanding the footprint even by a few feet can trigger a full site plan revision and Health Department review. We evaluate this on day one so you don’t design a layout that can’t be permitted.
The housing stock matters too. Most homes here are CBS construction from the 1980s-2000s growth wave, now hitting the age where electrical panels are 150-amp Federal Pacific or Zinsco models that insurers flag, and galvanized water lines are thinning. A garage conversion ADU in The Acreage often includes upgrading the main house infrastructure to support the addition, not just finishing the garage interior.
Then there’s the water table. During wet season, the ground sits 18-24 inches below grade in areas near the Loxahatchee Slough. Any slab cutting, trenching, or foundation work needs timing and possibly dewatering. We’ve learned to schedule the dirt-heavy phases for spring drydown, not August afternoon thunderstorms.
Finally, the inspection reality. Palm Beach County inspectors cover The Acreage, Loxahatchee, and the western unincorporated grid from offices in West Palm Beach. Drive times are long. We submit for inspection early in the week, bundle trades when possible, and keep the job site clean and accessible so there’s no reason for a reinspection that costs you another week.
Serving The Acreage, FL - Our Local Coverage Area
We’re based in the The Acreage 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 The Acreage
Most garage conversion ADU projects in The Acreage take 8-14 weeks from permit approval to certificate of occupancy, with permit drawings and county review adding another 3-6 weeks before construction starts. Wet-season slab work or septic modifications can extend that by 2-4 weeks. Call (844) 665-0162 and we’ll give you a timeline based on your specific property.
Yes, every garage conversion ADU in The Acreage requires Palm Beach County building permits, plus electrical, plumbing, and possibly septic or well permits depending on your property layout. Because The Acreage is unincorporated, there is no municipal building department to shortcut the process. We handle all submissions and coordinate inspections as part of our Home Additions & ADU in The Acreage service.
You can if the garage already has adequate electrical service and you’re adding only a kitchenette and wet bath within the existing footprint. Most The Acreage homes from the 1980s-2000s need at least a subpanel addition or main service upgrade to handle the new load. We’ll know after the stage 1 site evaluation.
A garage conversion ADU in The Acreage is almost always cheaper than new detached construction because you’re working with an existing slab, roof, and walls. Our garage conversions start at $30,000, while detached ADU construction in this market typically runs $90,000-$220,000. The trade-off is square footage and privacy; a detached unit gives you both, but at significantly higher cost.
We warranty our workmanship for one year from certificate of occupancy. Manufacturer warranties apply to specific products you select: HVAC equipment, windows, doors, flooring, and fixtures each carry their own terms. We document every warranty and registration requirement in your closeout packet. For questions about coverage on a specific product, call (844) 665-0162 and we’ll pull the details.
Get a Free On-Site Estimate for Your Garage Conversion ADU in The Acreage
We’ll walk your property, measure the existing garage, check your electrical panel and septic layout, and give you a written estimate with line-item pricing for your garage conversion ADU in The Acreage. No deposit required to schedule. Call (844) 665-0162 or request a visit online. Raymond Estevez handles the initial consultation personally.
Written by Raymond Estevez, Owner at Groundwork Construction Co., serving The Acreage since our South Florida founding.