Junior ADU & Interior Conversion in The Acreage, FL - What’s Involved & What It Costs
The Acreage Home Additions & ADU team turns an existing portion of your home-typically a primary bedroom suite with attached bath and a separate exterior entrance-into a self-contained living unit. Most projects we handle here run 6-10 weeks from permit pull to final inspection, with costs ranging from $45,000 to $130,000 depending on how much structural, mechanical, and finish work your specific layout requires. Call (844) 665-0162 to walk through your floor plan and get a free written estimate.
How We Approach Junior ADU & Interior Conversion in The Acreage
Every junior ADU starts with a constraint: you’re working inside an existing envelope, not building fresh. In The Acreage, that envelope is usually mid-1980s to early-2000s CBS construction with concrete slab floors, which means plumbing relocation is expensive and electrical service upgrades are common. Here’s how we sequence it.
Stage 1: Site measure and feasibility (3-5 days)
We visit your property, verify your well and septic layout against Palm Beach County setback rules, and confirm whether your chosen space can accommodate a kitchenette without moving the main drain line. You’ll decide at this stage whether you want a wet bar-style kitchenette or a full cooking setup, because that choice determines whether we’re tapping existing plumbing or running new lines across the slab. We also check your electrical panel capacity; many homes in The Acreage still run original 150-amp service that won’t handle an additional dwelling unit without an upgrade.
Stage 2: Design and permit documents (2-3 weeks)
Our draftspeople produce plans showing the new kitchenette layout, the separate entrance modification, fire separation details between the JADU and main living area, and any window egress changes. You’ll choose your cabinet line, countertop material, and flooring at this point so we can spec exact rough-in locations. Because The Acreage is unincorporated, permits pull through Palm Beach County’s central office in West Palm Beach, and we submit electronically to avoid the in-person queue.
Stage 3: Demolition and rough mechanicals (2-3 weeks)
We frame any new interior partitions, open walls for plumbing and electrical rough-in, and modify the exterior wall for the separate entrance door. If your project requires a kitchen sink on the opposite side of the house from existing drains, we may need to run a sewage ejector pump system rather than break concrete, which adds cost but preserves your slab. Your HVAC decision happens here: extend the main system with zoning controls, or install a dedicated mini-split? We typically recommend mini-splits for JADUs under 500 square feet to avoid overloading an aging central unit.
Stage 4: Insulation, drywall, and finishes (2-3 weeks)
We close walls, install insulation to current Florida Energy Code, hang drywall, and begin finish carpentry. You’ll do your final cabinet, countertop, tile, and flooring selections during this window if you haven’t already. Flooring transitions matter in JADUs; we often see homeowners in The Acreage choose luxury vinyl plank for moisture tolerance near kitchenettes, especially in homes where the original slab has minor settling cracks.
Stage 5: Final inspection and punch list (3-7 days)
Palm Beach County inspectors verify fire separation, egress compliance, and mechanical systems. We schedule these early in the week, because inspectors covering The Acreage’s rural grid face long drive times between properties, and Friday slots often get bumped. Once we pass, you receive your certificate of occupancy and we walk the space together for any final adjustments.
The Material and Configuration Choices You’ll Make
Junior ADU & Interior Conversion in The Acreage forces specific decisions that don’t come up in new construction. Here’s what actually moves the needle:
- Kitchenette footprint: wet bar vs. full cooking. A wet bar with microwave, mini-fridge, and sink runs $4,000-$8,000 in cabinetry and appliances. A full four-burner range, dishwasher, and standard refrigerator needs 7-10 linear feet of cabinet run, proper ventilation, and typically a 220-volt circuit. Budget $12,000-$22,000 for the full setup. Most JADU renters don’t need more than the wet bar; most long-term family arrangements do.
- Separate entrance: retrofit existing window or cut new opening. Converting an existing window to a code-compliant egress door costs less if the header sizing works, but many 1980s-era windows sit on non-load-bearing walls with insufficient structural support above. A new cut in a load-bearing wall requires an engineered header and potentially post-tension slab analysis, which can add $3,500-$7,500.
- Electrical service: upgrade or load-manage. If your panel has space, we can add a subpanel for the JADU circuits. If you’re full, a 200-amp service upgrade with new meter base runs $4,500-$8,000 in The Acreage, including FPL coordination. We always verify this before quoting so you’re not surprised mid-project.
- Plumbing path: gravity drain or ejector pump. Slab homes with kitchenettes far from existing stacks need pumped waste systems. A quality sewage ejector installation adds $2,800-$4,500 but eliminates concrete cutting and potential slab moisture issues, which matters in The Acreage’s high water table conditions.
- Climate separation: shared HVAC or dedicated system. Extending central air with zoning dampers costs $3,000-$6,000 but ties the JADU to your main system’s maintenance cycle. A dedicated mini-split runs $2,500-$5,500 installed, gives the occupant independent control, and simplifies billing if you rent the unit.
What Junior ADU & Interior Conversion Costs in The Acreage, FL
| Component | Typical Range |
|---|---|
| Base Junior ADU & Interior Conversion | $45,000 - $130,000 |
| Kitchenette (wet bar level) | $4,000 - $8,000 |
| Kitchenette (full cooking) | $12,000 - $22,000 |
| Electrical service upgrade | $4,500 - $8,000 |
| Sewage ejector pump system | $2,800 - $4,500 |
| Separate entrance modification | $2,500 - $7,500 |
| Dedicated mini-split HVAC | $2,500 - $5,500 |
Five factors push your project to the high or low end of that $45,000-$130,000 range:
Size and existing layout. A 400-square-foot master suite conversion with bath already in place starts near the bottom. A 650-square-foot multi-room reconfiguration with new plumbing runs across the slab trends toward $90,000-plus.
Structural modifications. Any load-bearing wall work, post-tension slab concerns, or roofline changes for entrance canopies adds engineering and permit complexity.
Mechanical relocation scope. Moving the main drain, upgrading electrical service, or adding dedicated HVAC each represents a discrete cost layer. We itemize these in our estimates so you can phase them if needed.
Material grade. Stock cabinetry from our entry-level lines versus custom KraftMaid or Wellborn configurations can swing kitchenette costs by 40%. Same for flooring: LVP at $4/square foot installed versus engineered hardwood at $12.
Permit and inspection timing. Palm Beach County permit fees for JADUs run roughly $1,200-$2,800 depending on valuation, but delays from incomplete documentation or failed inspections extend labor costs. We front-load detail in our submittals to avoid this.
What’s included in our Home Additions & ADU services: all labor, rough and finish materials, permit fees, and final cleaning. What’s typically separate: appliance packages (we rough in for your purchased units), window treatments, and any well or septic system modifications required by county health department rules.
What The Acreage Specifically Means for This Job
The Acreage’s defining reality is geometry on 1.25-acre lots with private wells and septic systems. Palm Beach County requires strict setbacks between structures, wells, and drain fields, and because a Junior ADU & Interior Conversion in The Acreage doesn’t add new footprint, you’d think this wouldn’t matter. It does. We’ve seen homeowners assume their interior conversion avoids site plan review, only to learn that modifying the home’s entrance or adding a second meter base triggers a re-evaluation of well and septic clearances. We verify this in our first site visit so your permit doesn’t stall at plan check.
The housing stock matters too. Most homes here were built during the 1985-2005 growth wave, and many still carry original electrical panels, single-pane windows, and plumbing that predates current Florida Building Code. A JADU in a 1992 CBS home often requires more systemic upgrading-and sometimes our Roof Repair service in The Acreage-than the same project in a 2015 build in Wellington. We price for this honestly rather than discovering it mid-demolition.
Then there’s water. The Acreage sits adjacent to the Loxahatchee Slough, and the seasonal water table can rise to within 18-24 inches of grade during summer months. Any plumbing work that disturbs the slab, or any new exterior entrance cut that changes grade drainage, needs to account for this. We’ve learned to schedule slab-adjacent work in drier winter windows when possible, and to specify moisture-mitigating details, like sealed vapor barriers under new flooring, that we might skip in better-drained neighborhoods.
Finally, the inspection rhythm. Because The Acreage is unincorporated and sprawling, county inspectors cover enormous territory. Locals know to request Monday or Tuesday inspection slots; Thursday and Friday appointments get bumped by weather, traffic on Seminole Pratt Whitney Road, or simply the accumulated delays of a rural route. We build this scheduling reality into our timeline from day one.
Serving The Acreage, FL - Our Local Coverage Area
We’re based here, serving The Acreage, FL, 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 - Junior ADU & Interior Conversion in The Acreage
Most projects finish in 6-10 weeks, with permit approval adding 2-3 weeks upfront. Palm Beach County’s inspection scheduling for The Acreage’s rural grid can add a few days if we hit end-of-week delays, which we avoid by booking early-week slots. Call (844) 665-0162 and we’ll outline a realistic timeline for your specific layout.
Yes. Because The Acreage is unincorporated, all permits pull through Palm Beach County, not a city office. A JADU requires building, electrical, plumbing, and mechanical permits, plus verification that your well and septic clearances still comply after any entrance or meter modifications. We handle the full submittal and coordinate with county plan checkers so you don’t navigate that alone.
Sometimes, if your chosen space already has a bathroom and you accept a wet-bar kitchenette positioned near existing drains. Most The Acreage homes from the 1985-2005 era weren’t laid out for this, so some plumbing extension is typical. During our free site visit, we’ll tell you honestly whether your existing layout can avoid major mechanical relocation or whether that’s a cost worth phasing.
The low end of our $45,000-$130,000 range applies when you keep the existing bathroom, use a wet-bar kitchenette near existing plumbing, avoid electrical service upgrades, and choose stock cabinetry with LVP flooring. Every structural modification, mechanical relocation, or material upgrade adds from there. We’ll show you exactly which decisions move your number during the estimate walkthrough.
We warranty our workmanship for one year, and every product we install carries its manufacturer warranty, from cabinetry to mini-splits to electrical panels. Because we work with name-brand products, not proprietary lines, your warranty stays with you even if you need service from another contractor years later. We document every model number and warranty registration in your closeout packet.
Get Your Free Estimate for Junior ADU & Interior Conversion in The Acreage
Call (844) 665-0162 to schedule a free on-site estimate. Raymond Estevez or a senior project lead will walk your space, verify your well and septic layout against county setback rules, and return a detailed written quote within 48 hours. We’ll show you exactly where your project sits in that $45,000-$130,000 range and what choices would move it. No pressure, no generic pitch - just specific answers for your property in The Acreage.
Written by Raymond Estevez, Owner at Groundwork Construction Co., serving The Acreage and Palm Beach County.