Garage Conversion ADU in Deerfield Beach: Scope, Timeline, and What You’ll Pay
A garage conversion ADU turns your existing garage into a permitted, livable accessory dwelling unit with its own Kitchen Design & Layout in Deerfield Beach, bath, sleeping area, and separate entrance. In Deerfield Beach, most conversions we handle run 10 to 16 weeks from permit pull to final inspection, with costs typically falling between $30,000 and $80,000 depending on whether you’re working with a finished garage or starting from bare block walls. Call (844) 665-0162 and we’ll walk your specific space, same week.
How We Convert a Garage to an ADU, Start to Finish
Every Home Additions & ADU - Deerfield Beach project follows five distinct stages. Here’s what happens, how long each takes, and what you’ll need to decide.
Stage 1: Site Evaluation and Feasibility (Week 1)
We measure your garage footprint, check ceiling height against Broward County’s minimum clearance requirements, and verify whether your existing slab can support a full kitchen without structural modification. You’ll decide at this stage whether you want a studio layout or a one-bedroom configuration with a partial wall. We also pull your property’s survey to confirm setback compliance and identify any easements that could limit the ADU’s placement of utilities.
Stage 2: Design, Permitting, and Product Selection (Weeks 2-5)
Our team drafts plans that meet Deerfield Beach’s zoning and Florida’s HVHZ wind codes, then submits to Broward County’s Building Code Services. This is where you choose your materials: flooring type, cabinetry line, countertop surface, window and door ratings, and whether you’ll add a mini-split system or extend your main HVAC. Permit review in Broward typically takes 3 to 4 weeks for ADU conversions, longer if coastal CCCL jurisdiction applies to your property.
Stage 3: Demolition and Rough Construction (Weeks 6-9)
We strip the garage to its shell, install any required structural headers for new window and door openings, and run new electrical, plumbing, and HVAC lines. If your garage slab lacks the vapor barrier or insulation needed for living space, we may need to pour a new floating floor or apply a sealed topping slab. You’ll sign off on rough-in placements before we close walls.
Stage 4: Insulation, Drywall, and Finish Installation (Weeks 10-13)
We install HVHZ-compliant impact-rated windows and exterior doors, hang and finish drywall, lay flooring, and set cabinets, counters, and fixtures. Your tile, backsplash, and paint selections get locked in here. We coordinate inspections for insulation, drywall, and mechanical systems before moving to final finishes.
Stage 5: Final Inspection and Certificate of Occupancy (Weeks 14-16)
Broward County conducts final inspection for code compliance, fire separation, and egress requirements. Once passed, we turn over keys and warranty documentation. You’ll have a fully permitted, rentable or family-usable ADU with its own address for utility metering if desired.
The Options You’ll Choose Between for Your Garage Conversion ADU
No two garage conversion ADU projects in Deerfield Beach use the same spec sheet. Here are the real decisions that shape your build and your budget.
- Studio vs. one-bedroom layout: A studio keeps your open garage footprint with a kitchenette and bath, typically 350-450 square feet. A one-bedroom adds a framed partition and closet, pushing toward 500-600 square feet but requiring more structural modification and HVAC capacity. Studios suit rental income; one-bedrooms work better for aging parents or adult children.
- Flooring: Luxury vinyl plank runs $4-$8 per square foot installed, handles humidity well, and installs fast over existing slabs. Porcelain tile at $7-$14 per square foot lasts longer and reads more premium, but adds weight and requires a level substrate. We don’t recommend carpet in coastal Deerfield Beach garages due to moisture wicking through older slabs.
- Kitchenette vs. full kitchen: A compact kitchenette with a two-burner cooktop, under-counter fridge, and single-bowl sink keeps costs down and fits most garage dimensions. A full kitchen with standard appliances, dishwasher, and full cabinetry run requires more electrical service and square footage, adding $4,000-$8,000 to the project.
- HVAC approach: A dedicated mini-split system ($2,500-$5,000 installed) gives your ADU independent climate control and avoids overloading your main home’s system. Extending existing ductwork only works if your current unit has sufficient capacity, which we verify during feasibility.
- Exterior finish and door: Since your converted garage will have a new primary entrance, you’ll select an impact-rated door assembly that meets HVHZ standards. Options range from a standard fiberglass door with sidelite ($1,200-$2,200) to a full architectural-grade entry with transom ($3,500-$6,000). We source from Andersen, Pella, and Jeld-Wen lines that carry Miami-Dade NOA approval.
What Garage Conversion ADU Costs in Deerfield Beach, FL
Garage conversion ADU projects in Deerfield Beach typically range from $30,000 to $80,000. Here’s what pushes a job toward the low or high end of that span.
| Cost Factor | Low-End Impact | High-End Impact |
|---|---|---|
| Existing garage condition | Finished interior, working electrical, intact slab | Unfinished block walls, no power, cracked or uninsulated slab |
| Plumbing relocation | Bath and kitchen on same wall as main house | Opposite corner from existing lines, requiring trenching |
| Structural modification | No header changes, standard door/window cuts | Widening garage door opening into living entry, adding windows |
| Material grade | Stock cabinetry, LVP flooring, standard fixtures | Custom KraftMaid or Wellborn cabinetry, tile, premium fixtures |
| Permit scope and inspections | Standard conversion, no coastal jurisdiction | CCCL overlay, HOA architectural review, additional trade inspections |
Your written estimate includes all labor, materials, permits, and inspections for the scope we define together. It does not include your own selections that change mid-project, separate utility connection fees from FPL or Broward County Water, or any HOA application fees if you live in a deed-restricted community.
Call (844) 665-0162 for an exact quote on your garage - estimates are free.
What Deerfield Beach Homes Specifically Do to This Job
Deerfield Beach sits entirely within Broward County’s High Velocity Hurricane Zone, and that changes everything about a garage conversion ADU here. Every window, exterior door, and roof penetration must carry Miami-Dade NOA or Florida Product Approval documentation that contractors working just across the county line in Boca Raton never need to produce for an Iron Fence - Deerfield Beach or similar project. We’ve seen out-of-area crews submit standard PGT or CGI products for Deerfield Beach permits only to get rejected at plan review, adding weeks to timelines that were already tight.
The housing stock we most often convert in Deerfield Beach dates from the 1960s through 1980s: concrete block construction in neighborhoods like Century Village and along the beachside corridor of 33441. These garages were built before post-Andrew HVHZ upgrades, which means we regularly find original steel hurricane straps corroded through at the masonry embedment point, especially where salt-laden Atlantic air has accelerated rust. What starts as a straightforward garage conversion ADU can trigger a structural strap-replacement requirement under current inspection protocols, something we flag during feasibility so you’re not surprised at rough inspection.
If your property sits seaward of Florida’s Coastal Construction Control Line, a separate state permit layer applies through the Department of Environmental Protection. That adds 2 to 4 weeks to permitting and requires elevation documentation that inland Deerfield Beach properties skip. We handle both tracks, but it’s a variable we verify before we quote.
Many homeowners doing a garage conversion ADU in Deerfield Beach pair the interior work with upgraded finishes elsewhere in the home. You might consider Cabinets & Countertops in Deerfield Beach for a matching kitchen renovation, or Backsplash, Tile & Flooring in Deerfield Beach to coordinate your ADU’s surfaces with the main house. Since Groundwork handles every phase under one contractor, your project stays coordinated without the gaps that come from juggling separate trades.
Serving Deerfield Beach, FL - Our Local Coverage Area
We’re based in the Deerfield Beach area and offer Home Additions & ADU services to this community we know 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 Deerfield Beach
Most garage conversion ADU projects take 10 to 16 weeks from permit approval to certificate of occupancy. Broward County’s permit review adds 3 to 4 weeks before construction starts, and coastal CCCL properties add another 2 to 4 weeks. Call (844) 665-0162 and we’ll confirm your specific timeline after a site visit.
Yes, absolutely. Any garage conversion ADU in Deerfield Beach requires a full building permit from Broward County, plus electrical, plumbing, and mechanical permits. The project must also meet Florida’s HVHZ product approval standards for all exterior openings. Unpermitted conversions cannot be legally rented and will fail at resale inspection.
Sometimes, but rarely without any modification. Most Deerfield Beach garages have minimal electrical service and no plumbing, so you’ll need at least new circuits for kitchen and bath loads and new water/sewer lines. If your garage shares a wall with your kitchen or main bath, we can often minimize trenching and keep costs down.
Typically yes. A garage conversion ADU in Deerfield Beach runs $30,000-$80,000, while a detached ADU starts around $90,000 and can exceed $220,000. You’re leveraging existing foundation, walls, and roof structure rather than building from scratch. The trade-off is square footage and layout constraints versus a custom new build.
Groundwork warrants our workmanship on every garage conversion ADU, and the materials you select carry their own manufacturer warranties. KraftMaid and Wellborn cabinetry, for example, include limited lifetime warranties. Cambria countertops carry a full lifetime warranty. We document all warranty terms in your closeout packet so you have clear recourse on every component.
Get a Free On-Site Estimate for Your Garage Conversion ADU
We’ll walk your garage, check feasibility against Deerfield Beach’s HVHZ and zoning requirements, and deliver a written estimate with real numbers. No pressure, no generic ranges. Call (844) 665-0162 or reach out through our site to schedule. Most Deerfield Beach homeowners hear back within one business day.
Written by Raymond Estevez, Owner at Groundwork Construction Co., serving Deerfield Beach and South Florida.