Fast, Reliable Home Additions & ADU Across Kendall
Home additions and ADU construction in Kendall typically run $45,000-$220,000 depending on scope, with most projects taking 4-8 months from permit to final inspection. We’re Groundwork Construction Co. of South Florida, and our crews know Kendall’s building landscape inside out - from the pre-Andrew concrete-block homes near Dadeland to the newer subdivisions west of the Turnpike. Because we’re based in Fort Lauderdale, we can have a project manager on-site in Kendall within 24 hours of your call. That local responsiveness matters here, where Miami-Dade County’s High Velocity Hurricane Zone rules add layers of permitting complexity you won’t find in Broward. Call (844) 665-0162 for a free estimate.
Why Groundwork Construction Co. of South Florida Is Kendall’s Preferred Home Additions & ADU Company
Kendall homeowners don’t have patience for contractors who learn the HVHZ rules on the job. We’ve built our reputation here by showing up prepared - with supplier relationships already in place for Miami-Dade NOA-approved materials and crews who’ve handled limestone excavation on dozens of South Florida sites.
Our reviews from Kendall customers consistently mention one thing: we don’t hand projects off. Your project manager stays with you from the first site visit through final inspection. Same person, same phone number, same accountability.
Response time to Kendall averages same-day or next-day for initial consultations, and we schedule work to dodge the wet-season afternoon thunderstorms that can shut down concrete pours and roofing work for days at a stretch. We know which weeks in June through October are actually workable, and we price that knowledge into realistic timelines rather than promising speeds we can’t deliver.
We also understand the split personality of Kendall’s housing stock. Homes built before 1992 often carry hidden scars from Hurricane Andrew - hasty patch repairs, non-compliant tie-down hardware, mixed-quality roofing assemblies that passed visual inspection but never met current code. We spot these issues before they become change orders.
Our Home Additions & ADU Services in Kendall
ADU Design & Permitting
Every ADU in unincorporated Kendall hits the Miami-Dade NOA requirement before a single board gets cut. We handle the full design and permitting package, including product submittals that prove every window, door, roofing fastener, and structural connector carries an active NOA number on file with the county. Our Home Additions & ADU team maintains standing relationships with HVHZ-approved suppliers - not big-box stores - so we don’t waste weeks swapping out non-compliant products after permit review. A typical detached ADU permit package in Kendall takes 8-12 weeks, and we front-load the NOA verification to keep that timeline intact.
Garage Conversion ADU
Kendall’s 1970s-1980s homes often have attached garages or carports that make natural conversion candidates, especially near the 33156 zip. But here’s the catch: many pre-Andrew structures lack the continuous load path and wind retrofit straps that current code demands. We assess the existing roof-to-wall connections, the garage slab’s capacity for kitchen and bath loads, and whether the conversion triggers full HVHZ compliance across the entire structure. Garage conversion ADUs in Kendall typically cost $30,000-$80,000, with the lower end applying when the existing slab and roof frame can be preserved and the higher end requiring structural reinforcement and full re-roofing with NOA-approved materials.
New Detached ADU
A new detached ADU gives you maximum flexibility - rental income, multigenerational living, home office - but in Kendall it also means confronting the Miami Limestone formation head-on. On a recent project near Kendall’s 33156, our crew excavated footings for a new detached unit and hit solid oolitic limestone at just 10 inches below grade, forcing a switch to a rock-removal subcontractor. We also had to source an NOA-approved impact window package from a Miami-Dade-listed supplier because the big-box frames we initially priced were not compliant, adding a week to the schedule but keeping the inspector satisfied. We budget for both contingencies upfront now. New detached ADU construction in Kendall runs $90,000-$220,000 depending on size, finishes, and site conditions.
Junior ADU & Interior Conversion
For homeowners who don’t want to build outward, a Junior ADU - a self-contained unit within the existing footprint - can sidestep some excavation headaches. We focus these conversions on Kendall’s larger ranch-style and split-plan homes, carving out separate entrances, kitchenettes, and bath facilities while maintaining the primary dwelling’s egress and fire separation. The HVHZ rules still apply to any new windows or exterior doors, and we verify NOA compliance for every product before installation.
Room Additions
Single-room additions - master suites, expanded kitchens, home offices - are the most common expansion request we get from Kendall homeowners. We design these to blend with the existing roofline and structural system, which in pre-1992 homes often means upgrading the original tie-down hardware to current standards. Room additions in Kendall typically fall in the $45,000-$130,000 range, with foundation work driving the lower or upper end depending on limestone depth and drainage conditions.
What happens when you call
- 1
A real person answersNo phone trees - you reach a local pro.
- 2
You get an upfront price rangeHonest numbers before anyone is dispatched.
- 3
A background-checked tech heads outLicensed & insured, dispatched right away.
- 4
You approve before work beginsNothing starts until you say go.
Trusted Brands We Service in Kendall
Groundwork works with 50+ recognized industry brands across every category of residential construction, and for Kendall’s HVHZ environment, that brand roster becomes a compliance advantage. Our ADU and home addition projects include access to prefab innovators - Mighty Buildings, Dvele, Boxabl, and Plant Prefab - alongside traditional stick-built construction, giving you flexible build paths that still meet Miami-Dade’s strict product approvals. For windows and doors, we draw from Andersen, Pella, Marvin, Milgard, Jeld-Wen, Simonton, PGT, and CGI, selecting only the impact-rated SKUs that carry active NOA numbers. You choose the brand and product line that fits your budget and aesthetic; we handle the build and the compliance documentation. That’s the “you choose the brand, we handle the build” approach that separates us from contractors who lock you into single-vendor convenience.
Common Home Additions & ADU Problems We See in Kendall Homes
- Hidden pre-Andrew structural shortcuts. Contractors assume the older concrete-block homes from the 1970s have beefed-up tie-downs, but many lack post-Andrew retrofit straps. The new addition’s roof can separate from the existing structure in a wind event if we don’t upgrade that connection during construction.
- Shallow limestone surprises. Western Kendall’s oolitic limestone sits just 6-18 inches below grade on many parcels. Excavation for a slab-on-grade addition runs up costs unexpectedly if the crew didn’t budget for rock removal equipment and disposal.
- Non-NOA product rejections. Selecting windows or doors not on the Miami-Dade NOA list leads to permit rejections and delays, forcing last-minute swaps to hurricane-approved products at higher prices. We verify every product’s NOA status before it hits the truck.
- Wet-season scheduling failures. Kendall’s June-October afternoon thunderstorms can ruin fresh concrete pours and leave roofing substrates exposed. Inexperienced crews from outside the area often book tight schedules that collapse with every weather delay.
Pricing for Home Additions & ADU in Kendall, FL
Here’s what Kendall homeowners can expect for typical project types. These ranges reflect Miami-Dade’s HVHZ compliance costs, limestone excavation contingencies, and the premium for NOA-approved materials:
| Project Type | Typical Range in Kendall |
|---|---|
| ADU Construction | $90,000-$220,000 |
| Home Addition | $45,000-$130,000 |
| Garage Conversion | $30,000-$80,000 |
| Impact Window Installation | $8,000-$25,000 |
What moves you within these ranges? Size and finish level are obvious factors, but in Kendall, the hidden drivers are foundation conditions (limestone depth), structural retrofit requirements for pre-1992 homes, and whether your product selections are already NOA-listed or require special sourcing. We provide itemized estimates that break out these line items so you see where your money goes. Call (844) 665-0162 for a free, on-site estimate - no obligation, and we’ll flag any likely surprises during that first visit.
We Also Serve Cities Near Kendall
Our crews regularly work across Miami-Dade County and into southern Broward. If you’re in Kendall or nearby Pinecrest, Glenvar Heights, South Miami, or Cutler, we can typically schedule your initial consultation within 24-48 hours. The same HVHZ expertise and limestone experience applies throughout this corridor.
Serving Kendall, FL - Our Local Coverage Area
We’re based in the Kendall area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
FAQs - Home Additions & ADU in Kendall
Every structural component and roofing product in a Kendall ADU must carry an active Miami-Dade Notice of Acceptance (NOA) number because the entire area sits in the High Velocity Hurricane Zone. This adds 2-4 weeks to material procurement compared to non-HVHZ markets, since we can’t source from standard big-box inventory and must verify NOA status before submittal. We build this verification into our pre-construction phase so it doesn’t delay the build itself. Call (844) 665-0162 and we’ll walk you through the specific NOA requirements for your project type.
Yes, carport conversions are common in Kendall’s older neighborhoods, but most pre-1992 structures need upgraded roof-to-wall tie-down straps, continuous load path connections, and impact-rated openings to meet current HVHZ standards. We assess the existing slab capacity, roof structure, and wall framing during our first site visit. The retrofit scope typically adds $8,000-$15,000 to a standard garage conversion. Call (844) 665-0162 for a free assessment of your specific structure.
Second-story additions in Kendall often require underpinning or supplemental footings to handle the increased load, and shallow limestone can complicate that work significantly. On some sites, we can use helical piers or micro-piles to avoid full rock excavation; on others, we need to bring in specialized breaking equipment. We test-bore during the estimate phase so you’re not surprised by a change order later. The foundation work for a second-story addition typically represents 15-25% of total project cost in Kendall. Call (844) 665-0162 to schedule a site evaluation.
We conduct a structural assessment that examines roof truss connections, wall-to-foundation ties, and the condition of any repairs made during the 1992-1994 rebuilding period. Homes with visible patchwork - mismatched roofing, non-original siding, or added rooms from that era - get extra scrutiny. If we find substandard work, we specify upgrades as part of the addition package rather than discovering problems mid-construction. This assessment is included in our free estimate. Call (844) 665-0162 to book yours.
Kendall’s poolside ADUs must comply with Miami-Dade’s 10-foot rear and side setbacks plus the county’s strict pool enclosure and barrier codes, which are more restrictive than many Florida jurisdictions. All glazing within the HVHZ must be impact-rated and NOA-listed, including any windows or doors facing the pool area. We coordinate with the county’s pool division and building department simultaneously to avoid conflicting approvals. Poolside ADUs typically cost $110,000-$220,000 in Kendall due to these coordination and material requirements. Call (844) 665-0162 for a detailed estimate.
Written by Raymond Estevez, Owner at Groundwork Construction Co. of South Florida, serving Kendall and Miami-Dade County homeowners with full-scope residential construction since our founding.