Fast, Reliable Home Additions & ADU Across Fort Lauderdale
Home additions and ADU construction in Fort Lauderdale typically run $45,000-$130,000 for room additions and $90,000-$220,000 for detached ADUs, with most projects requiring 4-8 months from permit to completion. We’re Groundwork Construction Co. of South Florida, and we build across Fort Lauderdale’s distinct neighborhoods - from the historic CBS homes of Victoria Park to the canal-front properties near The Landings. Our Home Additions & ADU team understands the local conditions that make or break these projects: the 12-18 inch groundwater table, the High Velocity Hurricane Zone product approvals, and the dual permitting maze for water-adjacent builds. Call (844) 665-0162 for a free estimate - we serve all Fort Lauderdale ZIP codes including 33301, 33309, 33312, and 33317.
Why Groundwork Construction Co. of South Florida Is Fort Lauderdale’s Preferred Home Additions & ADU Company
We’ve worked in Fort Lauderdale long enough to know that a contractor who treats this city like anywhere else in Florida will cost you months and money you didn’t budget. Our team, led by Raymond Estevez, has built ADUs and additions in Victoria Park, Plantation Park, and along the finger islands where North Fort Lauderdale Beach Boulevard meets the water. We don’t juggle you between subcontractors - one contractor, every phase, from foundation to finish.
Fort Lauderdale homeowners choose us because we bring material options they actually want. You choose the brand, we handle the build. That means KraftMaid or Wellborn cabinetry for your junior ADU kitchenette, Cambria countertops if you’re renting the unit and need durability, and James Hardie siding that meets the NOA requirements Broward County demands. Our customers in Las Olas and Poinsettia Heights regularly mention that other contractors offered them one product line and called it a day.
We respond to Fort Lauderdale inquiries within one business day, and we schedule site visits across the city within 48 hours. That’s not a gimmick - it’s necessary when you’re dealing with seawall inspections, FEMA elevation certificates, and the City of Fort Lauderdale’s building department backlog. We’ve seen too many projects stall because the contractor didn’t understand that “Fort Lauderdale” means different rules than Plantation or Lauderhill.
Our Home Additions & ADU Services in Fort Lauderdale
ADU Design & Permitting
Fort Lauderdale’s ADU permitting process is layered. The city allows detached units up to 800 square feet in most single-family zones, but you still need to clear zoning verification, tree protection plans if you’re on a site with grandfathered oaks, and flood-plain documentation tied to your FEMA flood zone. We handle the full design-permit-build sequence in-house. For canal-front properties, we flag the Army Corps requirement before you buy plans that won’t get approved. In Victoria Park, we recently shepherded a 1960s CBS property through the process - the original structure sat in AE flood zone with a base flood elevation of 8 feet, so we designed the ADU slab at 10.5 feet to meet current FEMA standards and protect the owner’s future insurability.
Garage Conversion ADU
This is where Fort Lauderdale’s housing stock gets interesting. The dominant 1950s-1970s CBS construction means thousands of homes have detached or attached garages built for a different era. In Plantation Park, we converted a detached 1962 CBS garage into a 450 sq ft ADU. The original 12-foot-wide, one-piece tilt-up door had a 1970s-era opener past its service life, and the track was welded to the old steel frame. We needed to source custom-size impact-rated sliders for the new garage conversion, which took extra permitting time under the High Velocity Hurricane Zone rules, but the finished unit now meets FEMA flood elevation and gives the homeowners a rentable space above the canal flood zone. Garage conversion ADU projects in Fort Lauderdale typically run $30,000-$80,000 depending on whether you’re keeping the slab, upgrading electrical from 100 to 200 amp, and adding a kitchenette and full bath.
New Detached ADU
Building new gives you options that retrofits don’t. For Fort Lauderdale homeowners who want speed, we partner with prefab innovators - Abodu, Dvele, Mighty Buildings, and Boxabl - that deliver units engineered for Florida’s wind and flood codes. For custom builds, we stick-frame on your site with traditional methods. The catch in Fort Lauderdale is always the site. New detached ADUs need proper dewatering during foundation work - the groundwater table sits 12-18 inches below grade, so any excavation requires active pumping. Skip this in your budget and you’ll add 15-25% in surprise costs. We price dewatering explicitly, not as a “if needed” footnote.
Junior ADU & Interior Conversion
Junior ADUs - units created within the existing footprint, typically 500 square feet or less - make sense in Fort Lauderdale’s tighter lots where setback rules prevent detached construction. We convert underutilized spaces: attached garages, large master wings, or the second floors of split-level CBS homes common in neighborhoods near William J Kelly Park. The work involves separating utilities, adding egress windows that meet HVHZ impact requirements, and often upgrading the home’s electrical panel. Original 1950s-70s panels in Fort Lauderdale are frequently 100 amp with fused disconnects - inadequate for a second kitchen and HVAC load. We handle the service upgrade as part of the scope, not as a change order surprise.
ADU Site Prep & Utilities
Site prep in Fort Lauderdale is where out-of-market contractors stumble. We handle dewatering, soil compaction for the elevated slab, sewer lateral extensions, and electrical service upgrades. For properties near Pan-American State Park and other low-lying areas, we coordinate with the city’s stormwater division on pump station tie-ins. Flood-mitigation construction isn’t an upgrade here - it’s standard. We build to spec, not to convenience, and that means your ADU site prep includes elevation certificates, proper fill, and drainage that accounts for tidal influence, not just rainfall.
What happens when you call
- 1
A real person answersNo phone trees - you reach a local pro.
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You get an upfront price rangeHonest numbers before anyone is dispatched.
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A background-checked tech heads outLicensed & insured, dispatched right away.
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You approve before work beginsNothing starts until you say go.
Trusted Brands We Service in Fort Lauderdale
We work with 50+ recognized industry brands across every category, which matters more in Fort Lauderdale than you might think. The High Velocity Hurricane Zone designation means your windows, doors, and roofing materials need Miami-Dade Notices of Acceptance - and not every brand’s full catalog qualifies. We stock and specify Andersen, Pella, Marvin, Milgard, Jeld-Wen, Simonton, PGT, and CGI window and door lines that carry the right NOA documentation. For cabinetry in ADU kitchenettes, we offer KraftMaid and Wellborn across multiple price tiers. Countertops draw from Cambria, Silestone, and Caesarstone - three of the most recognized engineered quartz brands in residential construction. You choose the brand, we handle the build. That flexibility is especially valuable in Fort Lauderdale’s two-tier market, where a rental ADU near Las Olas has different finish expectations than a family addition in Plantation Park.
Common Home Additions & ADU Problems We See in Fort Lauderdale Homes
- Underestimating dewatering costs. The water table sits 12-18 inches below grade across much of Fort Lauderdale, so any ADU foundation or utility trench requires active pumping. A cost that can blow a budget by 15-25% if unplanned. We build this into every estimate for below-grade work.
- Assuming standard door sizes for legacy one-piece or early sectional doors. In 1950s-70s CBS homes, these custom openings often need reframing, which adds unexpected structural and cost layers. That “simple” garage conversion ADU becomes a framing project when the 12-foot tilt-up won’t accept modern hardware.
- Missing dual permitting for canal-front ADUs. Work waterward of the seawall needs both City of Fort Lauderdale and U.S. Army Corps of Engineers approval, adding 3-6 months that can derail a project timeline. We’ve rescued projects from out-of-market contractors who never saw this coming.
- Specifying non-HVHZ windows and doors. Broward County’s High Velocity Hurricane Zone requires Miami-Dade NOA products. Standard Florida building code windows won’t pass inspection. We verify every specification against the approved product list before ordering.
Pricing for Home Additions & ADU in Fort Lauderdale, FL
Honest numbers for Fort Lauderdale’s market:
| Project Type | Typical Range in Fort Lauderdale |
|---|---|
| Garage Conversion ADU | $30,000 - $80,000 |
| Home Addition | $45,000 - $130,000 |
| Window Replacement (HVHZ-rated) | $4,500 - $15,000 |
What moves you within these ranges? Foundation type - slab-on-grade versus elevated pile or stem wall. Finish level - rental-grade versus owner-occupied. And the Fort Lauderdale variables: dewatering duration, FEMA elevation requirements, and whether you’re in a canal-front zone triggering Army Corps review. A garage conversion on an existing slab in Plantation Park runs very different from a new detached ADU on finger-island fill near Seabreeze Boulevard. We provide line-item estimates, not lump-sum guesses. Call (844) 665-0162 for your free estimate - we’ll walk your site and flag the conditions that affect your specific number.
We Also Serve Cities Near Fort Lauderdale
Our Home Additions & ADU in Fort Lauderdale crew also builds across Plantation, Broadview Park, Lauderhill, and Lauderdale Lakes. Each city has its own building department rhythms and flood zone maps, and we know them. Whether you’re in 33317 near the Lauderhill border or on the Plantation side of the line, we bring the same single-source accountability and brand flexibility.
Serving Fort Lauderdale, FL - Our Local Coverage Area
We’re based in the Fort Lauderdale 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 Fort Lauderdale
The three biggest challenges are electrical service capacity, custom door and window openings, and flood elevation compliance. Most 1960s CBS homes in Fort Lauderdale still run 100-amp panels with fused disconnects - inadequate for a second dwelling unit. Original garage door openings often used one-piece tilt-up doors with welded steel frames that don’t accept modern sectional hardware without reframing. And FEMA’s updated flood maps have raised base flood elevations in many neighborhoods, meaning new ADU slabs must sit higher than the original house. Call (844) 665-0162 and we’ll assess your specific property - estimates are free.
Yes, if any construction activity occurs waterward of your seawall line, including pilings, docks, or utility lines running under the canal right-of-way. This dual permitting through both the City of Fort Lauderdale and the Army Corps typically adds three to six months to your timeline. We identify this requirement during our initial site visit and handle both applications in parallel where possible. Call (844) 665-0162 to schedule - we’ll flag your seawall status before you commit to a design.
You can, but the door itself is usually the first thing that has to go. Vintage one-piece tilt-up doors from the 1960s and 70s - common brands like Overhead Door or Stanley - have scarce parts availability and don’t meet current HVHZ wind-load requirements. The opening itself may be non-standard width or height, requiring reframing to accept modern impact-rated sliders or sectional doors. We source custom-size products when needed and handle the structural modifications as part of the conversion scope. Call (844) 665-0162 for an exact assessment of your garage.
FEMA requirements depend on your specific flood zone designation, which varies block by block in Fort Lauderdale. Properties in AE zones typically require finished floor elevation at or above the base flood elevation plus one foot of freeboard - commonly 9-11 feet NAVD88 in many Fort Lauderdale neighborhoods. New construction must also include elevation certificates filed with the city. We pull FIRM panels and coordinate with surveyors during design so your ADU meets current standards, not the standards from when your main house was built. Call (844) 665-0162 and we’ll verify your zone.
A standard detached ADU in Fort Lauderdale takes 6-10 months from signed contract to certificate of occupancy. Zoning verification and design: 4-6 weeks. City permitting: 8-12 weeks, longer if Army Corps coordination is needed for canal-front sites. Construction: 14-20 weeks depending on foundation type and finish complexity. Prefab options from our partners - Abodu, Dvele, Mighty Buildings, or Boxabl - can compress the construction phase by 30-40% since units arrive partially finished. Call (844) 665-0162 to discuss which path fits your property and timeline.
Ready to expand what’s possible on your Fort Lauderdale property? Whether you’re converting a 1960s garage in Victoria Park, building new on a canal-front lot, or adding a junior ADU within your existing footprint, Groundwork Construction Co. handles every phase - design, permitting, construction, and finish - under one accountable team. No contractor juggling. No mystery materials. Just built to spec, not to convenience. Call Raymond Estevez and our team at (844) 665-0162 for your free, line-item estimate.
Written by Raymond Estevez, Owner at Groundwork Construction Co. of South Florida, serving Fort Lauderdale and Broward County homeowners.