Fast, Reliable Home Additions & ADU Across Andover
Home additions and ADU construction in Andover typically run $45,000-$130,000 for room additions and $90,000-$220,000 for detached ADUs, with most projects requiring 8-16 weeks from permit to final inspection. We’re Groundwork Construction Co. of South Florida, and we build across Andover’s 33023 ZIP regularly - from garage conversions near Pembroke Road to sunroom additions off NW 15th Street. Because we operate out of Fort Lauderdale, our crews can be on-site in Andover within 30-40 minutes, which matters when you’re coordinating inspections or addressing a weather hold during South Broward’s wet season. Call us at (844) 665-0162 for a free estimate.
Why Groundwork Construction Co. of South Florida Is Andover’s Preferred Home Additions & ADU Company
We’ve been building in Andover long enough to know the difference between a 1958 CBS slab home and a 1972 split-level, and what each demands when you’re tying new construction to old walls. Our Home Additions & ADU team has worked on properties from the neighborhoods near Andover Park to the blocks west of 56th Avenue, and we’ve learned that Andover homeowners value specifics over sales pitches.
Our response time to Andover averages under 45 minutes for initial consultations, and we schedule build crews to minimize the back-and-forth that drags out projects. We pull permits through Broward County’s HVHZ office regularly, so we know which plans examiners will flag a roof-to-wall connection detail and which ones want to see your impact-rated window schedule upfront. That local fluency saves weeks.
Raymond Estevez, who leads Groundwork, has directed addition and ADU projects across South Florida for years. His insistence on “built to spec, not to convenience” means we don’t substitute materials mid-project because something’s easier to source. If your plans specify impact-rated Andersen windows with Florida Product Approval numbers for the HVHZ, that’s what arrives on the truck.
Our Home Additions & ADU Services in Andover
New Detached ADU
A detached ADU in Andover is one of the most complex residential builds you can undertake in ZIP 33023, and not just because of the footprint. The shallow water table - typically 2-5 feet below grade - means any ground-penetrating work demands engineered drainage that interior-state contractors routinely underestimate. We design ADU foundations with this in mind, specifying proper footings and French drain systems that keep water out of your new unit during our 60-65 inch annual rainfall. We also offer prefab ADU options through partners like Abodu, Dvele, Mighty Buildings, and Boxabl, which can compress the build timeline while still meeting Broward County’s HVHZ standards.
Room Additions
Adding a bedroom, family room, or master suite to an Andover home means tying into existing CBS walls that may lack hurricane clips or straps at the roof connection. On a 1960s CBS home near the intersection of NW 15th Street and 56th Avenue, our crew reinforced the roof-to-wall connections before framing a new sunroom addition, replacing non-rated windows with impact-rated units that carry the required Florida Product Approval numbers, and verifying drainage around the new footings given the shallow water table - so the project passed Broward County’s HVHZ inspection without a hitch. That’s the level of structural retrofit we build into every room addition quote.
Sunrooms & Enclosed Patios
Andover’s older homes - many with original terrazzo floors and low-slope roofs - are prime candidates for sunroom conversions, but the existing slab and roof structure need honest assessment. We don’t frame over a failing roofline or ignore the fact that your 1965 flat roof wasn’t designed to carry the load of a glass-enclosed space. Our sunroom builds include structural engineering for wind uplift, impact-rated glazing with proper HVHZ approval numbers, and tie-in details that don’t compromise your home’s existing envelope.
Garage Conversion ADU
Converting a garage to living space in Andover requires more than drywall and a mini-split. You’re changing the occupancy classification, which triggers full current-code compliance - including impact-rated openings, updated electrical, and often fire separation between the ADU and the main residence. We handle the permitting, the structural assessment, and the finish work, including cabinetry from KraftMaid or Wellborn and countertops from Cambria if you’re adding a kitchenette.
Junior ADU & Interior Conversion
For homeowners who don’t want exterior construction, a junior ADU within the existing footprint can add rental income or multigenerational space. We assess whether your current electrical service and HVAC can handle the load, and we navigate Broward County’s ADU ordinances to keep the project compliant.
ADU Design & Permitting
Our design process starts with a site survey that accounts for Andover’s specific constraints: setback requirements, the high water table, and HVHZ product approvals. We produce permit-ready plans that move through Broward County without the revision cycles that derail timelines.
ADU Site Prep & Utilities
Site work in Andover means managing water. We coordinate utility tie-ins and specify drainage systems that handle our concentrated wet-season rainfall, protecting your investment from day one.
Second Story Additions
Adding a second story to a 1950s-1970s CBS home requires structural analysis of the existing slab and walls. We engineer for the load, tie in hurricane-resistant connections, and specify materials - from James Hardie siding to impact-rated windows - that meet the HVHZ requirements governing this ZIP.
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 Andover
We work with 50+ recognized brands across every category we touch, which means Andover homeowners choose materials that match their budget and taste, not what’s convenient for our crew. For additions and ADUs, that might mean KraftMaid or Wellborn cabinetry in a kitchenette, Cambria quartz for a bathroom vanity, or James Hardie siding on a new exterior wall. Every product we specify for Andover carries the Miami-Dade or Florida Product Approval required for HVHZ construction - we don’t source materials approved elsewhere in the state that won’t pass local inspection. That brand breadth, combined with our single-source accountability, is why we say “you choose the brand, we handle the build.”
Common Home Additions & ADU Problems We See in Andover Homes
- Non-HVHZ windows and doors specified by out-of-county contractors. Materials approved in Orlando or Tampa often lack the Miami-Dade/Florida Product Approval numbers Broward County inspectors verify on-site. We see projects stalled mid-build when crews realize their window package won’t pass - a mistake that costs weeks and thousands in change orders.
- Missing hurricane clips and straps at roof-to-wall connections. Andover’s legacy CBS homes were built before modern strapping requirements. Tying new construction to walls without reinforcing these connections leaves the entire roof vulnerable to uplift during hurricane-force winds. We engineer this retrofit into every addition quote.
- Inadequate drainage for ground-penetrating work. The shallow water table across 33023 means footings and underground utilities sit in saturated soil for much of the year. Contractors who don’t plan for this face water intrusion, foundation settlement, and failed inspections. Our site prep includes engineered drainage specifications.
- Undersized electrical service for ADU loads. Many Andover homes still run on 100-amp panels installed in the 1960s. Adding a kitchenette, HVAC, and laundry to a garage conversion often requires a service upgrade that should be identified in design, not discovered during rough-in.
Pricing for Home Additions & ADU in Andover, FL
Here’s what homeowners in Andover can expect for addition and ADU work, based on current South Florida market conditions and the structural requirements of HVHZ construction:
| Project Type | Typical Range in Andover |
|---|---|
| Home Addition | $45,000-$130,000 |
| ADU Construction | $90,000-$220,000 |
| Garage Conversion | $30,000-$80,000 |
| Impact Window Installation (addition package) | $8,000-$25,000 |
| Roof Repair (tie-in work) | $400-$1,800 |
These ranges reflect the structural retrofits, HVHZ-rated materials, and drainage engineering that Andover’s conditions demand. A garage conversion on a 1960s slab with no existing hurricane strapping sits at a different price point than a newer home with compliant structure. We provide itemized quotes after site assessment - call (844) 665-0162 to schedule a free estimate with exact numbers for your property.
We Also Serve Cities Near Andover
Our crews build across South Broward regularly, including Home Additions & ADU in Andover and neighboring Miramar, West Park, Hollywood, and West Hollywood. The same HVHZ requirements, shallow water table conditions, and legacy housing stock apply throughout this corridor, so our local expertise travels with us.
Serving Andover, FL - Our Local Coverage Area
We’re based in the Andover 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 Andover
Because ZIP 33023 sits in Broward County’s High-Velocity Hurricane Zone, every opening in new construction must demonstrate resistance to wind-borne debris and pressure cycling through certified testing. Inspectors verify these approval numbers on-site, and materials without them fail inspection regardless of quality. We source Andersen, Pella, Marvin, and other brands with explicit HVHZ ratings so your project doesn’t stall. Call (844) 665-0162 to confirm your material package is compliant before we break ground.
Often yes, but only after structural verification. Andover’s slab-on-grade CBS homes from the 1950s-1970s typically carry terrazzo over a 4-inch slab that may or may not be reinforced for the additional load of a sunroom roof and glass walls. We assess the existing slab thickness, reinforcement, and soil conditions before specifying footings or slab augmentation. In some cases, piers or grade beams are necessary to prevent differential settlement. Schedule a free structural review at (844) 665-0162.
A non-impact-rated or improperly installed door in an HVHZ zone means your home has a breach point where wind pressure enters and seeks an exit, often lifting the roof from within. In Andover’s 33023 ZIP, where sustained winds can exceed 140 mph in a major storm, a single failed door can destroy the structure. We specify and install impact-rated doors with proper Florida Product Approval numbers, and we verify the frame anchoring meets current wind-load standards. Don’t wait for a storm warning to discover your opening isn’t rated - call (844) 665-0162 for an assessment.
Yes. Any garage conversion to habitable space in Broward County requires a building permit, and ADU classification triggers additional zoning and fire-separation reviews. The process includes plans exam, structural inspection, electrical rough-in, plumbing rough-in, and final inspection. We handle the full permit package and shepherd it through Broward County’s HVHZ office, where we’ve established working relationships with plans examiners. Call (844) 665-0162 to discuss your specific property and zoning.
Missing or incorrect hurricane clips and straps at the connection between existing CBS walls and new roof or wall framing. Broward County inspectors are trained to look for this specific detail on every addition, and legacy homes in Andover almost never have compliant connections from original construction. We build this retrofit into our standard scope, so our projects pass the first time. For a quote that includes proper structural tie-ins, call (844) 665-0162.
Ready to expand your Andover home? Whether you’re adding a rental unit, growing into a sunroom, or building up with a second story, we’ll engineer it for South Florida’s toughest conditions and walk you through every permit and product choice. Call (844) 665-0162 for a free, on-site estimate - no obligation, no pressure, just specific answers about your project.
Written by Raymond Estevez, Owner at Groundwork Construction Co., serving Andover and South Florida homeowners since our founding.