Fast, Reliable Home Additions & ADU Across Boca Del Mar
Home additions and ADU construction in Boca Del Mar run $45,000-$130,000 for room additions and $90,000-$220,000 for detached ADUs, with most projects requiring 10-16 weeks from permit to final inspection. Because Boca Del Mar sits in unincorporated Palm Beach County, every permit must be filed with the county’s Building Division, not Boca Raton’s department. Contractors who miss this jurisdictional split cost homeowners weeks in delays.
We’re Groundwork Construction Co. of South Florida, and our Home Additions & ADU team knows the route to the Palm Beach County permitting office by heart. From Lake Ida Drive to the neighborhoods near Sandalfoot Cove, we respond to Boca Del Mar inquiries within 24 hours and typically start site evaluations within 48-72 hours. Call (844) 665-0162 for a free estimate.
Why Groundwork Construction Co. of South Florida Is Boca Del Mar’s Preferred Home Additions & ADU Company
We’ve worked on enough 1970s and 1980s concrete-block homes in Boca Del Mar to know the rhythm of these projects. The original flat roofs, the single-pane aluminum sliders, the electrical panels that predate modern load requirements. Our crew doesn’t guess at what’s behind the stucco.
Our reputation here is built on passing inspections the first time. That means pulling permits with the correct authority, Palm Beach County, and specifying impact-rated openings before the inspector ever sets foot on the job. Homeowners in Boca Del Mar have left us strong reviews specifically citing our handling of the county’s wind-load codes and our transparency about what those codes add to the budget.
Response time matters when you’re living through construction. We route project managers from our Fort Lauderdale base to Boca Del Mar daily, so site visits and material deliveries don’t lag. Most Boca Del Mar clients get their first detailed estimate within a week of initial contact.
Raymond Estevez, our owner, personally reviews every addition and ADU estimate before it goes out. That second set of eyes catches the county-specific requirements that trip up less experienced contractors.
Our Home Additions & ADU Services in Boca Del Mar
ADU Design & Permitting
Every ADU in Boca Del Mar starts with a permit package filed through Palm Beach County’s Building Division, not Boca Raton. We handle the full architectural drawings, structural calculations for wind loads, and impact-glazing schedules. The county’s high-velocity hurricane zone designation means no shortcuts on opening protection. Our design team specs windows from Andersen, Pella, or PGT’s impact-rated lines, and we model the drainage plan around that shallow water table from day one.
Garage Conversion ADU
Garage conversions are the most common ADU type we build in Boca Del Mar, and they’re never simple cut-and-dry jobs. The original garage opening in these 1970s-80s CBS homes was never engineered for living space. We brace the opening against storm surge, replace the overhead door with a rated wall system or impact-rated slider, and upgrade the electrical service to handle kitchen and bath loads. On a 1979 CBS home on Lake Ida Drive, our crew first had to brace the un-reinforced garage opening against storm surge and replace the original single-pane aluminum slider with a wind-rated impact unit. Because the permit was pulled with the county, we also had to raise the equipment pad and re-grade the rear drainage to clear the 3-foot water table before the new ADU’s bath could pass inspection.
New Detached ADU
Detached units give you the most flexibility for rental income or multigenerational living, but they also face the strictest scrutiny in Boca Del Mar. Palm Beach County requires full structural engineering for wind uplift on any detached structure, and the shallow water table, often 2-4 feet below grade, demands specialized slab prep with engineered fill and moisture barriers. We partner with prefab innovators like Abodu, Dvele, Mighty Buildings, and Boxabl for clients who want faster timelines, or we stick-build to spec with traditional CBS construction when the site or design demands it.
Junior ADU & Interior Conversion
Junior ADUs convert existing interior space, attached garages, or storage areas into independent living units without expanding the home’s footprint. In Boca Del Mar’s older homes, these projects almost always trigger electrical panel upgrades and HVAC zoning changes. We handle the mechanical, plumbing, and structural work in-house, so you’re not coordinating three separate trades. Every new bedroom or living space must meet current egress and impact-protection standards, even when the original windows didn’t.
ADU Site Prep & Utilities
Site prep in Boca Del Mar means dealing with that water table before the first wall goes up. We bring in geotechnical recommendations for slab design, install French drains or sump systems where needed, and coordinate utility separations for metered ADUs. The county inspects drainage as a standalone phase, so we don’t pour concrete until the re-grade passes.
Room Additions & Second Story Additions
Single-story room additions in Boca Del Mar typically tie into the existing CBS structure with reinforced block and poured-cell connections. Second-story additions require structural analysis of the original footings, most of which weren’t sized for vertical expansion. We engineer beam pockets, column pads, and tie-downs to current Palm Beach County standards, not the 1978 code that built the house.
Sunrooms & Enclosed Patios
Enclosing a patio or building a sunroom sounds straightforward until the inspector asks for the impact-rating certificate on that sliding glass door. In Boca Del Mar, any new or replaced window or door in a sunroom must be HVHZ-compliant or paired with code-approved shutters. We spec Milgard, Simonton, or CGI impact-rated sliders and build the header support to match.
What happens when you call
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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 Boca Del Mar
We don’t lock Boca Del Mar homeowners into proprietary products. You choose the brand, we handle the build. For cabinetry in ADU kitchens, we work with KraftMaid and Wellborn across multiple price tiers. Countertops run Cambria, Silestone, or Caesarstone, depending on your tolerance for maintenance and your design direction. Exterior cladding on additions frequently specifies James Hardie fiber-cement for its wind-load performance and long warranty in salt-air environments. Because we maintain relationships with 50+ recognized brands, we source materials without the delays that plague single-vendor contractors.
Common Home Additions & ADU Problems We See in Boca Del Mar Homes
- Permits filed with the wrong authority. Contractors unfamiliar with Boca Del Mar’s unincorporated status routinely submit to Boca Raton’s building department. The application gets rejected, the timeline slips by 3-6 weeks, and the homeowner pays for redraws. We file directly with Palm Beach County from day one.
- Flat roof decking rot discovered mid-project. The original 1970s-80s flat roofs across Boca Del Mar’s CBS homes develop chronic ponding from the nearly zero pitch. When we tear off these aged built-up systems, rotted plywood decking is found on the majority of jobs. Our crew carries extra decking material to every Boca Del Mar job as a matter of routine, not exception.
- Non-impact windows specified for additions. A new bedroom or converted garage with standard vinyl windows will fail Palm Beach County inspection. We see this after other contractors have already framed and drywalled. The fix is tear-out and replacement. We spec impact-rated from the first takeoff.
- Slab settlement from inadequate drainage prep. The shallow water table in Boca Del Mar wicks moisture upward through poorly prepared slabs. New ADUs crack, heave, or grow mold within two years. Our site prep includes engineered fill, vapor barriers, and perimeter drainage designed for 2-4-foot water tables.
Pricing for Home Additions & ADU in Boca Del Mar, FL
Here’s what typical projects run in the Boca Del Mar market, based on our recent work in 33433 and surrounding Palm Beach County:
| Project Type | Price Range in Boca Del Mar |
|---|---|
| Home Addition (room or bump-out) | $45,000 - $130,000 |
| Garage Conversion ADU | $30,000 - $80,000 |
| ADU Construction (new detached) | $90,000 - $220,000 |
| Impact Window Installation (whole-home upgrade triggered by addition) | $8,000 - $25,000 |
What moves you within these ranges? Square footage, structural complexity, and how much of the existing home needs upgrading to meet current code. A garage conversion on a 1982 CBS home with a 200-amp panel and solid roof decking sits at the lower end. A detached ADU with full kitchen, separate meter, and extensive site drainage work pushes toward the top. Every estimate we provide is line-itemed and fixed-price. Call (844) 665-0162 for your free estimate.
We Also Serve Cities Near Boca Del Mar
Our crews work throughout southern Palm Beach and northern Broward counties. If you’re in Boca Del Mar proper, or nearby in Boca Raton, Sandalfoot Cove, Deerfield Beach, or Lighthouse Point, we bring the same county-permit expertise and material specification discipline to your project.
Serving Boca Del Mar, FL - Our Local Coverage Area
We’re based in the Boca Del Mar 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 Boca Del Mar
Yes. Boca Del Mar is unincorporated Palm Beach County, so all permits must be filed with Palm Beach County’s Building Division, not the City of Boca Raton. Contractors who submit to the wrong authority face rejection, re-submission fees, and 3-6 week delays. We file correctly the first time. Call (844) 665-0162 to start your permit package.
Yes, in most cases. Palm Beach County’s high-velocity hurricane zone code requires impact-resistant openings or code-compliant shutters on any new or replaced windows and doors. If your addition ties into the existing structure and the inspector identifies original single-pane aluminum windows in the modified area, the county can require upgrades to maintain the building’s envelope integrity. We assess this during our initial site visit and include it in the estimate. Call (844) 665-0162 for a free evaluation.
Because we find rotted plywood decking on the majority of jobs when we tear off the original 1970s-80s flat roofs. The near-zero pitch creates chronic ponding, and the built-up roofing systems of that era weren’t designed to last 45+ years in South Florida’s sun and salt. Running out of decking mid-project stalls insulation, drywall, and everything downstream. We stock extra so the schedule doesn’t slip. Call (844) 665-0162 to schedule your site evaluation.
The water table, typically 2-4 feet below grade, means standard slab prep often isn’t adequate. Moisture wicks upward through the soil, causing cracking, heaving, and mold in improperly prepared foundations. Our ADU site prep includes engineered fill, vapor barriers rated for high water tables, and perimeter drainage systems that keep the slab dry. Palm Beach County inspects drainage as a standalone phase before we pour. Call (844) 665-0162 to discuss your specific site conditions.
No. Any new or replaced sliding glass door in Boca Del Mar must be impact-rated or paired with code-approved shutters that meet HVHZ standards. Standard sliders will fail inspection. We specify impact-rated units from Milgard, Simonton, or CGI’s product lines, and we engineer the header support for the additional weight and wind load. Call (844) 665-0162 for a free estimate on your sunroom or enclosed patio.
Ready to expand what’s possible in your Boca Del Mar home? Whether you’re converting a garage for rental income, adding a bedroom for family, or building a detached ADU from the ground up, our crew handles every phase, one contractor, every phase. Call Groundwork Construction Co. of South Florida at (844) 665-0162 for your free, line-itemed estimate. We’ll walk your property, explain the county permit path, and show you exactly how your project gets built to spec, not to convenience.
Written by Raymond Estevez, Owner at Groundwork Construction Co. of South Florida, serving Boca Del Mar and South Florida homeowners.