Home Additions & ADU in Lantana - One Fixed Price, Permits Handled

Fast, Reliable Home Additions & ADU Across Lantana

A room addition or ADU in Lantana isn’t a simple bolt-on job. Every exterior change here runs through the community’s Architectural Review Committee, and almost every home sits on a post-tension slab that needs scanning before anyone cuts concrete. We know both layers because we’ve worked through them on dozens of Lantana projects. A typical addition here runs $45,000 to $130,000 depending on square footage, foundation work, and ARC submittals. If you’re weighing whether to add on or build an ADU, call (877) 610-1318 and we’ll walk you through what your specific lot and HOA actually allow before you spend a dollar on plans.

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Why Barrett & Sons Construction Is Lantana’s Preferred Home Additions & ADU Company

Tom Barrett started this company in 1998, and his sons run the crews. That’s not marketing language; it’s how the job site operates. When Lantana homeowners call us about an addition, the person who answers the phone knows the ARC process, knows Denton County permitting, and can tell you whether your slab is post-tension before we even visit. The permit inspector works for you, not for me. That’s a point of pride around here, because at least a few Lantana residents have been told by other contractors that permits were optional. They aren’t. Not in this community.

Our Home Additions & ADU team has handled everything from garage conversions near the amenity centers to full second-story additions on cul-de-sacs off Lantana Trail. Every scope item, every allowance, every price change arrives as a written change order before work happens. No surprise invoices at the end. We also carry a 90-Day Done Right Promise, written on every contract: if it’s not done right, one call brings Tom back. And Tom lives twenty minutes away, so “coming back” isn’t a multi-week scheduling puzzle.

Our Home Additions & ADU Services in Lantana

ADU Design & Permitting

Building an ADU in Lantana means submitting to the Architectural Review Committee before Denton County will even look at your permit application. The ARC reviews exterior materials, roof pitch, setback alignment, and sometimes even trim color. We prepare that submittal for you and manage the county permit in parallel. Because Lantana’s ARC sits on top of county permitting, the process adds two to four weeks compared to unincorporated Denton County. We build that timeline into your schedule up front, so nobody’s surprised when framing doesn’t start on day ten. Expect design and permitting fees for an ADU in Lantana to fall between $8,000 and $18,000.

Garage Conversion ADU

A garage conversion is often the most cost-effective ADU path in Lantana, especially on lots where a detached unit won’t meet ARC setback requirements. Most Lantana garages share foundation walls with the main home, which simplifies structural work, but we still scan for post-tension cables before any plumbing trench or anchor work. Conversions in Lantana typically run $30,000 to $80,000 depending on whether you’re adding a kitchen, bathroom, or just a living suite. The ARC generally cares less about garage conversions than new detached structures, since the exterior footprint doesn’t change, but you still need written ARC approval before pulling the permit.

New Detached ADU

Building a detached ADU in Lantana means starting from the ground up, which brings the full weight of the Blackland Prairie soil into play. These lots sit on shrink-swell clay that moves every season, so foundation design matters more here than in sandy South Florida soil. We spec slab-on-grade with proper post-tension or reinforced piers, engineered for the movement Lantana clay actually produces. A new detached ADU in this community runs $90,000 to $220,000 based on size and finish level. ARC review for a detached unit is more involved; they’ll want full exterior elevations and material schedules before anything gets approved.

Junior ADU & Interior Conversion

A junior ADU, often a converted bedroom with its own entrance, kitchenette, and bathroom, is a quieter option for Lantana homeowners who want rental income or a multigenerational living arrangement without changing the home’s footprint. Interior conversions usually bypass the ARC entirely, though Denton County still requires permits for the plumbing and electrical work. That’s the faster path: no exterior review, no HOA submittal, just a tight scope and a permit package. Junior ADUs and interior conversions in Lantana typically land between $25,000 and $60,000. If you’re also thinking about updating the main house, our Kitchen Remodeling in Lantana work pairs naturally with these conversions, since many homeowners open the floor plan while they’re at it.

Trusted Brands We Service in Lantana

We don’t install mystery materials off a van. For hardscape tie-ins around a new addition, we run Techo-Bloc and Cambridge Pavers, so the new walkway or patio matches the original hardscape instead of looking like an afterthought. On slabs and flatwork adjacent to the addition, Quikrete products are standard. When Lantana homeowners ask what brands we use, we can point them to the manufacturer spec sheets, look the products up online, and compare against what the original builder installed. That matters when the ARC asks about material consistency. We keep these brands in regular rotation and can usually source Lantana-specific orders within a few days, so material availability rarely holds up a schedule.

Common Home Additions & ADU Problems We See in Lantana Homes

• Post-tension slab complications. Nearly every Lantana home built between 2003 and 2015 sits on a post-tension slab. Cut into one without ground-penetrating radar and you risk severing a tensioned cable, which can cause irreversible structural damage. We scan every slab before any cut, core, or anchor.
• ARC rejection on exterior materials. The Architectural Review Committee in Lantana has rejected additions for roof shingle color, window brand choice, and even exterior paint tone. We’ve learned to submit exactly what the ARC expects to see the first time, which saves our clients four to six weeks of re-review.
• Clay soil movement under new footings. North Texas Blackland Prairie clay expands after spring rains and contracts in August heat. An addition designed without accounting for that movement will show cracks at the seam where old meets new within a few years. Our footings are engineered for that seasonal movement.
• Aging roof intersections on second-story additions. Many Lantana homes are hitting the 15 to 20-year mark, which means original roof systems are near end of life. Tying a new second-story addition into an aging roof without addressing the existing shingles creates a leak liability. We evaluate the existing roof condition before we ever frame the new space.

Pricing for Home Additions & ADU in Lantana, FL

We Also Serve Cities Near Lantana

We regularly run addition and ADU projects in Lake Worth, Lake Worth Corridor, Boynton Beach, and Greenacres City, bringing the same permit-first, written-change-order approach to every job. If you’re in one of those communities and weighing an addition or ADU, call (877) 610-1318 and we’ll come out, walk the lot, and give you a straight answer on what’s buildable. The same crew that works Lantana handles those nearby cities too.

FAQs - Home Additions & ADU in Lantana