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

Fast, Reliable Home Additions & ADU Across Wellington

A home addition or ADU in Wellington typically runs $45,000-$130,000 for most room additions, $90,000-$220,000 for a new detached ADU, and $30,000-$80,000 for a garage conversion. Those are real numbers from this market, not national averages that ignore what the water table and wind code do to a job. If you’re planning an addition off South Shore Boulevard or near the polo fields, call us at (877) 610-1318 for a written estimate that accounts for what Wellington actually throws at a foundation and a roof.

Call (877) 610-1318

We’re Barrett & Sons Construction. Tom Barrett and his sons run the crews themselves. We know this village because we’ve framed additions here through every hurricane code cycle since the 2004-2005 season changed the rules, and we’ve learned exactly where the groundwater sits under different neighborhoods in 33414. That local knowledge is the difference between a clean permit inspection and a failed one.

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

Wellington homeowners tend to ask harder questions than most. Many of you have already been burned once: a national outfit quoted one number over the phone, then handed you a change order that had nothing to do with anything you approved. That is exactly the problem we built this company around in 1998: every scope, every allowance, every price change arrives as a written change order before work happens. You do not get a surprise invoice. You get a paper trail.

Our name is on the truck. Tom Barrett publishes his name, his address, and his license number. Look it up before you sign anything. The crew members who show up in Wellington are background-checked and uniformed, and most days Tom or one of his sons is standing on the job site with them. Calls are answered by a live person 24 hours a day, seven days a week, not a voicemail box or an out-of-state call center. When a Wellington homeowner calls about a garage conversion near Greenbriar or a second-story addition near the Aero Club, the person on the other end of the line knows what 33414 means.

We’ve earned a strong local reputation doing Home Additions & ADU work throughout the county, and Wellington customers keep calling us back. Not because we are the cheapest bid. Because the permit inspector signs off on the first or second visit. Because the engineered plans hold up. Because when something needs fixing within the 90-Day Done Right Promise, one call brings Tom back. That promise is written on every contract.

Our Home Additions & ADU Services in Wellington

ADU Design & Permitting

This is where most Wellington ADU projects get won or lost before a shovel hits the ground. Palm Beach County building codes for accessory dwelling units are strict, and the site conditions across the village are not uniform. We handle the architectural drawings, the structural engineering, the permit applications, and the inspections as one package, so the design always matches what the county will actually approve. On a lot where the water table sits 18 inches below grade, that means the plan accounts for dewatering before the footer is even drawn.

Garage Conversion ADU

Converting an existing garage is usually the most cost-effective path to an ADU in Wellington, because it uses the slab and roofline already there. Most 1980s-to-early-2000s CBS homes in the village have garages that can be converted cleanly, but the work still requires new electrical, insulation upgrades, and either an impact-rated door or an opening that meets the 170 mph design wind speed. We pull permits and schedule inspections so the finished unit is legal, insurable, and rentable without a code fight later.

New Detached ADU

A new detached ADU in Wellington is a bigger undertaking, and the water table is the first thing we address. Any footer, any slab, any below-grade utility runs into groundwater within two feet of the surface across much of the former Everglades flatland the village is built on. That means dewatering plans, possibly temporary wellpoints, and footers sized to handle saturated soil conditions. The structure itself must meet the county’s wind-load requirements: engineered roof-to-wall strapping, impact-rated windows and doors, and shear wall details that a generic plan never includes.

Junior ADU & Interior Conversion

For homeowners who don’t want or can’t fit a detached structure on their western-equestrian-zoned parcel, a junior ADU or interior conversion can work well. This is a kitchenette, bath, and living space carved from existing square footage, and in Wellington it is often the fastest permitted path because it does not expand the building footprint and generally avoids new foundation work. But it still triggers electrical and egress requirements, and the county still inspects it. We make sure every inspection is scheduled and every correction is addressed before it becomes a stop-work issue.

Second-story additions deserve their own note. On a CBS ranch or two-story estate in neighborhoods like Palm Beach Point or Olympia, adding upward means opening the existing roof and tying new framing to the existing block and truss system. The Wellington wind code demands double hurricane straps at every roof-to-wall connection and a full permit inspection before drywall closes. Our crew framed one such addition near Palm Beach Point where we had to schedule rough-in and roof work for July, because the owner was in Belgium until the end of the Winter Equestrian Festival and would not tolerate staging equipment visible from the arena. That is Wellington scheduling reality.

Trusted Brands We Service in Wellington

We install materials you can look up, not mystery brands off a van. On Wellington additions and ADUs, that means PGT and CGI impact-rated windows and doors when the opening needs to carry the wind load, and Simonton where the spec calls for a proven mid-range line. We keep local supplier relationships across Palm Beach County stocked enough that Wellington customers do not wait weeks for an engineered window package. If the product name on your quote isn’t one you can verify, ask why.

Common Home Additions & ADU Problems We See in Wellington Homes

• Flooded footers from unmanaged groundwater. A contractor who doesn’t plan for dewatering on a Wellington ADU will watch a clean footer dig turn into a muddy, collapsing hole by mid-morning. The water table 18 to 24 inches down does not care about the schedule.
• Failed wind-load inspections after the roof is on. Skipping the engineered strapping plan seems cheaper until Palm Beach County’s 170+ mph design wind speed inspection fails the structure. Now the roofing is already done, and the fix costs more than doing it right the first time.
• Season-driven stop-work orders. Starting a garage conversion in February near a WEF-adjacent property invites noise complaints from seasonal neighbors. Those complaints turn into stop-work orders. May through November is when disruptive framing and roofing work belongs in this village.
• Permit-free additions that stall resale. We hear it often: the last contractor said permits were optional. In Wellington they are not, and an unpermitted addition or ADU becomes a liability at closing. The permit inspector works for you, not for me. That’s why we like him.

Pricing for Home Additions & ADU in Wellington, FL

We Also Serve Cities Near Wellington

Our Home Additions & ADU in Wellington customers often ask if we cross the village line. We do. Same crews, same written-change-order rules, same 90-Day Done Right Promise. We regularly work in Royal Palm Beach, Greenacres City, Lake Worth, and Lake Worth Corridor, so if your project sits just outside 33414, call (877) 610-1318 and we will check your street.

FAQs - Home Additions & ADU in Wellington