Free written scope consultation - allowances, timeline, and change-order rules on paper before a single trade is scheduled
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AfterFast, Reliable Home Additions & ADU Across Deerfield Beach
Home additions and ADU construction in Deerfield Beach typically runs $45,000 to $130,000 for a room addition and $90,000 to $220,000 for a detached ADU, with coastal permits adding 3 to 6 weeks to the timeline when you’re east of the Intracoastal. We’re Barrett & Sons Construction, and we’ve been building in Broward County since 1998. If you’re planning a second story addition, garage conversion, or new detached ADU in Deerfield Beach, call (877) 610-1318 and Tom Barrett will walk your property himself, free estimate in hand.
Why Barrett & Sons Construction Is Deerfield Beach’s Preferred Home Additions & ADU Company
Deerfield Beach homeowners don’t have time for crews that show up late, quote one number, then hand over a different bill at the door. We’re a father-and-sons operation, not a franchise. Tom’s name, address, and license number are published. Look them up before you sign anything. Ask anyone on your street, or check the license number yourself. We answer our own phone, 24/7, with a live person, not a voicemail box or an out-of-state call center.
We know Deerfield Beach the way only a local crew can. The houses behind Quiet Waters Park, the older CBS block homes off Hillsboro Boulevard in 33442, the beachside condos in 33441 where salt air eats through standard fasteners in a few seasons. We’ve watched what the ocean does to a roofline on the barrier island, and we specify materials that hold up. Every price change comes as a written change order before work starts. No surprise invoices. No allowances that aren’t on paper. Tom lives twenty minutes away; if something’s wrong, he wants to know about it.
Our 90-Day Done Right Promise is written on every contract. If it’s not done right, one call brings Tom back. That’s not a slogan, it’s a guarantee he’s put his name on for 29 years.
Our Home Additions & ADU Services in Deerfield Beach
ADU Design & Permitting
A detached ADU in Deerfield Beach starts with paperwork most contractors would rather skip. We pull permits, we fill out the FEMA elevation paperwork, and we don’t tell you permits are optional, because the last contractor most customers used told them exactly that and got away with it until the inspector showed up. We work with Broward County’s Coastal Construction Control Line requirements on the east side and standard Broward permitting west of Federal Highway. Everything gets signed off by the inspector before we call the job done.
Garage Conversion ADU
Converting a garage into an ADU in Deerfield Beach typically runs $30,000 to $80,000, depending on whether you’re adding a bathroom, upgrading the electrical panel, or raising a slab that sits below current flood elevation requirements. Older CBS garages in neighborhoods around Deer Creek and The Cove often have rusted lintels and slab elevations that don’t meet FEMA Zone AE standards. We check that before we build, not after.
New Detached ADU
New detached ADUs cost more in Deerfield Beach than almost anywhere else in Broward, and there’s a reason. The salt air, the wind load requirements, and the dual permitting on the barrier island all add legitimate cost. We just finished a detached ADU in the Deerfield Beach Isles neighborhood, less than half a mile from the ocean. The original 1972 block home had rusted steel lintels over every window, and the stucco had spalled where rebar was corroding behind it. Our scope called for stainless Titen HD anchors at every load-bearing connection, hot-dip galvanized Simpson straps, and impact-rated Andersen windows. The homeowner had saved $9,000 on a cheaper inland-spec quote from another crew, but after our inspection sign-off they saw the first crew had left unsealed lap joints on the Hardie siding. Salt air would have rotted the framing within five years. That’s the difference between a Deerfield Beach-spec ADU and one built for Orlando.
Junior ADU & Interior Conversion
Interior conversions and junior ADUs in Deerfield Beach are the fastest way to add living space without touching the roofline. Attached units inside an existing footprint still trigger permit requirements, especially when you’re adding a kitchenette or second electrical service. We handle the drawings, the load calcs, and the inspection schedule. If your home is in Century Village in 33442, we’ll also flag accessibility issues that affect resale, because that’s a real consideration for that community.
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 Deerfield Beach
We don’t install mystery brands off a van. For home additions and ADUs in Deerfield Beach, we specify Andersen and Marvin windows, GAF and CertainTeed roofing, and when outdoor work ties into the addition, Techo-Bloc and Cambridge pavers. These are materials you can look up, with published specs and warranties. We stock the marine-grade fasteners, stainless anchors, and impact-rated components Deerfield Beach jobs actually need, so we’re not waiting on a parts truck from Miami when your inspection is scheduled.
Common Home Additions & ADU Problems We See in Deerfield Beach Homes
- Rusted fasteners on second-story additions. Out-of-area contractors use standard galvanized screws, not hot-dip, on framing and strapping west of the Intracoastal. Within three years, the salt-laden air turns those screws to rust streaks running down stucco. We specify hot-dip galvanized or stainless, every time.
- Slab elevation surprises. Adding a sunroom over an existing slab without checking the slab’s elevation against current FBC flood requirements is a common mistake. A change order later forces a full subfloor raise and a new permit under FEMA Zone AE. We check elevation before we draw anything.
- Uncaulked joints where new ADU meets old CBS wall. Wind-driven saltwater wicks into the block through unsealed seams, accelerating hidden rebar corrosion behind the new addition. We seal every lap joint and transition, and we show you the caulk before we paint.
- Wrong window spec on beachside sunrooms. East of the Intracoastal in 33441, sunroom enclosures must meet impact-glass requirements. We’ve torn out brand-new windows from other crews that didn’t meet Broward County’s coastal standards. You pay once for the right glass, not twice for the wrong one.
Pricing for Home Additions & ADU in Deerfield Beach, FL
Here’s what Deerfield Beach homeowners should expect to pay for the work we do. These are real ranges, not phone-quote teasers:
| Project | Typical Deerfield Beach Range |
|---|---|
| Home Addition | $45,000 - $130,000 |
| ADU Construction | $90,000 - $220,000 |
| Garage Conversion | $30,000 - $80,000 |
The biggest cost swing comes down to where you are in Deerfield Beach. East of the Intracoastal, dual permits under Broward County’s Coastal Construction Control Line and Florida DEP add weeks and legitimate engineering cost. Salt-air corrosion means stainless hardware instead of standard galvanized. FEMA Zone AE means floor elevation checks that can trigger a structural raise. West of Federal Highway, you’re mostly dealing with wind-load upgrades on older CBS block homes and standard Broward permitting. We write every scope, every allowance, and every price change as a line item on paper before a single nail moves. Call (877) 610-1318 for a free estimate. Written, line-item, no surprises.
We Also Serve Cities Near Deerfield Beach
Barrett & Sons Construction serves Home Additions & ADU in Deerfield Beach and the surrounding communities, including Lighthouse Point, Pompano Beach Highlands, Boca Del Mar, and Boca Raton. If you’re in one of those areas and planning an addition or ADU, call us at (877) 610-1318. We’ll come out and give you the same straight numbers we give our Deerfield Beach customers.
Serving Deerfield Beach, FL - Our Local Coverage Area
We’re based in the Deerfield Beach 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 Deerfield Beach
No. West of the Intracoastal, you’re outside Broward County’s Coastal Construction Control Line, so a backyard ADU goes through standard Broward County permitting. You’ll still need wind-load engineering and, depending on your flood zone, a FEMA elevation check, but the dual-agency coastal review only applies east of the Intracoastal in 33441. Call (877) 610-1318 and we’ll tell you exactly which permits your address needs before you sign anything.
Plan on 12 to 18 percent more for marine-grade materials and coastal engineering on a detached ADU in Deerfield Beach. That means a $150,000 ADU built to inland spec becomes roughly $168,000 to $177,000 when you upgrade to stainless anchors, hot-dip galvanized connectors, impact glass, and sealed lap joints. The cheaper spec fails within a decade near the ocean. We just watched a homeowner save $9,000 on a bid and then discover rusted strapping and unsealed siding joints on the inspection report. That $9,000 savings would have become a $30,000 repair. Call (877) 610-1318 for a written, line-item quote that shows the marine-grade line items separately.
Yes, but with caveats. Century Village homes are older CBS construction, and many garages sit on slabs below current FBC flood elevation requirements. Converting one into an ADU often triggers a slab raise or a flood venting retrofit, plus electrical panel upgrades for the added load. We’ve done garage conversions in 33442 and we’ll tell you the truth about what the inspector will require before you commit. Call (877) 610-1318 for a free evaluation of your specific garage.
Because your existing slab sits below the FEMA-designated base flood elevation for Deerfield Beach, and any substantial improvement to the structure triggers the requirement to bring the finished floor up to code. That’s not a contractor padding the bill, it’s FEMA Zone AE compliance. A legitimate contractor will verify the slab elevation before drawing plans, not after the slab is opened. We check elevation on every addition in Deerfield Beach before we quote, so the change order doesn’t become a surprise. Call (877) 610-1318 to have your slab checked before you plan anything.
Yes. Any sunroom or enclosed patio east of the Intracoastal in the 33441 ZIP code falls under Broward County’s Coastal Construction Control Line rules, which require impact-rated glass and upgraded wind-load connections. We’ve replaced brand-new windows from other crews that didn’t meet the standard and failed inspection. The right glass costs more up front, but it’s the only glass that passes coastal inspection and actually holds during a hurricane. Call (877) 610-1318 and we’ll spec the correct impact package for your sunroom before you order anything.
Written by Tom Barrett, Owner at Barrett & Sons Construction, serving Deerfield Beach since 1998.