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 North Palm Beach
If you’re planning a home addition or ADU in North Palm Beach, the number you need to start with is (877) 610-1318. A full addition in this village typically runs $45,000 to $130,000, and a detached ADU lands between $90,000 and $220,000. But here’s what separates a bid that holds up from one that falls apart three years in: the salt air off the Lake Worth Lagoon decides your materials, and Palm Beach County’s 170+ mph wind zone decides your engineering. We’ve been building in this corridor long enough to know both.
Barrett & Sons Construction has served North Palm Beach homeowners for years. Tom Barrett and his sons run the crews themselves, and we answer our own phone. When you call about an addition off Prosperity Farms Road or a garage conversion near the Country Club, you’re talking to the people who will actually show up with the plans and the permit.
Why Barrett & Sons Construction Is North Palm Beach’s Preferred Home Additions & ADU Company
We’re the owner-operated crew in North Palm Beach, not a call center that subs your job to whoever’s available. Tom Barrett founded this company in 1998, and his sons are on-site most days. That matters when a canal-front addition hits a footing problem at 3 p.m. on a Thursday: the person who can make the call is already standing in the yard.
Every job we take in North Palm Beach gets a written scope, written allowances, and written change orders. The permit inspector works for you, not for me, and that’s the way we like it. Our 90-Day Done Right Promise is written on every contract: if it’s not done right, one call brings Tom back. We publish our name, address, and license number. Look it up before you sign anything.
We’re also the crew that tells you the truth about coastal construction before you spend a dime. Canalfront fill lots, original 1960s CBS block, jalousie windows long out of code compliance: we’ve seen all of it in North Palm Beach, and we price for what’s actually under the stucco, not what the listing photos promised.
Our Home Additions & ADU Services in North Palm Beach
We handle the full range of Home Additions & ADU work, but in North Palm Beach three types of projects dominate the calls we get, and each has its own coastal twist.
ADU Design & Permitting
An ADU in North Palm Beach isn’t a shed with a bathroom. It’s a permitted structure that has to meet Palm Beach County’s high-velocity hurricane zone requirements, flood-zone elevation rules, and salt-air material specs all at once. We handle the drawings, the geotech when needed, the permit submittal, and the inspections sign-off. You get a fixed scope in writing before anything gets demolished.
New Detached ADU
A detached ADU in North Palm Beach typically runs $90,000 to $220,000, and the range is driven by what’s under the ground as much as what goes above it. On the finger canals, shallow 1960s fill footings often need helical pier underpinning before the slab goes in. We budget for that from day one, so you’re not signing change orders halfway through the job.
Garage Conversion ADU
Converting a garage in North Palm Beach usually costs between $30,000 and $80,000. The biggest variable isn’t drywall, it’s the existing envelope: those original jalousie windows won’t pass impact-resistance code, and the slab may need to be re-evaluated if you’re adding plumbing. We quote the conversion as a complete permitted structure, not a cosmetic flip.
Junior ADU & Interior Conversion
A junior ADU carved out of an existing home in North Palm Beach is the most cost-controlled path to rental income or a family suite. We’re careful here, because interior conversions on original CBS ranch homes often reveal undersized electrical panels that Florida’s substantial-improvement rules require upgrading once the permitted scope crosses certain cost thresholds.
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.
Salt Air Decides the Materials in North Palm Beach
Here’s the conversation we have with every homeowner in North Palm Beach before we talk square footage: what’s the spec on the fasteners? On a canal-front home in the Village, our crew opened up an original CBS ranch to add a second-story suite and found the existing flat-roof fasteners had corroded to powder from decades of Intracoastal salt air. We replaced every uplift strap with hot-dip galvanized hardware, spec’d marine-grade 316 stainless for the new balcony railings, and re-supported the load-bearing wall with helical piers after the geotech report showed the old fill lot couldn’t handle the second-floor point loads.
That’s not a worst-case story. That’s a Tuesday in North Palm Beach. The salt-laden air off the Lake Worth Lagoon accelerates corrosion on fasteners, flashing, rebar, and HVAC equipment far beyond what inland Palm Beach County sites experience. We specify stainless and hot-dip galvanized hardware on every exterior connection. We use sealed paver joints with polymeric sand from Techo-Bloc or Cambridge Pavers so the salt doesn’t eat the base over time. The cheap inland spec costs less on day one, and fails the next uplift inspection within a decade. We’d rather build it once.
Trusted Brands We Service in North Palm Beach
We install materials you can look up, not mystery brands off a van. On North Palm Beach hardscape and exterior work, we regularly specify Techo-Bloc, Cambridge Pavers, and Oldcastle products, with Quikrete for structural concrete where the project calls for it. We know how these materials perform in a salt-air, high-wind coastal zone, because we’ve watched them hold up on jobs along the Intracoastal for years. When a homeowner calls us about a failing paver patio near the Country Club, we can usually tell them what’s under the joints before we even dig. That kind of local product knowledge isn’t on a national contractor’s script.
Common Home Additions & ADU Problems We See in North Palm Beach Homes
- Corroded flat-roof fasteners on original CBS ranches: The low-slope and flat roof sections common to North Palm Beach’s 1960s and 1970s build-out collect salt spray from the Lagoon, and the original hardware often rusts through from the underside. Any addition that ties into an existing roof needs a full fastener and uplift-strap evaluation first.
- Shallow fill footings on canal-front lots: Many of the original waterfront homes were built on fill with footings that predate modern soil-bearing requirements. Adding a second story or a detached ADU on those sites routinely requires helical pier underpinning or grade-beam work, which is why we tell clients to budget for a geotech report before bidding the structural scope.
- Jalousie windows that fail impact code: Garage conversions and ADU additions in North Palm Beach get held up at inspection sign-off when the original jalousie windows are still in place. Palm Beach County’s impact-resistance requirements apply to any permitted opening, and those old windows were out of compliance thirty years ago.
- Undersized electrical panels on homes crossing the substantial-improvement threshold: Florida’s rules trigger a full panel upgrade when permitted renovations cross certain cost thresholds, and North Palm Beach’s original stock of 1960s-era panels is rarely up to the load of a new ADU or second-story HVAC system.
Pricing for Home Additions & ADU in North Palm Beach, FL
We don’t hide behind “it depends.” Here are the ranges we quote in North Palm Beach, and they’re calibrated to the coastal-spec materials and permitting triggers this village actually requires. The cheap inland number is not the number that survives a hurricane inspection.
| Project Type | Typical Range in North Palm Beach |
|---|---|
| ADU Construction | $90,000 - $220,000 |
| Home Addition | $45,000 - $130,000 |
| Garage Conversion | $30,000 - $80,000 |
What moves the number: geotech reports on canal-front lots, helical piers when fill soils fail, impact-rated openings, uplift-rated roof assemblies, and marine-grade fasteners throughout. If another bid doesn’t mention those line items, the price isn’t lower, it’s just incomplete. We give every North Palm Beach homeowner a written, line-item quote before work starts, and every change comes as a written change order. An allowance that isn’t on paper is a surprise waiting for a date. Call (877) 610-1318 and we’ll walk the property and give you an honest number.
We Also Serve Cities Near North Palm Beach
Our crews serve North Palm Beach and the surrounding communities, including Lake Park, Riviera Beach, Palm Beach Gardens, and Palm Beach. If you’re a few miles up the road and wondering whether we cover your street, call us. If we’re not the right fit for your project, we’ll tell you that too. We’d rather send you to someone honest than leave you with a bad job.
Serving North Palm Beach, FL - Our Local Coverage Area
We’re based in the North Palm 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 North Palm Beach
Because North Palm Beach sits inside Palm Beach County’s high-velocity hurricane zone and the Lake Worth Lagoon salt-air corridor at the same time. Your 300-square-foot addition has to meet 170+ mph wind-load requirements, flood-zone elevation rules, and corrosion-resistant material specs simultaneously. That means uplift-rated roof assemblies, impact-rated windows, hot-dip galvanized or stainless fasteners, and often a geotech report before the footing goes in. The inland bid that skips those line items isn’t cheaper, it’s incomplete, and it’ll fail inspection or rust through within a decade. Call (877) 610-1318 for a scope that accounts for all three layers.
Yes. Many original canal-front homes in North Palm Beach were built on fill lots with shallow footings that predate modern soil-bearing requirements. A geotech report tells you whether the existing foundation can carry second-floor point loads or whether you need helical pier underpinning or grade-beam work. Skipping it to save $2,000 can turn into a $40,000 change order when the footing fails inspection. We budget for the report up front on every waterfront structural job, and we’ll review the results with you before we pull the permit. Call (877) 610-1318 to schedule a site walk.
Your permit gets held up at inspection sign-off. Palm Beach County’s impact-resistance code applies to every permitted opening, and original jalousie windows from the 1960s and 1970s don’t come close to meeting current standards. You’ll need to replace them with impact-rated windows or shutters as part of the conversion. We quote that in our garage conversion ADU scope from the start, and our range of $30,000 to $80,000 already assumes the window replacement. Call (877) 610-1318 and we’ll confirm what your specific garage needs.
We spec hot-dip galvanized or 316 stainless hardware on every exterior connection, not standard galvanized. Standard galvanized joist hangers and screws on a flat-roof addition along the Lagoon rust through in under ten years and fail the next uplift inspection. We also use marine-grade finishes on railings and flashing, and we seal paver joints with polymeric sand so salt water doesn’t wash out the base. The material upgrade adds cost up front and saves you a full re-roof and fastener replacement down the line. Call (877) 610-1318 for an exact quote on your roof assembly.
In most cases, yes, but you’ll need to meet Palm Beach County’s flood-zone elevation requirements, which often means raising mechanicals, using flood-resistant materials below the base flood elevation, and possibly elevating the structure itself. We pull the flood-zone determination and the elevation certificate as part of our ADU permitting process in North Palm Beach, and we design the scope around the FEMA map rather than hoping it works out. Call (877) 610-1318 and we’ll check your specific address and flood zone before you commit to a design.
Get a Straight Answer on Your North Palm Beach Addition or ADU
When you call Barrett & Sons Construction, a live person answers. Not a voicemail box, not an out-of-state call center. We’ll talk about your property, your plans, and what it’ll actually cost to build something that survives the Intracoastal salt air and the next hurricane. We publish our name, address, and license number, we pull permits on every eligible job, and our 90-Day Done Right Promise is written on the contract. Call (877) 610-1318 to schedule your free estimate. We’ll walk the property and give you a number in writing.
Written by Tom Barrett, Owner at Barrett & Sons Construction, serving North Palm Beach homeowners with honest, coastal-spec building since 1998.