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Cover Home Additions & ADU: The West Palm Beach Owner’s Guide
Home additions and ADU construction in West Palm Beach typically run $45,000 to $130,000 installed, and the bulk of that range comes down to foundation work, tie-in complexity, and finish level rather than square footage alone. Most owners reach out to us after realizing their property already has the zoning allowance for a detached or attached structure but nobody has walked them through what the work actually protects, from the existing roofline to the electrical panel. When a Cover-style addition or ADU shows signs of stress, the symptoms are usually visible at the transition points: hairline cracks where the new slab meets the old, moisture staining at the roofline tie-in, or doors that no longer close square after the first full Florida summer.
We are an independent remodeling contractor in West Palm Beach, not affiliated with Cover, but we work on Cover-compatible home additions and ADU scopes every season.
Which Cover Models This Applies To
Cover home additions and ADU projects in Florida split into two broad categories that change the parts and labor we specify. Attached additions tie into the existing structure at the roofline, foundation, and often the electrical panel, which means the existing home’s framing method determines the tie-in detail. Detached ADUs are simpler in some ways because they stand on their own slab, but they introduce separate utility runs from the main service, which in West Palm Beach means trenching through sandy, fast-draining soil and pulling permits through the city’s building department.
The compatibility gotcha we see most often is panel capacity. Many homes in Flamingo Park and the neighborhoods south of Southern Boulevard were built with 100-amp panels, and an ADU with a mini-split, water heater, and laundry circuit can push the load calculation over the line. That changes the job from a simple build to a service-upgrade-plus-build, which is exactly the kind of detail we put in the written price before work starts. On the aftermarket side, we specify materials by named brand: James Hardie siding where the exterior needs to stand up to salt air, GAF roofing at the tie-in, Schluter waterproofing at any wet wall. OEM is not always an option on additions the way it is on appliance parts, so we choose materials whose manufacturer warranties you can look up yourself.
Styles & brands we work with
Signs Your Cover Home Additions & ADU Is Failing
- Doors or windows in the new structure begin to bind or stick. This usually points to slab movement or settling, common in West Palm Beach’s sandy soil after the rainy season saturates and then drains the ground under the new foundation.
- Visible cracking at the seam where the addition meets the original house. That transition point is where differential movement shows up first, and a crack there is rarely cosmetic if it widens over two or three months.
- Moisture staining or mildew at the roofline tie-in. The hip and valley detail where a new roof meets the old one is a classic leak point, and Florida’s afternoon thunderstorms will find it fast if the flashing was not lapped correctly.
- A musty, closed-up smell inside the ADU even with windows open. That often means the vapor barrier under the slab was not installed to spec, and the structure is wicking ground moisture through the concrete.
- Breakers trip when the ADU’s AC and laundry run at the same time. This is the panel capacity problem showing up in the real world, and it will not resolve itself until the load calculation is corrected.
Replacement Cost & What’s Included
In West Palm Beach, a full home addition runs $45,000 to $130,000, while a detached ADU sits higher at $90,000 to $220,000 because of the separate foundation, utility trenching, and full kitchen or bath buildout. The honest drivers of that range are the panel and service upgrade, the foundation method (slab on grade versus pier), and the finish level you choose for cabinets, countertops, and flooring.
Every price we write includes the parts and labor broken out line by line. That means the slab work, the framing lumber, the brand-name windows, the fixtures from Kohler or Moen, and the permit fees are all named before the first tool is unpacked. If the existing panel needs an upgrade, that line item is in the written price, not discovered halfway through. The 365-Day Done Right Promise applies to the completed addition or ADU: if something is not done right after we leave, we make it right.
See the difference
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AfterDIY or Call Us?
Most of what goes wrong on a home addition or ADU is not a DIY fix. Foundation movement, roof tie-in leaks, and electrical load problems all require a licensed contractor who carries the right permits and can pull the inspections that protect the structure. What an owner can do safely is document what they are seeing: take photos of cracks with a coin or ruler for scale, note when doors began sticking relative to the weather, and check whether the breaker trip happens only when two specific appliances run together. That detail helps us price the repair accurately before we ever set foot on the property.
The tile and fixture components of an ADU bathroom or kitchenette are manageable for a skilled homeowner, but the structural and electrical work is not. West Palm Beach’s sandy soil and storm exposure mean a failed addition is not a cosmetic problem; it is a structural liability that gets more expensive the longer it sits. Call (728) 203-3270 and we will walk the site, put the findings in writing, and give you a firm number before any work begins.
Key Takeaways
- Home additions in West Palm Beach run $45,000 to $130,000; detached ADUs run $90,000 to $220,000, with panel upgrades and foundation method driving the range.
- The most common failure points are slab settling, roofline tie-in flashing, and undersized electrical panels that trip under combined load.
- We write every price before work starts, line by line: labor, brand-name materials, permits, and the panel upgrade if one is needed.
- The 365-Day Done Right Promise covers every completed addition and ADU. If it is not done right, we make it right.
FAQs
A properly built addition or ADU on a correctly engineered slab should last 50 years or more, but the flashing, sealants, and exterior paint require maintenance every 3 to 7 years in the South Florida climate. The structural frame outlasts the finishes by decades, which is why we specify James Hardie siding and GAF roofing materials that carry manufacturer warranties built for coastal humidity and UV exposure. Call (728) 203-3270 if you want us to look at what is currently there and give you an honest read on remaining life.
Usually yes. Slab leveling, tie-in flashing replacement, and panel upgrades are all repairable without tearing down the structure, and those repairs run far below the cost of new construction. The question is whether the original framing was done to code, and that is something we determine by walking the site and checking the permit history. In El Cid and Flamingo Park, we regularly repair additions that are structurally sound but need their tie-in details corrected and their electrical load brought up to current code.
A straightforward attached addition usually runs 8 to 14 weeks from permit approval to final inspection, while a detached ADU with a kitchen and bath runs 4 to 7 months. Permitting through the City of West Palm Beach is the variable we cannot compress, but we pull the permits ourselves and keep the inspection schedule moving. The written price includes the start and end window, and Graham Stein walks every job site himself before the first drop cloth goes down.
We order and stage every material, from the framing lumber to the KraftMaid cabinets, Cambria or Silestone countertops, and Kohler or Moen fixtures, so nothing arrives at the job site unaccounted for. The materials list is part of the written price, with brand names and quantities spelled out. You will know what is going into the structure before the building starts, and the manufacturer warranties travel with the finished project.
Written by Graham Stein, Owner, Elmstead Remodeling West Palm Beach at Elmstead Remodeling West Palm Beach, serving West Palm Beach and nearby areas.
Call (728) 203-3270 to schedule a free estimate. A live person answers, 24/7. We will walk the property, price the work in writing before anything starts, and leave the site cleaner than we found it.
