IKO Home Additions & ADU Nationwide

IKO Home Additions & ADU: The Fort Lauderdale Owner’s Guide

If you’re looking at an IKO home addition or ADU in Fort Lauderdale, the honest installed price range runs $45,000 – $130,000 depending on square footage, foundation work, roof tie-ins, and finish level. That’s a real number from a contractor who has built additions across Broward County, from Victoria Park to Rio Vista, and it includes the full scope: permits, framing, roofing matched to your existing IKO shingle profile, electrical, plumbing, drywall, and trim. Most owners find this page because a previous addition is showing its age – the roofline is leaking where the old roof meets the new, the stucco has hairline cracks along the tie-in wall, or the space never cooled properly because someone skipped the right insulation in a Florida attic. We’ll walk through what actually matters, what it costs, and what makes these additions last in this climate.

Call (754) 551-2922

One thing up front: Penhallow Remodeling Fort Lauderdale is an independent contractor. We’re not affiliated with IKO, but we work around their roofing systems constantly, and we know how to tie a new addition into an existing IKO roof so the warranty on the shingles stays intact and the transition never leaks.

Which IKO Models This Applies To

IKO makes a full line of asphalt shingles – Cambridge, Dynasty, Nordic, Royal Estate, and the Marathon line you’ll see on a lot of older South Florida homes. When we build a home addition or ADU, the roof has to match the existing shingle profile closely enough that the seam between old and new doesn’t telegraph from the street. The compatibility gotcha most homeowners never hear about: IKO Cambridge and Cambridge Cool Colors have slightly different granule blends and exposure dimensions than Dynasty, and mixing them on a visible roof plane looks wrong immediately. We match the exact series and color code printed on the original bundle wrapper, or if that’s long gone, we take a shingle sample to a local Fort Lauderdale roofing supplier who stocks the full IKO line. If the roof is older, we’ll also check whether the existing shingles still meet current Florida wind-load codes before tying new framing into them. For ADUs, the roof pitch matters more than the shingle brand – a 4/12 pitch sheds water differently than a 6/12, and IKO’s installation specs require specific underlayment at lower slopes. We don’t guess at that.

Signs Your IKO Home Additions & ADU Is Failing

• Water staining at the wall-to-roof junction. The most common failure point on any Fort Lauderdale addition is where the new roof dies into the existing wall. If flashing was bent wrong or step flashing was skipped, rainwater follows the seam inside. You’ll see it first as a soft brown line on the ceiling near the tie-in.
• Hairline stucco cracks running vertically at the old-wall/new-wall seam. South Florida’s wet and dry seasons make clay soils expand and contract, and additions settle differently than the main house. A crack wider than a dime at the seam means the foundation transition wasn’t engineered for differential settlement.
• The addition is always 6 – 10 degrees warmer than the rest of the house. That’s almost always an attic ventilation or insulation problem. Builders in a hurry skip ridge vents or under-insulate the ceiling. In Fort Lauderdale humidity, that also leads to condensation and mold in the attic cavity.
• Shingle granules in the gutters only near the new roof section. If the newer shingles are shedding granules while the original roof looks fine, the addition roof may have been installed over damp decking or with the wrong fasteners. IKO shingles have a specific nail pattern and penetration requirement – skip it and the bond fails early.
• Doors inside the addition stick or won’t latch in summer. That’s not a humidity quirk. It means the addition’s framing and finishes are moving, usually because the sill plate wasn’t anchored properly or the new slab wasn’t tied to the old foundation with rebar dowels.

Replacement Cost & What’s Included

A home addition in Fort Lauderdale runs $45,000 – $130,000. An ADU, which includes a kitchenette or full kitchen, separate electrical panel, and its own entrance, typically runs $90,000 – $220,000 once you account for impact windows, a mini-split or tie-in HVAC, and the additional plumbing drain work. Garage conversions land between $30,000 and $80,000. What moves the number: the condition of your existing IKO roof and whether we can tie into it or have to re-roof that section, the foundation type (slab-on-grade additions cost less than anything requiring piers or stem walls), and the finish level inside. Every quote from us includes a written line-item breakdown before any work starts, so you see exactly what the lumber, the shingle match, the drywall, the tile, and the labor each cost. The number we hand you on day one is the number on the final invoice. And if anything fails within 365 days of completion, we come back and fix it at no charge. That’s the 365-Day Done Right Promise, and it’s in writing on every project we do in Fort Lauderdale.

DIY or Call Us?

There’s almost nothing about framing an addition or ADU that’s safe as a weekend project. Cutting a roofline open during a Florida rain season, splicing into existing structural walls, running new electrical service, and pouring a slab that has to meet Miami-Dade wind codes – those are jobs where a wrong move puts the whole house at risk. What you can do yourself: check your attic for water staining after heavy rain, look for shingle granules in the gutters, and watch whether doors in the addition start sticking seasonally. That information helps us diagnose faster. If you’re in Fort Lauderdale and you think your existing addition is failing or you’re ready to price a new one, call us at (754) 551-2922. Trevor Nash will walk the site, give you a written scope and a real number, and tell you straight whether the existing roof can be saved or needs to be redone. Tell me what you need, I’ll tell you what it costs – then we’ll get it done.