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ECO Window Systems Home Additions & ADU: The Orlando Owner’s Guide
If you’re planning a home addition or ADU in Orlando and want ECO Window Systems products spec’d into the build, we can help. A full home addition with ECO Window Systems windows and doors typically runs $45,000 – $130,000 installed, while a detached ADU lands between $90,000 – $220,000 depending on size, foundation work, and finish level. Most Orlando homeowners reach out after realizing their existing windows or doors won’t pass the energy code for the new square footage, or after a previous contractor quoted them double for the same ECO Window Systems package we install regularly.
We’re Penhallow Remodeling Orlando, and we’re an independent general contractor, not affiliated with ECO Window Systems. We source their products through approved supply channels and install them alongside the framing, drywall, electrical, and finish work that a home addition or ADU demands.
Key Takeaways:
- Home additions with ECO Window Systems products: $45,000 – $130,000 in Orlando
- Detached ADUs: $90,000 – $220,000, depending on utility runs and permitting
- Written price before work starts, 365-Day Done Right Promise on every project
- Trevor Nash and his crew have built additions across Orlando, including in College Park
Which ECO Window Systems Models Apply to a Home Addition or ADU
ECO Window Systems manufactures vinyl and aluminum window and door lines sized for both new construction and replacement. When you’re adding square footage or building an ADU in Orlando, you’re working with new-construction openings, which means the rough opening dimensions and flashing details matter before the first stud goes up. ECO’s impact-rated lines are the ones we spec most often for Orlando additions, because Florida building code requirements under HVHZ (High Velocity Hurricane Zone) or the wind-borne debris region change what you’re allowed to install. The compatibility gotcha most homeowners hit: an ECO impact window designed for Miami-Dade approval is not automatically approved for Orlando, and vice versa. You want the product approval number that matches your Orlando jurisdiction, not just a brand name.
We identify the right ECO Window Systems product by the size sticker inside the frame, the product approval label, and the glass package code. For additions and ADUs, we do not recommend aftermarket or generic equivalents when the opening is being framed fresh. The cost difference evaporates once you account for the labor to fix an off-spec rough opening later. We run OEM ECO Window Systems products on these projects and also regularly install KraftMaid, Cambria, and Silestone products in the interior finish work, so the whole job moves under one warranty umbrella.
Styles & brands we work with
Signs You Should Replace Windows During an Orlando Home Addition or ADU
- Condensation between the glass panes on existing units. The seal has failed, and once you’re pulling a permit and opening walls anyway, patching expired windows into new construction is false economy. Orlando humidity makes failed seals obvious fast.
- The original windows are single-pane aluminum from a 1970s or 1980s build. These don’t meet current Florida energy code, and tying them into an addition typically triggers a code compliance issue on the existing structure during inspection.
- Sashes stick, bind, or won’t lock square. This usually means the frame has settled or twisted. When the addition ties into that wall, the new ECO Window Systems units need a stable, plumb substrate to anchor to, otherwise the new windows bind within a year.
- Daylight visible around the frame from inside. That’s not just air leakage, it’s water intrusion waiting to happen. Orlando’s summer storm cycle turns a small gap into a drywall failure and mold issue faster than in most climates.
- High energy bills with no other obvious cause. Old windows in an Orlando home bleed air-conditioned air from March through October. If you’re already financing an addition, the payback on correct spec windows is part of the same loan, not a separate expense.
Replacement Cost & What’s Included
A home addition in Orlando with ECO Window Systems windows and doors installed runs $45,000 – $130,000. An ADU runs $90,000 – $220,000. The spread comes down to square footage, foundation type (slab-on-grade is most common around Orlando, but some lots need stem-wall or pier work), the number of window and door openings, and the finish package. A 400-square-foot addition with two windows and a slider sits at the low end. A 1,200-square-foot addition with a kitchen and multiple impact-rated ECO openings sits at the high end.
Every proposal we write includes a line-item breakdown: framing, rough openings, ECO Window Systems product, installation, flashing, trim, and the interior tie-in work. The written price is the price. If the scope doesn’t change, the number doesn’t change. The 365-Day Done Right Promise covers the work in writing. If a window leaks or a door binds inside the guarantee window, we come back and fix it without a service call fee.
See the difference
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AfterDIY or Call Us?
Home additions and ADUs are not DIY territory, and we’ll say that plainly. The framing, the electrical rough-in, the roof tie-in, the window flashing, the permit inspections: if any of these are wrong, you’re not fixing them with a caulk gun. What you can do before calling is measure your existing window and door openings, note where you want the addition to tie into the house, and gather your property survey. That gives us a real starting point for a real number.
Where we see DIY attempts go wrong most often in Orlando is the window flashing detail where the addition roof meets the existing wall. A missed kickout flashing or an incorrectly lapped house wrap detail means water runs inside the wall cavity during the first summer thunderstorm, and by the time you see the stain on the ceiling, there’s rot behind it. This is not a place to save money. Call (850) 427-6454 and we’ll walk the property with you and give you the number first, then pick up the tool.
FAQs
ECO Window Systems vinyl and aluminum windows in the Orlando climate typically last 20 to 30 years before the glass seals or hardware start to fail, assuming correct installation and flashing. The biggest factors in Central Florida are UV exposure on south-facing walls and repeated thermal cycling through the wet season. Impact-rated units tend to outlast non-impact units because the laminated glass and heavier frames handle pressure swings better.
You can, if the existing windows meet current Florida energy code and are in good condition. But if they’re single-pane or have failed seals, the building inspector for your Orlando permit will likely flag them once the addition ties into that wall. We’ll tell you in the first walkthrough whether replacing them now saves you a second mobilization later. Call (850) 427-6454 and we’ll give you a straight answer and a written number.
Most Orlando home additions take 12 to 20 weeks from permit to final inspection. ADUs usually run 16 to 26 weeks depending on utility connections and site work. The permitting phase in Orlando is often the longest single chunk, and we handle that as part of the project, not something you chase on your own.
We order ECO Window Systems products per project, sized to the exact rough openings we frame. That’s the right way to do it on additions and ADUs, because a “stock” size rarely matches a new opening cleanly. Ordering direct also keeps the product approval paperwork clean for your Orlando inspection. We do keep commonly needed flashing, sealant, and trim materials on hand so the install crew isn’t waiting on small parts mid-job.
Get a Written Price Before Any Work Starts
If you’re planning a home addition or ADU in Orlando and want ECO Window Systems windows and doors done right, call (850) 427-6454. Trevor Nash or one of our team members will answer, set a walkthrough, and give you a written line-item price before anyone picks up a tool. That’s the way we’ve always done it, and the 365-Day Done Right Promise stands behind every project we finish in Orlando.
Written by Trevor Nash, Owner, Penhallow Remodeling Orlando at Penhallow Remodeling Orlando, serving Orlando and nearby areas.
