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ES Windows Home Additions & ADU: The Los Angeles Owner’s Guide
Home additions and ADUs built with ES Windows frames and glazing in Los Angeles typically run $53,100 to $153,400 installed, depending on square footage, foundation work, and how much of the existing structure ties into the new build. Bradford Remodeling handles ES Windows-compatible framing, rough openings, and installation as part of a documented scope, and we stock the common rough-opening dimensions and flashing kits on our trucks so the work doesn’t stall mid-project. Most owners reach out when an existing door or window unit in their addition starts leaking around the frame, the glazing fogs between panes, or a slider binds in its track after a few hot summers. We’re not affiliated with ES Windows. We work with their products because the frames are predictable, and a predictable frame keeps a written price honest.
Which ES Windows Models This Applies To
ES Windows sells its products through dealer networks, and the model names vary by region. What matters on a home addition or ADU is the frame series and the rough opening. Most residential additions in Los Angeles use ES Windows’ aluminum-framed sliding and fixed units, typically with 4-5/8 inch or 6-1/4 inch frame depths. The 4-5/8 inch frame is the older standard and shows up often in 1970s through 1990s additions. The 6-1/4 inch frame is what we see on newer ADUs where the wall assembly is thicker. The compatibility gotcha: you cannot swap a 4-5/8 inch frame into an opening built for 6-1/4 inches without resizing the rough opening, which means cutting back stucco or siding. That changes the price and the scope, and it’s exactly the kind of thing we document in writing before work starts. Check the label on the interior side of the frame, usually on the sill or the jamb. The label gives you the series code, the rough opening, and the glass spec. If the label is worn off, we measure the visible glass and the frame depth on site. For replacement glass and hardware on ES Windows units, OEM parts are available, but quality aftermarket equivalents from a glazing supplier often match or exceed the original spec, especially on handles, rollers, and weatherstripping. Bradford Remodeling works with both, and we put the exact part manufacturer and spec in the written quote. We also install KraftMaid, Cambria, and Silestone materials alongside window and door work when the scope includes interior finishes in an ADU.
Styles & brands we work with
Signs Your ES Windows Home Additions & ADU Is Failing
- Condensation or fog between the panes. The insulated glass unit has lost its seal. In Los Angeles, the temperature swings between the coast and the Valley accelerate seal failure on older units. Once argon or air leaks out and moisture gets in, the glass has to be replaced, not resealed.
- Water staining on the interior drywall below the window. The flashing or the perimeter seal has failed. On additions, this usually traces back to improper sill pan installation at the original build. We remove the unit, inspect the sill, and rebuild the rough opening correctly if the substrate is rotted.
- Sliding doors grinding or jumping the track. Rollers wear out, and the track collects grit. ES Windows sliders use proprietary roller assemblies on some series, so generic rollers don’t always seat correctly. We match the roller to the series or replace the roller housing entirely.
- Drafts around the frame on windy days. Weatherstripping has compressed or the frame has shifted. On ADUs built above a crawlspace or on a hillside, minor settling is common in Los Angeles, especially in clay-heavy soil zones. The frame may need shims or a full re-anchor, not just new weatherstripping.
- Windows that won’t stay open or slam shut. Balance systems fail on hung windows, and spiral balances on older ES Windows units lose tension. This is a mechanical wear item, not a structural problem, and the fix is a replacement balance matched to the sash weight.
Replacement Cost & What’s Included
A single window unit replacement in an existing home addition in Los Angeles runs $531 to $1,770 installed, depending on size, frame depth, and whether the rough opening needs repair. That’s the part, labor, flashing, perimeter seal, and haul-away. An ADU window package with three to six units, including a slider or French door, lands between $5,310 and $17,700. The full home addition or ADU build, including framing, windows, doors, roofing tie-in, drywall, and finish work, runs $53,100 to $153,400 in Los Angeles. What drives the range: foundation type (slab versus raised), soil condition, the condition of the tie-in point on the existing house, and whether the scope is a bump-out or a full second-story addition. Every quote from Bradford Remodeling is a written line-item price before work starts. No numbers move at the door. The work is covered by the 365-Day Done Right Promise: if the window, door, or framing fails within one year, we come back and correct it at no charge.
See the difference
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AfterDIY or Call Us?
You can safely check the label on the frame, clean the track on a slider, and look for visible cracks in the perimeter caulking. What you should not attempt is pulling a window unit out of a load-bearing wall, cutting back flashing, or working on an upper-story unit without scaffolding. Window replacement on an addition or ADU means removing the old frame, checking the rough opening for rot, installing a sill pan, leveling and shimming the new unit, and flashing the exterior correctly. Get any of those steps wrong and the leak shows up months later inside the wall cavity. That is the most common failure we fix on additions built by other crews in Los Angeles: the window looks fine, the stucco looks fine, and the sheathing behind it is holding moisture. If you’re not sure, call (903) 568-7222 and ask us to look at it. The estimate is free, and we’ll tell you honestly if the window can be serviced or needs to be replaced.
FAQs
In Los Angeles, expect 20 to 30 years from the original insulated glass units, with hardware like rollers, balances, and weatherstripping wearing out in 8 to 12 years. Coastal proximity shortens frame life due to salt air, and direct western exposure shortens seal life. Call (903) 568-7222 and we’ll assess the remaining life of your units during a free estimate.
No. A failed seal means the insulated glass unit has to be replaced as a whole. The frame can be kept if it’s structurally sound, which saves money. We source replacement IGUs, not entire window assemblies, whenever the existing frame is worth keeping. Call (903) 568-7222 for a written quote on glass replacement.
A single window swap takes one day on site, including rough-opening inspection and exterior flashing. A full ADU window and door package takes two to three days. A complete home addition or ADU with ES Windows units typically runs 8 to 20 weeks depending on scope, foundation, and city permitting in Los Angeles. We’ll give you a written schedule before work starts, not after.
We stock common balances, rollers, weatherstripping, sill pans, and flashing on our trucks, and we can source series-matched replacement sashes and insulated glass units through our supplier network, usually within a week in Los Angeles. If you need a part matched to your specific ES Windows model, call (903) 568-7222 with the label information and we’ll verify fitment and give you a written price.
Get a Written Price on Your ES Windows Home Addition or ADU
If your addition or ADU has a failing ES Windows unit, or you’re planning a build and want straight numbers before you commit, call Bradford Remodeling at (903) 568-7222. We’ll come out, inspect the rough openings and existing frames, and hand you a written line-item quote with the exact part numbers, materials, and labor. Straight number, real scope, no surprises at the punch list. That’s the way Curtis Lane runs every job that leaves our shop in Los Angeles.
Written by Curtis Lane, Owner, Bradford Remodeling at Bradford Remodeling, serving Los Angeles and nearby areas.
