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ES Windows Home Additions & ADU: The Woodland Hills Owner’s Guide
We install and retrofit ES Windows into home additions and ADU projects across Woodland Hills, with full project builds typically running $45,000 – $130,000 depending on square footage, foundation work, and how many window and door units you’re spec’ing. If you have an existing ES Windows product that’s failing inside an addition or ADU, we can match the replacement unit to your original frame and glazing spec without tearing out the surrounding wall. Most owners discover the failure as a window that won’t seal against the July heat, a sliding door that binds after the rains, or a frame that has settled enough to let conditioned air leak out year-round.
Woodland Hills sits in a specific microclimate: hot, dry summers that push past 100°F in the flats below Ventura Boulevard, cooler mornings up in the hillsides above Topanga Canyon Boulevard, and Santa Ana winds that test every weather seal. ES Windows builds residential aluminum and vinyl lines with thermal breaks designed for inland Southern California heat, but even well-built frames wear out. The good news is that the surround work matters as much as the unit itself, which is where Sawyer Remodel Woodland Hills comes in. We handle the full opening, not just the glass.
Which ES Windows Models This Applies To
ES Windows produces a handful of residential series, and compatibility is not universal across them. If your addition or ADU was built in the last 15 years, you’re most likely working with the ES Windows 3000 series (thermally broken aluminum, single-hung and horizontal sliders), the 5000 series (upgraded thermal break with better U-factor ratings), or the 7000 series (their higher-end line with wider frames and larger glazing capacity). Older stock may include the 2000 series, which ES has largely phased out of current production but still shows up in ADUs built during the 2005 – 2015 Woodland Hills building boom.
Here’s what you need to know before buying any replacement part or unit: the frame depth and glazing pocket on a 3000 series are not the same as a 7000 series. A 7000 series sash will not drop into a 3000 series frame without modifying the rough opening, and the weatherstripping profiles differ between series. You can identify your series by looking at the spacer bar etched into the glass corner, the manufacturer label on the frame head or jamb, or the lock hardware style. If the label is gone (common after years of sun exposure in Woodland Hills), a measurement of the frame depth gets us most of the way there.
As an independent licensee committed to a single-company guarantee, we source OEM where it makes sense and quality aftermarket equivalents where the original part was underspecified. ES Windows uses a proprietary corner key and glazing bead on several series, meaning the aftermarket options are limited and the OEM path is often the only path. We stock common window and door hardware for ES Windows frames, including balances, rollers, locks, and weatherstripping, in our Woodland Hills service vehicles so the first visit usually solves it. For full replacements tied to an addition or ADU project, we order direct and coordinate the install with the surrounding framing and finish work.
Styles & brands we work with
Signs Your ES Windows Home Additions & ADU Is Failing
- Increasingly difficult sliding operation. The rollers in an ES Windows horizontal slider are load-bearing; when they flatten or seize, the sash drags and eventually gouges the track. In Woodland Hills, dust and fine grit from hillside construction speed this up. You can inspect the roller assembly from the bottom edge of the sash and check for white powder residue, a sure sign of worn nylon wheels.
- Interior drafts or outdoor heat coming through the closed sash. Weatherstripping on ES Windows sashes compresses and cracks after years of repeated expansion and contraction. The seal at the meeting rail is the first to fail. If you can slip a piece of paper between the sash and the frame and it pulls out without resistance, the seal has failed and you’re paying to cool or heat Warner Center air.
- Visible seam separation where the side jamb meets the head or sill. Poor initial installation, or stud movement in a hillside ADU above Topanga Canyon Boulevard, will open the frame corners. The window keeps working but the structure is compromised. This is the kind of thing that gets caught during a full addition renovation before it becomes a leak path.
- Lock hardware that no longer aligns. A sagging sash (worn hinges on casements, or stretched balance cords on single-hungs) means the lock no longer engages without lifting or forcing the sash. That’s a safety hazard and a sign the balance system is gone, not a lock problem.
- Condensation trapped between the panes. That’s a failed seal on the insulated glass unit itself. In a 10-year-old ES Windows unit any double-pane seal can fail, and Woodland Hills heat accelerates it. The fog won’t wipe off and no amount of cleaning fixes it; the only fix is an IGU replacement.
See the difference
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AfterReplacement Cost & What’s Included
For a full home addition or ADU project in Woodland Hills that includes ES Windows products, you’re looking at $45,000 – $130,000 as a complete build. That’s the framing, foundation, electrical, plumbing if included, the new window and door packages, the drywall, the finishes, and the final inspection. If you’re asking about replacing a handful of failed ES Windows units inside an existing addition, the math is closer to $450 – $2,000 per opening for hardware and seal work, or $800 – $2,500 per window for a full sash replacement, with a full-frame replacement on a large slider or picture window landing between $3,000 and $6,000 including finish trim and stucco or siding repair.
Every quote from Sawyer Remodel Woodland Hills includes the same structure: line-item parts, line-item labor, the written price before any work starts, and the 365-Day Done Right Promise in writing. That means if the sash we installed fails within a year, we show up and make it right, free second visit included, no argument. No change orders once you’ve approved the number. That’s the Relay Standard and it’s non-negotiable on every job.
DIY or Call Us?
Some things are safe to check yourself. You can clean the tracks, test the locks, check for visible frame separation, and identify the series label. That information saves you time when you call. What isn’t safe is pulling a sliding sash, any sash with balance tension, or a picture window from its frame without proper glazing supports and lift equipment. A large ES Windows picture window can weigh more than two hundred pounds, and the load is carried on thin glass edges. If it shifts while you’re working on it, it shatters against the frame and the shards drop before you can get clear. That’s not a scare tactic; it’s the physics. If the job requires more than a utility knife and patience, call us at (341) 217-2776 and we’ll handle the full repair or replacement, from the rough opening to the finish work.
FAQs
Expect 15 – 25 years of useful life from an ES Windows frame in this climate before seals, balances, or hardware begin to fail. This assumes the original installation was done square and level. Units exposed to direct afternoon sun on the south and west sides of a Woodland Hills home age faster than shaded north elevations, and frames on hillside properties with shifting soil sometimes need attention inside 10 years. We see this regularly: the glass is fine, but the frame has moved and the seals can’t keep up.
Most hardware failures, seal failures, and balance issues are repairable without changing the whole frame. We handle roller replacements, lock alignments, weatherstripping swaps, and IGU (insulated glass unit) replacements as standalone repair jobs. If the frame itself has separated, if the thermal break has failed, or if the frame has been racked out of square by soil movement, a full unit replacement is the honest answer because the failure will return. We’ll tell you which one you need when we see it.
A single window repair or sash replacement is a same-visit job in most cases; a full ADU or home addition is not. A typical ADU build in Woodland Hills runs 4 – 8 months depending on permitting, soils, and the finish package. A single-room addition runs 3 – 5 months. We give you a written schedule before you approve the price, and you get photo updates before and after each phase so you know what happened that week.
Yes. Our Woodland Hills service vehicles carry the common failure items: balances, rollers, lock sets, weatherstripping profiles, and glazing beads for the most common ES Windows series. The less common parts are sourced directly from the manufacturer or a specialty supplier, which usually adds a few days to the timeline. For full window packages on additions and ADUs, we place the factory order once your plans are approved and coordinate delivery with the framing schedule so nothing sits on site waiting to be damaged.
If your ES Windows unit has failed or you’re planning an addition or ADU in Woodland Hills and want the window package done right, call (341) 217-2776. We’ll schedule a free estimate, put the price in writing, and make sure the work is covered by the 365-Day Done Right Promise.
Written by Luca Romano, Owner, Sawyer Remodel Woodland Hills at Sawyer Remodel Woodland Hills, serving Woodland Hills and nearby areas.
