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ES Windows Home Additions & ADU: The Pasadena Owner’s Guide
If you’re planning a home addition or ADU in Pasadena with ES Windows in the spec, you’re looking at $45,000 to $130,000 installed, depending on square footage, foundation work, and how many window units the design calls for. We stock and install ES Windows-compatible units for additions and ADUs throughout Pasadena, and we can usually match existing ES Windows lines so the new build doesn’t look like an afterthought. Most owners reach out when their architect or plan checker flags a window spec issue, or when they realize the ES Windows product numbers on their plans don’t match what’s actually available in the current catalog.
Which ES Windows Models This Applies To
ES Windows spans a wide catalog, and the compatibility gotcha in Pasadena is this: units made before 2018 often use a different frame profile than current production, so matching an existing ES Windows installation on an older home addition means measuring the actual frame depth, not trusting the model number alone. You’ll find the model code etched on a small silver sticker on the interior face of the frame, usually on the hinge side for casements or the bottom rail for sliders. If that sticker is gone, we measure the glass thickness and frame depth to identify a compatible current-production unit.
For new ADUs and additions, the spec usually calls for ES Windows’ fixed picture units or casements to hit California Title 24 energy requirements. The current frames run deeper than older versions, which matters when you’re matching sightlines across an existing wall. OEM units are the cleanest path, but for discontinued lines, we work with a quality aftermarket equivalent that matches the glass package and frame color closely enough that nobody notices from the curb. We’re an independent Pasadena contractor, not an ES Windows dealer, so we can tell you when OEM is worth the wait and when the aftermarket equivalent is the smarter spend.
Styles & brands we work with
Signs Your ES Windows Home Additions & ADU Is Failing
- The window won’t close square anymore. On the older ES Windows frames used in many Pasadena additions from the 2000s, the hinge blocks wear down and the sash drops a few millimeters. You’ll see daylight at the corner or feel a draft against the seal.
- Condensation between the panes. A failed IGU (insulated glass unit) means the seal has broken. In Pasadena’s dry heat, this shows up as a permanent haze you can’t wipe off from either side.
- The lock engages but the window still rattles in wind. The locking hardware on some ES Windows series was mounted to a nylon bushing that cracks with age. The handle turns, the latch moves, but the sash never actually pulls tight.
- Rollers grinding or skipping on sliders. ES Windows sliding units used a zinc roller housing that corrodes in coastal-adjacent Pasadena humidity cycles. You’ll hear it before you see it.
- Frame warping or sealant pulling away. On south-facing Pasadena walls, the constant sun exposure breaks down the exterior sealant and can bow the vinyl on certain ES Windows lines if the unit was installed without proper expansion gaps.
See the difference
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After
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After
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AfterReplacement Cost & What’s Included
For Pasadena home additions and ADUs, the $45,000 to $130,000 range covers the full build: plans, permits, foundation, framing, windows, roof, rough plumbing and electrical, drywall, flooring, and finish work. What drives the number is mostly the foundation type (pier and beam runs higher than slab on grade), whether the addition ties into existing rooflines, and how many ES Windows units the design specifies. We put the price in writing before any work starts, so the number you approve is the number on the final invoice. The 365-Day Done Right Promise covers the whole project for a full year after close. If something isn’t done right, we make it right.
DIY or Call Us?
You can check the model sticker, measure the frame depth, and note whether the glass is hazed or the hardware feels sloppy. That’s useful information to have when you call. What you shouldn’t do is pull a window unit out of a load-bearing Pasadena addition wall or try to retrofit an ADU spec on a foundation that hasn’t been evaluated. Framing and glazing changes on additions require permits, and the rough opening tolerance on ES Windows units is tight. A sixteenth of an inch out of square and the unit binds, the seal fails early, and you’ve spent real money on a window that fights you forever. Call (626) 657-5396 and we’ll come measure it for free.
FAQs
Expect 20 to 30 years for the frames, with glass seals usually failing around the 12 to 15 year mark in Pasadena’s hot, dry climate. South-facing units go first. Call (626) 657-5396 for an exact assessment of your existing windows.
Yes, if the frame is still square and the failure is limited to the glass IGU, rollers, or locking hardware. We replace the failed component rather than the whole window whenever it makes sense. Call (626) 657-5396 and describe what’s happening, and we’ll tell you which way the math points.
A typical Pasadena ADU or home addition runs 4 to 8 months from first permit filing to final inspection, depending on scope and how quickly the city reviews plans. The Relay Visibility Guarantee means you get a written timeline, live arrival updates, and photo updates before and after each phase.
We carry common replacement hardware for ES Windows lines: rollers, locks, and IGU seals. Full window units are ordered per project with measurements confirmed on site. Call (626) 657-5396 for stock checks and free estimates.
Written by Luca Romano, Owner & Lead Contractor, Sawyer Remodel Pasadena at Sawyer Remodel Pasadena, serving Pasadena and nearby areas.
