Window Replacement in Sunnyvale, CA — Quieter Rooms and a Smaller PG&E Bill
Most of Sunnyvale is still living with the aluminum single-pane sliders that came with the house. We measure every opening in person, quote it in writing, and install to Title 24 spec. Serving Sunnyvale, Mountain View, Cupertino, Santa Clara, Los Altos and the rest of the county.
Licensed & insured · ENERGY STAR qualified products · Written flat pricing · Free in-home measure
What we spec for Climate Zone 4
- U-factor 0.30 or better
- SHGC 0.23 or better
- ENERGY STAR qualified, NFRC labelled
What Backs the Number We Write Down
Licensed California contractor
The license number is shown as text in the footer and on every written quote.
General liability and workers' comp
Every crew member is covered before they touch your house.
ENERGY STAR qualified
NFRC-labelled units chosen for Climate Zone 4, not a national default package.
Written manufacturer and labor warranties
Two separate documents, explained in plain language before you sign.
EPA Lead-Safe certified
Required practice on Sunnyvale homes built before 1978.
Free in-home measure
Flat written pricing that does not move after we measure.
Nine Ways We Replace Glass in Sunnyvale
Most people arrive here with a symptom rather than a service name. Each one below names the case it actually solves.
Full-Frame Window Replacement
We take the old window out to the rough opening: frame, sill, and trim. Then the new unit is set, flashed, insulated, and finished so the wall behaves like a wall again.
Read the detailDouble-Pane & Insulated Glass Replacement
When the frame is sound but the seal has failed, we replace the insulated glass unit instead of the whole window. It solves the fog without the tear-out.
Read the detailEnergy-Efficient Window Installation
Low-E, argon-filled, ENERGY STAR qualified units picked for Sunnyvale's hot dry summers and mild wet winters, installed to the numbers on the label.
Read the detailImpact & Storm Windows
Impact-rated laminated glass and storm-resistant assemblies. In Sunnyvale the draw is forced-entry resistance and freeway noise more than weather.
Read the detailBay & Bow Window Replacement
Multi-unit projecting assemblies, including the support, head board, seat board, and roof detail that separate a bay that lasts from one that sags.
Read the detailDouble-Hung, Single-Hung & Casement Replacement
The everyday operating styles, plus sliders, awnings, and picture units. This is most of what gets replaced in a Sunnyvale tract home.
Read the detailSliding Glass & Patio Door Replacement
Sliding, gliding, and multi-panel patio systems, including track, roller, and threshold work. The original 1970s slider is usually the worst-performing opening in the house.
Read the detailCustom & Specialty Shape Windows
Arches, half-rounds, octagons, trapezoids, and transoms built to a template we take off your actual opening.
Read the detailCommercial Storefront Glass Replacement
Aluminum storefront framing, tempered and insulated commercial glazing, and entry glass for small business properties along El Camino Real and Mathilda.
Read the detailWhat You Get That the Retail Installers Do Not
The big chains sell a window. We sell the opening it goes into, and the eight things below are where that shows up.
(408) 547-4680 — book your free measureA measure, not a sales appointment
Someone comes out, measures every opening, writes down what you have, and leaves you a number. It takes under an hour.
The number holds
Flat written pricing that does not change after the measure. The one exception is rot found behind the trim on removal, which we show you before we touch it.
Installation is the product
A good window installed badly performs worse than an average window installed correctly. We flash it, insulate the gap, and seal both sides. Every opening.
Both options on the table
If your frames are sound and only the glass failed, we will tell you that and quote the glass. We would rather do the smaller job honestly.
Glass matched to Climate Zone 4
Sunnyvale gets long dry heat and mild winters. Our default package targets solar heat gain, not the cold-climate spec a national chain ships everywhere.
In-house crews
Licensed, insured, background-checked, and on our payroll. Not a rotating subcontractor.
The paperwork is ours
The Sunnyvale building permit and the Title 24 compliance documentation, plus HOA submittals where your neighbourhood requires them.
The house is clean when we leave
Floors and landscaping protected, old units hauled away, glass swept and magnet-rolled.
Where We Work in Santa Clara County
We are based in Sunnyvale and stay inside the county on purpose. Crews run out along Lawrence Expressway, Central Expressway, and El Camino Real, which keeps drive time short and lets us come back the same week if a screen or a roller needs adjusting.
Sunnyvale neighbourhoods
Ponderosa, Cherry Chase, Birdland, Ortega Park, Raynor Park, Lakewood Village, the Heritage District, Washington Park, Fair Oaks, Lawrence Station
Adjacent cities
Mountain View, Cupertino, Santa Clara, Los Altos, Los Altos Hills, Palo Alto, Campbell
Wider county
San Jose, Saratoga, Los Gatos, Milpitas, Menlo Park, Monte Sereno
Cities we cover
- Sunnyvale
- Mountain View
- Cupertino
- Santa Clara
- Los Altos
- Palo Alto
- Campbell
- Saratoga
- San Jose
- Milpitas
- Los Gatos
- Menlo Park
Not sure whether your street is in range — ask and we will tell you straight.
(408) 547-4680See the full coverage mapWindow Replacement Questions We Get in Sunnyvale
Straight answers, including the two most competitors will not put in writing: what moves the price, and when you do not need a whole new window.
Something not covered here
(408) 547-4680Four things, in order: how many openings, the size of each one, the operating style, and the glass package. A standard-size slider is the cheapest thing in the catalog; a custom arch or a three-panel bay is the most expensive. Full-frame replacement costs more than an insert because there is tear-out and trim work. We will not quote a number over the phone, because a number given without a measure is a number that changes later.
One to three weeks from first call to a signed quote, then three to eight weeks while the units are manufactured to your openings. Installation itself is usually one to three days.
Eight to twelve standard openings for a two-person crew, fewer if there is stucco cutting, dry rot, or a bay to rebuild.
If the existing frame is square, sound, and dry, an insert keeps more of your wall intact and costs less. If the sill is soft, the frame is out of square, or there is water staining below the window, it has to come out to the rough opening. We tell you which after the measure, not before.
Yes, when the frame and hardware are sound and only the insulated glass unit failed. That is the fogged-glass case and it is a real, smaller job. We quote it honestly instead of upselling the whole window.
Two panes with argon between them slow heat moving through the assembly — that is the U-factor. The low-E coating reflects solar heat before it enters the room — that is the SHGC. In Sunnyvale the SHGC number matters more than most people expect, because the problem here is summer heat gain rather than winter heat loss.
Not for weather. Sunnyvale does not get wind-borne debris events. People here choose laminated glass for two other reasons: it is far harder to break through, and it noticeably reduces noise from 101, 237, and the expressways.
Two documents. The manufacturer covers glass, frames, and hardware under its own written terms. We cover the installation — flashing, sealing, insulation, and fit — under a separate written labor warranty. You get both in your paperwork.
Yes. Window replacement needs a City of Sunnyvale building permit and Title 24 compliance documentation. We pull the permit and prepare the paperwork. Where your HOA governs exterior appearance, we assemble the submittal package.
Sunnyvale is forgiving — there is no frozen ground and no hurricane season. Late winter and early spring have the shortest manufacturing lead times, because the industry's crush is late summer.
About us
A Sunnyvale Window Company, Not a Call Centre
We work one county. That means the estimator who measures your house has already seen your floor plan on three other streets, knows which tract used non-standard rough openings, and knows what the city inspector looks for.
Ask us anything — (408) 547-4680More about how we workYour Windows Are Not Going to Get Better on Their Own
Drafts, fog, and stuck sashes only move in one direction. Get a free in-home measure and a written number, then decide on your own schedule.
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