Window installation Sunnyvale CA homeowners take on usually involves three decisions: full-frame or retrofit, which material meets Title 24, and how to replace single-pane glass in Eichler and mid-century homes. The goal is to preserve the original architecture. Construction Remodeling in Bay Area (CRBA) has handled window replacement Sunnyvale projects since 2015. Every project comes with a fixed written price before work starts.
By Ray, Owner & General Contractor of Construction Remodeling in Bay Area · Last updated 31 August 2026
There’s no single number because retrofit inserts and full-frame replacements are different jobs. As a general Silicon Valley market range, vinyl replacement windows typically cost $600–$1,200 installed per opening. Fiberglass units usually cost more. They are better suited to the Bay Area’s temperature swings.
A whole-home project with 15–25 windows commonly costs $15,000 to $45,000+. The final price depends on the material and installation method.
Three things drive the price on any project:
CRBA gives every homeowner a free in-home consultation. You also receive a written, fixed-price quote before work begins. There is no phone estimate that grows after installation starts.
Any energy-efficient window installation Sunnyvale CA homeowners plan has to meet California’s Title 24 energy code. Sunnyvale falls within California’s Title 24 Climate Zone 4.
For full-frame window replacements of 75 square feet or more, the prescriptive standard requires a maximum U-factor of 0.30. The maximum solar heat gain coefficient (SHGC) is 0.23.
Smaller replacement projects have slightly relaxed thresholds. They allow a U-factor of 0.40 and an SHGC of 0.35. Single-pane glass does not qualify under either standard. New windows must be at least dual-pane.
Getting Title 24 compliant energy-efficient windows for a Sunnyvale home requires more than choosing a window from a shelf. The U-factor and SHGC ratings on the NFRC label must match your project.
CRBA prepares the required CF1R compliance documentation. The company also pulls permits through Sunnyvale’s Building Division. This means you do not have to handle the permit process yourself.
You also do not have to decipher the California Energy Commission’s Title 24 standards on your own.
Installation day itself moves fast — a straightforward retrofit window typically takes 30–60 minutes once the crew is on-site. The full timeline depends on scope. A whole-home retrofit project of 10–20 windows usually wraps in 1–3 days. Full-frame replacements, especially on Eichler homes where stucco or siding needs to be cut back and patched around each opening, can run 3–7 days including exterior finish work.
Permitting adds time before installation ever starts. A straightforward window-only permit through the City of Sunnyvale is typically simpler and faster than a full remodel permit, though Eichler full-frame projects that touch structural framing or exterior finishes can take longer to clear plan check.
Sunnyvale has one of the largest concentrations of Eichler homes in the country, and their original floor-to-ceiling single-pane glass in aluminum frames is the single biggest energy leak in most of these houses. Because Eichlers are post-and-beam construction, a full-frame window swap isn’t a simple swap-and-caulk job — the framing is structural, not decorative trim.
Done right, the new frame lines get matched to the home’s original post-and-beam grid so the Title 24 upgrade doesn’t visually fight the architecture. We’ve carried this approach through projects in Sunnyvale’s Fairbrae, Cherry Chase, Fairwood, Rancho Verde, and Fairorchard tracts — replacing single-pane glazing while keeping the low, horizontal sightlines that define the style.
Radiant slab heating, common under Eichler floors, is another reason to have a full-frame window contractor coordinate with whoever else touches the exterior walls during a project.
The honest answer: whoever gives you a fixed price in writing, pulls the permit and Title 24 paperwork themselves, and backs the work with a real warranty — not just the lowest bid. CRBA has installed replacement windows Silicon Valley homeowners depend on since 2015, with an in-house crew (no sub-out chaos), a 10-year workmanship warranty, and a 5.0-star rating across 200+ Google reviews. Windows are handled as part of our Home Remodeling and Exterior Remodeling services, alongside siding, doors, and full whole-home projects.
CRBA is CSLB Licensed #1095283 — verifiable directly on the state’s CSLB license lookup.
Frequently Asked Questions
What does window installation cost in Sunnyvale?
Vinyl replacement windows typically run $600–$1,200 installed per opening; fiberglass costs more. Whole-home projects of 15–25 windows commonly run $15,000–$45,000+, depending on material, count, and retrofit vs. full-frame scope. We confirm your exact number with a free in-home consultation.
What windows meet California Title 24 energy rules?
For full-frame replacements of 75 sq ft or more, windows need a maximum U-factor of 0.30 and SHGC of 0.23. Smaller projects allow U-factor 0.40 and SHGC 0.35. All new windows must be at least dual-pane — single-pane doesn’t qualify under either threshold.
Do new windows cut cooling bills in the South Bay?
Yes, especially on homes with large west- or south-facing glass. Title 24-compliant low-SHGC glazing reduces solar heat gain, which lowers the air conditioning load during Silicon Valley’s warm months — the effect is most noticeable on Eichler homes with extensive floor-to-ceiling original glass.
Can you replace Eichler/mid-century single-pane windows?
Yes. We treat Eichler window replacement as structural work, not trim work, matching new frame lines to the home’s original post-and-beam grid so the Title 24 upgrade doesn’t fight the architecture.
How long does a full window replacement take?
A retrofit project of 10–20 windows usually takes 1–3 days on-site. Full-frame Eichler replacements with exterior stucco or siding work can run 3–7 days. Permitting adds time beforehand, though window-only permits are typically faster to clear than full remodel permits.
Construction Remodeling in Bay Area handles window installation Sunnyvale CA homeowners can rely on — Title 24 compliance, permits, and Eichler-specific framing all included in one fixed, written quote. Call at (510) 990-9243, or visit our home remodeling service page or project portfolio to see completed work before you book your free in-home consultation.