Window Replacement in San Francisco - Written Price Before Anything Is Ordered

Fast, Reliable Window Replacement Across San Francisco

Replacing windows in San Francisco usually runs between $900 and $2,800 per opening, depending on whether you need a sash-only repair, a full-frame replacement, or a historically compatible wood unit. Most jobs in the city take one to two days per window once parts arrive, and scheduling in neighborhoods like the Sunset, Richmond, Noe Valley, and the Mission is straightforward for our local crews. If you’re weighing a glass-only fix against a full replacement, call (562) 478-8017 and we’ll walk you through what your specific home actually needs. No guesswork, no pressure, just a written price before anything gets ordered.

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What makes window work different here isn’t the glass itself, it’s the house the glass sits in. San Francisco’s Victorians and Edwardians were built before modern flashing, before insulated glazing, and long before anyone imagined marine fog as a structural threat. We open walls and find what’s behind them. That’s the job.

Why Lightwell Windows & Doors Is San Francisco’s Preferred Window Replacement Company

Our crews work in San Francisco neighborhoods every week, from the fog-heavy Outer Sunset to the historic row houses of the Western Addition. We know what the Planning Department will ask for before you file, which saves homeowners weeks of back-and-forth. Keith Yamada, who leads our team, has walked enough of these jobs to know that a window quote on a 1905 Edwardian is rarely just about the window. The framing, the sill, the counterbalance, the flashing, all of it matters.

We’re part of the Cedarwell network and have operated to the Cedarwell Care Promise since 2010. Every job gets a written price before work starts. Every crew member is background-checked and uniformed. And every visit ends with shoe covers off at the door, drop cloths rolled up, and a photo of the clean-up before we leave. If it’s not done right, the 365-Day Done Right Promise means we make it right. No countdown, no debate.

When you call (562) 478-8017, a live person answers. Not a recording, not a callback queue. If something feels off with an install at 9pm, you reach a human who can help.

San Francisco homeowners deserve a Window Replacement team that treats a 1900s row house like a home with history, not a generic job site.

Window Glass Replacement in San Francisco

Window Glass Replacement in San Francisco typically costs $350 to $900 per sash when the existing frame and counterbalance are still sound. This is the right fix when fog-driven moisture has etched or failed a seal in an otherwise healthy wood sash, or when a single pane has cracked but the jamb, sill, and weights are intact. In the Outer Richmond and Outer Sunset, we see double-pane units fail more often than elsewhere in the city because constant marine moisture works its way into the sealant edge.

Fog-Seal Failures on West-Facing Sashes

West-facing windows in the fog belt take the brunt of San Francisco’s dampest air. The seal between panes fails slowly, sometimes showing only a faint interior haze for months before condensation becomes obvious. If the sash itself is still square and the counterbalance works, a glass-only replacement restores the view and the insulation without touching the historic profile.

Single-Pane Upgrades on Original Wood Sash

Many Victorians still run original single-pane glass. Replacing just the glass with a modern low-E insulated unit can cut drafts dramatically, but only if the wood rails and stiles are sound enough to carry the added weight. We inspect the joinery first. On older sashes with cracked rails or failing glue joints, glass alone won’t hold, and we’ll tell you that before you spend a dollar.

Window Sash Replacement in San Francisco

Window Sash Replacement in San Francisco runs between $700 and $1,900 per sash when we’re replacing the operable wood or composite sash but keeping the original frame and jamb. This is the most common fix on Victorian and Edwardian homes where the rope-and-pulley counterbalance has seized or snapped, but the surrounding frame is still structurally sound. In districts like the Castro and Haight-Ashbury, sash replacement often satisfies historic review when a full vinyl insert would be rejected outright.

Rope-and-Pulley Counterbalance Repair

Original counterbalance systems on double-hung windows fail after decades of marine moisture cycling through the weight pockets. The rope rots, the pulley seizes, and the sash either won’t stay up or won’t open at all. Replacing the sash and rebuilding the counterbalance with modern hardware preserves the original look while making the window operate like it did in 1910.

Rotted Sill Plates Underneath the Sash

Here’s what we tell every San Francisco homeowner before we open the jamb: the sill plate under an original wood sash may be rotted clear through, even when the interior paint looks fine. Moisture drives inward from outside, so the damage you can feel as a draft is often just the visible edge of a bigger problem. We photograph everything once the sash is out and give you a written change order before any carpentry gets added.

Trusted Brands We Service in San Francisco

We carry and service a focused line of window brands that fit the city’s housing stock. For exposed, fog-facing elevations we often recommend PGT or CGI impact-rated units built for marine conditions. For historic wood-sash replacements where the Planning Department requires profile matching, CWS and ViewLux offer wood and wood-composite options that hold a true period line. We stock local parts and coordinate delivery to San Francisco so a sash replacement on a Haight-Ashbury Victorian doesn’t wait on a cross-country freight schedule. The brand follows the house, not the other way around.

Common Window Replacement Problems We See in San Francisco Homes

• Rotted sill plates hidden behind intact interior paint. West-facing windows in the Outer Sunset and Outer Richmond trap fog moisture inside the rough opening. By the time you feel a draft, the sill plate and sometimes the rough framing are already compromised. We open the jamb first, photograph the damage, and price the carpentry in writing before reinstalling anything.
• Seized rope-and-pulley counterbalances on original double-hungs. After 80 to 120 years of moisture cycling, the rope rots and the pulley freezes. Homeowners notice the sash won’t stay up or the window won’t open at all. This almost always triggers a sash replacement, and in historic districts, a profile-matched wood sash rather than a vinyl insert.
• Steel casement corrosion in Sunset and Richmond stucco homes. Post-WWII houses in these neighborhoods shipped with steel casement or jalousie windows. Salt-laden fog air rusts the hinges and frames until the window won’t close tight. Standard vinyl replacements rarely fit the original openings without significant framing work, so we measure carefully before recommending anything.
• Historic district review rejecting off-the-shelf replacement profiles. Homeowners in the Western Addition, Haight-Ashbury, and parts of the Mission sometimes order windows before checking with Planning. When the profile gets rejected, they’re stuck with units they can’t install. We check the district requirements before you order anything.

Pricing for Window Replacement in San Francisco, CA

We Also Serve Cities Near San Francisco

Our crews handle San Francisco neighborhoods daily, and we regularly take on jobs in Daly City, Brisbane, Sausalito, and South San Francisco. The fog, the housing stock, and the permit layer shift slightly city to city, but the way we work doesn’t: inspect first, price in writing, clean up like it’s our own home.

FAQs About Window Replacement in San Francisco