Free in-home measure and quote - PGT, CGI and CWS impact lines compared on your actual openings, style by style
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AfterFast, Reliable Window Replacement Across San Francisco
Window replacement in San Francisco runs $850-$2,400 per opening for insert replacements and $1,600-$4,200 for full-frame work on most Victorian and Edwardian homes, with the final number driven by what we find when the old sash comes out. We know that sounds broad, and we’ll explain exactly why below. What matters up front is this: we put a written price in your hand before any work starts, and that price holds unless you approve a change in writing. Call (509) 265-6387 to schedule a measured survey.
We work throughout San Francisco daily, from the avenues of the Outer Sunset to the flats of Noe Valley and the hills of Russian Hill. Our crews know what a cantilevered bay window on a 1908 Edwardian should look like when it’s opened up, because we’ve opened hundreds of them. That’s the difference between a quote that survives contact with the wall and one that falls apart.
Why Sightline Windows & Doors Is San Francisco’s Preferred Window Replacement Company
San Francisco homeowners read the three-star reviews first, and we respect that. What they find on ours is a pattern: the price we wrote before the job is the price on the final invoice, and the photo record shows the work we actually did. Since 2012, Sightline has installed more than 18,000 windows and doors under the Haven Standard, and every one of those openings started with a measured survey the customer kept.
The Haven Standard isn’t a slogan here. It’s five clauses we can show you in writing: Have it in writing, Arrive on schedule, Verified crews, Evidence on every job, No surprises. Clause 1 is the whole point of this company. The measurement and the quote are the same document, and that document is yours to keep. If a final invoice ever differs from the written scope without a signed change order, the 365-Day Done Right Promise covers making it right.
Sonia Raman leads our San Francisco Bay Area operation, and the crew assigned to your job arrives background-checked, uniformed, and identified by license number before they step through the door. Haven Clause 3, Verified Crews, means the person on the record is the person at your house. Live phone coverage runs around the clock at (509) 265-6387, not a voicemail queue with a callback window.
Our Window Replacement Services in San Francisco
Full Frame Replacement
Full-frame replacement means the entire window comes out down to the rough opening: sash, frame, trim, sill. In San Francisco, this is where we find what the old house has been hiding. On a 1912 Edwardian flat in the Outer Sunset, our crew pulled an original double-hung sash whose sill was completely rotted on the street side while the interior paint looked untouched. Salt-laden fog had saturated the end-grain for decades. We replaced the full frame with a custom-milled period-correct wood window and wrote a change order for the rotted jamb and undersized framing once the stucco was open, all approved in writing before we touched it. A typical full-frame replacement in San Francisco runs $1,600-$4,200 per opening depending on what the rough opening reveals.
Insert Window Replacement
An insert, sometimes called a pocket replacement, fits a new window unit inside the existing frame. It’s the right call when the frame is structurally sound and we can prove it with moisture readings and a physical inspection of the sill end-grain. In neighborhoods like the Inner Richmond or Glen Park, where original fir frames are often salvageable, inserts run $850-$2,400 per opening and preserve more of the original interior trim. The risk in San Francisco specifically is the hidden rot pattern: what looks dry from the inside may be saturated on the street side. We check before we quote an insert, not after.
Window Maintenance & Care
The marine layer treats exterior wood differently than any other climate in the Bay Area. We offer maintenance programs that include documented photo records of sill, sash, and threshold condition every visit, because in neighborhoods like the Outer Richmond and Sunset District, you can’t see the failure coming from inside. We’ll tell you what we found, not what we felt about it: frame readings, sightline measurements, and hardware condition on paper. Maintenance visits run $180-$400 depending on the number of openings and the work performed.
Energy-Efficient Upgrade
Replacing single-pane wood sash with modern insulated glass upgrades changes the structural load on the opening. Double-pane units are heavier, and in San Francisco’s cantilevered bay windows, the corner posts and sub-sill aren’t always sized for that added weight. We evaluate the framing before we specify the glass, and we specify by performance tier: U-factor, SHGC, and air infiltration numbers on every written quote. This is also where Article 10 and 11 compliance matters most, since energy retrofits in historic districts still need to meet period-profile requirements. Energy-efficient upgrades in San Francisco generally run $950-$2,800 per opening depending on glass package and frame material.
What happens when you call
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A real person answersNo phone trees - you reach a local pro.
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You get an upfront price rangeHonest numbers before anyone is dispatched.
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A background-checked tech heads outLicensed & insured, dispatched right away.
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You approve before work beginsNothing starts until you say go.
BeforeAfterTrusted Brands We Service in San Francisco
We install from eight manufacturer lines and specify by what the opening requires, not by what’s in stock. For San Francisco’s temperate but moisture-heavy climate, we often specify ViewLux wood windows for period-correct replacements on Victorian and Edwardian homes, PGT for impact-rated glazing when clients want laminated glass, and CGI or CWS for coastal exposure on the western avenues. That list isn’t exhaustive. It’s just the lines we turn to most often here because they hold up against salt fog and keep the sightline profiles our neighborhoods’ design review boards expect. We stock weatherstripping, balances, and hardware for all eight lines locally, so maintenance parts don’t sit in a warehouse across the country while your window hangs open.
Common Window Replacement Problems We See in San Francisco Homes
- Salt fog saturation in western neighborhoods. The Pacific marine layer delivers salt-laden moisture to the Outer Sunset and Outer Richmond year-round. Wood sills and sashes rot from the exterior face inward while interior paint stays intact, so homeowners don’t know there’s a structural problem until the window is pulled.
- Unpermitted swaps that trigger stop-work orders. San Francisco Planning Department Articles 10 and 11 can prohibit standard vinyl or aluminum replacement windows entirely in historic districts and on designated buildings. Swapping windows without the right review can produce a stop-work order and a retroactive discretionary review that’s far more expensive than doing it correctly the first time.
- Undersized framing behind original single-pane sash. When modern double-pane insulated glass replaces century-old single-pane wood sash, the added weight corner-loads the bay window structure. Original framing from the 1880s to 1915 wasn’t sized for that load, and we regularly reinforce sub-sills and corner posts before installing the new unit.
- Failed waterproofing from quick flips. Many San Francisco properties bought between 2015 and 2025 had windows replaced without proper flashing or sill pan replacement. We find the evidence when we open the wall: water staining on the rough sill, rotted sheathing, and flashing that was never integrated into the WRB (weather-resistant barrier).
Pricing for Window Replacement in San Francisco, CA
Here are working numbers for San Francisco’s market, based on what we’ve actually quoted and installed across the city:
- Insert window replacement: $850-$2,400 per opening. Labor, flashing, and interior trim touch-up included in the written quote.
- Full-frame replacement: $1,600-$4,200 per opening. The spread accounts for what the rough opening reveals: rotted jamb repair, undersized framing reinforcement, and stucco or siding repair.
- Period-correct wood window (Article 10/11 compliant): $2,100-$5,500 per opening. Custom milling, matching profiles, and historic review documentation are part of the scope.
- Energy-efficient glass upgrades: $950-$2,800 per opening depending on glass package, U-factor, and SHGC targets.
- Maintenance and care visits: $180-$400 per visit, documented with a photo record of every opening inspected.
What moves the price in San Francisco is not the window unit itself. It’s what we find when the opening is exposed, and how much of the original framing is still doing its job. That’s why our quote is a written scope based on a measured survey, and any surprise we find after the wall is open gets priced and approved in writing before we touch it. The measurement and the quote are the same document. Call (509) 265-6387 for that survey and a written price. Estimates are free.
We Also Serve Cities Near San Francisco
Daly City and South San Francisco homes have a completely different planning context: no Article 10 or 11 review, fewer period-profile requirements, and different moisture exposure from the Colma gap. We work those markets too, and our Window Replacement team brings the same written-price-before-work standard across the county line. We also serve Alameda and Berkeley, where the housing stock shifts to 1920s and 1930s stucco bungalows with their own rot patterns and permit triggers.
Serving San Francisco, CA - Our Local Coverage Area
We’re based in the San Francisco area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
FAQs - Window Replacement in San Francisco
Because the original rough opening was built between 1880 and 1915, and the wood inside has had a century of fog, rain, and salt exposure to work against it. When we open the wall, we routinely find rotted sill plates, undersized corner posts, and flashing that was never integrated into the weather barrier. Any extra work is priced and approved in writing before we proceed, so the scope never runs away from you. Call (509) 265-6387 for a measured survey and a written scope.
In most cases, no. San Francisco Planning Department Articles 10 and 11 give discretionary review authority over exterior alterations on historic buildings and in designated districts, and standard vinyl or aluminum replacement windows are frequently prohibited. The path forward is period-matching wood profiles or a discretionary review application. We handle that documentation as part of the written scope, and we specify replacements that meet the profile, sightline, and material requirements your district’s guidelines set. We’ll tell you what’s likely to pass before you spend money on review.
Salt-laden fog from the Pacific marine layer saturates exposed wood end-grain on the street side of the building far faster than the interior face, and San Francisco never gets a prolonged dry summer to arrest that moisture. The exterior sill and sash can be fully rotted through while the interior paint is still intact and the window still operates. That’s why our maintenance visits include photo documentation of the exterior face of every opening, and why we physically pull test end-grain before quoting an insert.
We write a change order, price it, and get your written approval before we touch it. Haven Clause 5, No surprises, is written into our contracts: the scope cannot expand without a signed change order and a revised price in your hand. If you choose not to proceed with the additional work, we document what we found, button the opening back up, and you decide on your own timeline.
San Francisco requires a building permit for window replacement when the work alters the exterior appearance or structural components, and for any work on a building that falls under Articles 10 or 11 of the Planning Code. An insert replacement that preserves the existing frame and original exterior appearance may not require one, but in practice, most Edwardian flats in San Francisco do trigger permit review because the building itself is a designated resource or within a historic district. We determine the correct permit path before we write the scope, and the permit cost is included in the written quote.
Get a Written Price Before Any Work Starts
Window replacement in San Francisco is not a simple swap, and anyone who tells you otherwise hasn’t opened enough walls here. We hand you a measured survey you keep, a written price before any work starts, and a documented photo record when the job finishes. If you have a competitor’s written estimate, bring it to us for a free second opinion. Then call (509) 265-6387 to schedule your measured survey in San Francisco with a crew that can show you, in writing, what we’re going to do before we do it.
Written by Sonia Raman, Owner at Sightline Windows & Doors, serving San Francisco under the Haven Standard since 2012.
Window Replacement in Nearby Areas
