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AfterFast, Reliable Window Installation Across San Francisco
Window installation in San Francisco typically runs $900-$2,400 per window for a standard retrofit, while full-frame replacements in older homes range $1,800-$4,500 per opening once rot repair and historic-district compliance are factored in. Most jobs in the city’s Victorian and Edwardian housing stock take one to three days per opening, not the single afternoon a newer suburban home might allow. If you’re calling about a fogged double-hung in the Outer Sunset or a sagging bay window in Noe Valley, we know exactly what your building is doing before we even park the truck. Call (888) 635-0804 and a live person answers, any hour.
Why TruePane Windows & Doors Is San Francisco’s Preferred Window Installation Company
We work in San Francisco the way the city’s older buildings demand: slowly enough to see what’s actually happening inside the wall, and carefully enough to keep the Planning Department out of your hair. Dale Kessler founded TruePane in 2008 after a career spent watching installers slap vinyl units into Victorians and walk away from the warranty three years later when the seals failed. That is not how we operate. Every San Francisco job gets measured twice, quoted side by side on paper so you see exactly what each manufacturer line costs, and backed by our Done Right Promise in writing. If the pane is not true, the job is not done.
Our crews know the specific failure patterns of this city’s housing stock. We know that a bay window assembly in the Castro is load-bearing and historically protected, not a cosmetic add-on. We know that Outer Richmond fog eats aluminum hardware the way inland heat never will. And we know that many San Francisco homeowners have been burned once by a contractor who quoted over the phone and disappeared when the rot showed up. We quote in person, in writing, and we stand behind it. Uniformed, background-checked technicians. A live person on the phone 24/7. Years of community service through the Kessler family’s glazing heritage, and we plan to be in San Francisco another thirty.
A Done Right Promise That Means Something
Most installation warranties read like they were written by a lawyer who never held a level. Ours is different because Dale wrote it himself, and he kept it short. If the work is not done right, we make it right. No paperwork fights, no arguing, no fine print that covers neither the sash nor the sill. The Keystone Standard means both manufacturer warranty layers get registered in writing before our truck leaves your driveway. You’ll know the exact duration of every component warranty, and you’ll have it on paper, not in a verbal promise that evaporates after closing.
Our Window Installation Services in San Francisco
San Francisco homes are not interchangeable, and neither are their windows. A Marina District condo has different water-intrusion challenges than a Sunset bungalow, and a Western Addition Victorian has historic review requirements a Mission Bay high-rise will never face. Here are the installations we do most often across the city, and what San Francisco specifically throws at each one.
Casement Windows
Casement windows in San Francisco run $1,100-$2,800 per opening installed, depending on whether we’re doing a retrofit into a plumb existing frame or a full replacement with new casing. These windows crank outward on side hinges, which makes them ideal for catching the west wind off the Pacific in the Outer Richmond and Outer Sunset. A quality casement with compression gaskets seals tighter against the fog than a sliding window ever will, and that matters when your building sits in the marine layer 200 days a year. We install casements from CWS and ES Windows for San Francisco homeowners who want the bay breeze without the fog dripping through the gaps.
Awning Windows
Awning windows hinge at the top and open outward from the bottom, which lets you vent a bathroom or kitchen during a drizzle without letting the rain in. In San Francisco’s wet neighborhoods like the Sunset and Parkside, these are the workhorse window above sinks and below eaves. Expect $850-$2,200 per opening installed. The trick in older flats is setting the operator hardware so it opens properly under eave clearance that was measured 90 years ago. We probe every opening before we price, because an original fir frame that looks solid from inside may be soft on the weather side.
Fixed & Picture Windows
A fixed or picture window in San Francisco typically costs $700-$2,000 installed for a retrofit, more for a full-frame replacement in a wall with existing water damage. These windows don’t open, which means they’re pure glass and framing, and they live or die on the quality of the flashing around them. In a city where winter storms drive rain sideways into west-facing walls, a poorly flashed picture window becomes a slow leak into the subfloor. We use continuous butyl flashing tape on every fixed window install, not step flashing, because the first winter will test it.
Single & Double Hung
Single and double hung windows are the classic choice for San Francisco’s original building stock, and they run $950-$2,600 per opening installed depending on material and condition of the rough sill. Most Victorians and Edwardians in the Castro, Mission, and Noe Valley were built with original wood double hungs, and many are in designated historic districts where the Planning Department effectively prohibits vinyl replacements. Wood or wood-clad units from Marvin, Andersen, or CWS are the standard for these jobs. We measure every opening twice, because a 1910 rough opening is rarely square, and a window that’s out of true by even a quarter inch will bind and leak within a season.
We also install sliding windows, bay and bow windows, and garden/basement windows, and we’ll talk you through the tradeoffs of each for your specific San Francisco building before you commit to anything. Call (888) 635-0804 for a free estimate, or read more about our Window Installation process.
What happens when you call
- 1
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.
Trusted Brands We Service in San Francisco
TruePane is an authorized installer for more than a dozen manufacturer lines, including, PGT, CGI, and ES Windows. For San Francisco’s climate, we most often quote CWS, CGI, and ES Windows side by side on paper so you see the actual price difference and what it buys you in glass, frame, and warranty terms. CWS makes a wood-clad unit that holds up well against salt-laden fog. CGI manufactures impact-rated windows that handle coastal exposure and meet stringent wind-load requirements. ES Windows offers thermally broken aluminum that resists the corrosion we see on cheap aluminum frames throughout the Sunset and Richmond. We stock parts locally for our most-installed brands, which means a sash replacement or hardware fix does not sit in a warehouse queue for two weeks while your fogged window gets worse.
Common Window Installation Problems We See in San Francisco Homes
- Exterior sill rot that hides behind intact interior paint. The persistent fog in the Outer Sunset and Outer Richmond keeps exterior wood damp for months at a time, and the rot often starts on the weather face while the interior side still looks fine. We probe every sill and rough sill with an awl before pricing, because guessing wrong means a blowout change order later.
- Insulated glass units that fail from salt exposure. Salt-laden air from the Pacific and the Bay corrodes aluminum hardware and degrades IGU seals faster than inland Bay Area cities experience. A cheap retrofit in a fog-belt flat can cloud within five years. We specify glass systems rated for coastal exposure on every San Francisco job.
- Bay window assemblies that are load-bearing, not decorative. On nearly every block in the Castro, Mission, Western Addition, and Noe Valley, those protruding bay windows are structural. Replacing one means temporarily supporting the opening from below, custom sizing the unit, and re-flashing the entire assembly as a continuous system. A standard flat-wall replacement approach fails here, and the first winter storm proves it.
- Historic district rules that stop a vinyl swap cold. Many San Francisco neighborhoods fall under the Planning Department’s Article 10 or Article 11 rules, which effectively require wood or wood-clad windows in designated buildings. We know which districts require what, and we handle the historic review paperwork before the first window gets ordered.
If you’re searching for Window Installation in San Francisco, the best first step is a walking inspection of the actual openings in your building, not a phone quote based on a guess. That’s where hidden rot, undersized framing, and code triggers show themselves, and where we can write pricing that holds.
Pricing for Window Installation in San Francisco, CA
Window installation in San Francisco costs more than in Fremont or Concord because the housing stock is older, the rot patterns are more aggressive, and the regulatory layer is thicker. A typical retrofit double hung runs $950-$2,600. A bay or bow window replacement runs $3,500-$9,000 per assembly, with custom sizing and flashing work included. Full-frame replacements with rot repair and historic review typically range $1,800-$4,500 per opening. Casement windows run $1,100-$2,800, awnings $850-$2,200, and fixed or picture windows $700-$2,000.
What changes the price: the condition of the rough sill, which we test with an awl; the presence of knob-and-tube wiring in the adjacent stud bay, which a permit can force us to address; and whether the building sits in a designated historic district requiring wood or wood-clad units. We write these as allowances into the contract before work starts, and any surprise is priced and approved in writing before we touch it. Call (888) 635-0804 to schedule your free estimate. The number on the quote is the number on the bill.
| Window Type | Typical San Francisco Installed Cost |
|---|---|
| Fixed / Picture | $700 - $2,000 |
| Awning | $850 - $2,200 |
| Single / Double Hung (retrofit) | $950 - $2,600 |
| Casement | $1,100 - $2,800 |
| Full-Frame Replacement (with rot repair) | $1,800 - $4,500 |
| Bay / Bow Assembly | $3,500 - $9,000 |
We Also Serve Cities Near San Francisco
Our crews work throughout San Francisco and into the surrounding peninsula and North Bay. We serve Daly City, South San Francisco, and Alameda regularly, and take jobs across the Golden Gate in Sausalito. If you live just over the county line, call (888) 635-0804 and we’ll tell you honestly whether your job falls in our service area and when we can get a crew there.
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 Installation in San Francisco
San Francisco requires a permit for any window replacement that changes the size of the opening or involves structural repair to the rough sill or framing. A like-for-like retrofit within the existing frame may not need one, but if rot repair exposes damaged framing, or if the building is in a designated historic district, the permit process comes into play regardless. What triggers a code upgrade? The two most common triggers on San Francisco jobs are knob-and-tube wiring in the adjacent stud bay, which current code requires us to address once the wall is open, and smoke-detector or egress requirements that apply when the opening size changes. We budget for these as written allowances and handle the permits ourselves. Call (888) 635-0804 for an exact read on your building.
Because the fog never stops. The marine layer sits on the west side of San Francisco for much of the year, and it keeps the exterior face of a fir sill damp for months at a stretch. The interior side stays warm and dry, so paint holds and the wood looks intact from indoors. Meanwhile, the exterior face of the sill is slowly turning to sponge. The cold-moisture rot pattern is unique to fog-bound neighborhoods like the Outer Sunset and Outer Richmond, and it is why we probe every sill with an awl before pricing. A sill that passes the probe test is fine. One that sinks under the awl means structural work, and we write it into the estimate before you commit.
Generally no. Many of San Francisco’s designated historic districts, including large portions of the Castro, Mission, and Western Addition, operate under preservation rules that effectively prohibit vinyl replacement windows and require wood or wood-clad units instead. The San Francisco Planning Department’s historic preservation standards are specific about materials, profiles, and sightlines, and a contractor who does not know the difference will get you a stop-work order. We quote compliant materials on any building with historic protections, and we handle the review paperwork. Call (888) 635-0804 and we’ll tell you what rules apply to your building before you spend a dollar.
The rough sill underneath the bay window assembly. On a 1912 Edwardian flat in Noe Valley, our crew opened the wall around a leaking bay window and found the rough sill so rotted that the sash had dropped a quarter inch, plus knob-and-tube wiring in the adjacent stud bay. That is not a rare find in San Francisco. It is the normal condition of a 100-year-old opening that has been leaking slowly behind the trim for decades. We wrote the structural repair and wiring upgrade as a written change order before touching it, then installed a custom wood-clad Marvin double-hung with low-E glass and argon fill, re-flashed the entire bay with continuous butyl flashing tape, and passed the Planning Department’s historic review with zero pushback. The surprise costs on these jobs are rot repair, wiring remediation, and historic compliance. We price all three as allowances up front.
If the frames are square, the sills pass the awl test, and the insulated glass units are the only thing that failed, new sashes are often enough, and we’ll tell you that. The test is simple: open the window and check whether the sill has any soft spots on the exterior face, whether the frame pulls away from the wall when you push on it, and whether the glass has visible condensation between the panes. In San Francisco’s fog belt, seal failure from salt-laden air is common, but the frames themselves may still be sound. If you’re on the fence, call (888) 635-0804. We’ll send a technician who will tell you honestly whether the opening needs surgery or just new glass, and quote it both ways so you can decide with real numbers.
Ready to Talk Windows? Call TruePane
If you live in San Francisco and you’re tired of fogged glass, binding sashes, or a bay window that lets the winter storm into the subfloor, call (888) 635-0804. A live person answers, day or night. We’ll schedule a free estimate, send a background-checked technician who measures every opening twice, and give you a written line-item quote with both warranty layers registered before the truck leaves your driveway. Dale Kessler’s rule is still on the whiteboard after years of the Kessler family in glass: if the pane is not true, the job is not done. We stand behind it.
Written by Dale Kessler, Owner at TruePane Windows & Doors, serving San Francisco with a second-generation glazier’s standard for craftsmanship and straight dealing.