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AfterFast, Reliable Window Replacement Across Mission District
Window replacement in Mission District homes starts with a direct answer: most full-frame replacements in this neighborhood run $900-$2,400 per window, while insert replacements typically land between $650-$1,500 per opening. The range depends on what our crew finds when the old sash comes out, because Mission District Victorians and Edwardians almost never give up a window without showing us what’s hiding behind it. If you’re on 24th Street, near Dolores Park, or over by Garfield Square, we know the housing stock and we know what those cantilevered bay windows do after a hundred years of sun and marine air. Call (888) 635-0804 for a free estimate, and we’ll send a uniformed technician who measures every opening twice before quoting you a price in writing.
Our Window Replacement team works Mission District blocks from Valencia Street to Potrero Avenue, and we’ve pulled enough original single-pane sashes out of these flats to know that no two openings are alike. We don’t quote over the phone. We come out, we look, we show you what’s under the trim, and then we give you a number you can plan on.
Why TruePane Windows & Doors Is Mission District’s Preferred Window Replacement Company
Dale Kessler founded TruePane Windows & Doors in 2008 out of a simple rule that still governs every install: if the pane is not true, the job is not done. That rule came from watching too many Mission District homeowners get stuck with out-of-square windows, voided warranties, and contractors who didn’t answer the phone after the check cleared. We’re not a franchise. We’re glaziers, and we’ve spent years in the trade learning how older San Francisco buildings actually behave.
Mission District customers call us because we show up when we say we will, in uniform, background-checked, and ready to talk through options on paper. We quote manufacturer lines side by side, so you see exactly what you’re buying and what it costs before you sign. When a job on a three-unit flat near 24th and Harrison turned up rotted cantilever framing behind the original bay sashes, we didn’t hide it or pad the bill. We pulled the homeowner aside, showed them the rot extending into the subfloor, wrote a change order, and got approval in writing before we touched it. That’s how we work. A live person answers our phone 24 hours a day, seven days a week, and that person has the authority to schedule your estimate, not just take a message.
We are an authorized installer for more than a dozen manufacturer lines including, PGT, and CGI. And we back every job with the Done Right Promise: if it is not done right, we make it right. No paperwork fights, no arguing.
If you’re looking for Window Replacement in Mission District, you’re not shopping for the cheapest bid. You want it done once, correctly, by a company that will still be here in thirty years. That’s us.
Our Window Replacement Services in Mission District
Mission District homes demand more than a standard window swap. Tight rowhouse spacing, ornate wood surrounds, cantilevered bay assemblies, and original single-pane glass all turn a routine replacement into a craft project. Here are the services our crews perform most often in this neighborhood.
Full Frame Replacement
Full frame replacement means the entire window assembly comes out, down to the rough opening, and a new unit goes in with new waterproofing, flashing, and interior trim. In Mission District flats built between the 1890s and 1910s, this is where we most often find the problems you can’t see from the room: undersized framing, dry rot in the sill, and original rough openings that were never square to begin with. Because Twin Peaks blocks the ocean fog, south- and west-facing Mission window frames get more direct sun and thermal cycling than identical windows in the Sunset or Richmond, so the surrounding framing dries out, shrinks, and gaps faster. A full-frame job lets us correct all of it. Pricing for a typical Mission District full-frame replacement runs $900-$2,400 per window, depending on size, access, and what we find once the opening is exposed.
Insert Window Replacement
Insert replacement leaves the existing frame in place and installs a new sash and glass unit inside it. For Mission District homeowners who want to keep their original wood trim and avoid disturbing lead paint, this is often the more practical path. We measure every opening twice, order custom-sized inserts, and set them square against the existing jamb. A typical Mission District insert runs $650-$1,500 per window. The catch with older flats: if the original frame has hidden rot or the sashes were never true, an insert may not perform. We’ll tell you before you spend the money.
Storm Window Replacement
Many Mission District Victorians and Edwardians still rely on exterior storm windows to supplement original single-pane sash. When those storms warp, fog, or lose their weatherstripping, the interior window becomes the only barrier against marine air and street noise from Valencia or Mission Street. Storm window replacement runs roughly $350-$800 per unit installed, depending on size and hardware. We also assess whether the original sash behind the storm is worth saving or whether an energy-efficient insert would do the job better.
Energy-Efficient Upgrade
Replacing century-old single-pane glass with low-E, argon-filled double-pane units changes the comfort level of a Mission District flat within a week. South-facing exposures near Dolores Park get hammered with sun all afternoon, and old glazing compound fails faster here than anywhere else in the city. We install energy-efficient windows from PGT, CGI, and other authorized lines, and we register both manufacturer warranty layers in writing before our truck leaves the driveway. A typical energy-efficient replacement in Mission District lands between $800-$1,900 per window, with the higher end reserved for custom-size openings on upper-story bay assemblies.
Historic Window Restoration
If your Mission Victorian still has its original wood sashes, and you want to keep them, we mill custom Douglas fir to match the surviving profiles and rebuild the sash as needed. This is slower work, and it costs more than a tear-out replacement, but it keeps the character architects and planning reviewers want to see on these blocks. Restoration typically runs $1,200-$2,800 per window, and includes lead-safe practices on any component that tests positive. We’ll help you decide when restoration is worth it and when a high-quality insert delivers better performance for less money.
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.
Trusted Brands We Service in Mission District
We’re authorized to install and service windows from more than a dozen manufacturers, including PGT, CGI, and CWS. That matters in Mission District because we can order exact-size replacements for non-standard Victorian and Edwardian openings without waiting on an outside supplier to figure out what you need. We keep common hardware, weatherstripping, and balance parts for these lines in our Bay Area inventory, which means faster turnaround when a sash stops holding or a lock fails. When you call us for service, we show you side-by-side quotes from multiple manufacturers on paper, so you can compare glass packages, frame materials, and warranty durations before committing. We register both warranty layers in writing, every time, before the truck leaves the driveway.
Common Window Replacement Problems We See in Mission District Homes
- Rotted cantilever framing hidden behind bay sashes. On a three-unit Edwardian flat near 24th and Harrison, our crew removed the original single-pane sashes from a south-facing cantilevered bay window and found the lower cantilever framing had rot extending into the subfloor, the result of years of failed caulk and marine air intrusion. We stabilized the framing, milled custom Douglas fir sashes, installed double-hung inserts with low-E glass and argon fill, and flashed the entire bay assembly with new waterproofing before reinstalling the ornate exterior trim. Contractors unfamiliar with Mission District construction routinely underbid these jobs because they haven’t seen what’s behind the trim.
- Undersized replacement windows with wide perimeter gaps. Older flats often received “standard size” replacement windows that don’t match the original rough openings. The gaps get sealed with backer rod and caulk, which fails within a few seasons and lets air and moisture into tightly spaced Mission District buildings. We measure and order to the actual opening, not the nearest stock size.
- Lead paint on original glazing putty and frames. Most pre-1978 Mission District windows carry lead paint, and scraping or sanding it triggers RRP rules. We use lead-safe work practices on every job where testing confirms the presence of lead, and we’ll walk you through what that means for containment and cleanup before work starts. Surprises mid-project happen when a crew without that training gets flagged by an inspector and has to stop work. We plan for it from the first visit.
- Failed glazing compound from UV and thermal cycling. Because Twin Peaks shields the Mission from westerly ocean fog, south- and west-facing wood sash windows experience far more UV exposure and daily temperature swings than identical windows in fogged-in districts. Old glazing putty dries, cracks, and falls out, which lets air infiltrate and accelerates frame rot. Periodic resealing is a recurring necessity here, not a one-time fix.
Pricing for Window Replacement in Mission District, CA
You should know what to expect before the first call. In Mission District, full-frame replacement generally runs $900-$2,400 per window. Inserts come in at $650-$1,500. Storm window replacement lands around $350-$800 per unit. Historic restoration, where we mill custom sashes to match originals, runs $1,200-$2,800 per window. Energy-efficient upgrades with low-E and argon fill span $800-$1,900 per opening. These are real ranges based on jobs we’ve priced and completed in this neighborhood, not national averages.
What moves the price on a Mission District job: whether it’s a flat street-facing window or an upper-story cantilevered bay, whether the rough opening is square or has shifted over a century, whether lead paint is present, and whether the original frame is salvageable. We write all of that into a line-item quote before we start, and any change order gets priced and approved in writing before our crew touches it. Call (888) 635-0804 for a free estimate. Seniors and veterans receive a permanent 5% discount, and we offer a free written repair estimate.
We Also Serve Cities Near Mission District
Our crews regularly work in Parkway, Arden-Arcade, Ladera Heights, and Commerce, applying the same Mission District-caliber craftsmanship to homes throughout the surrounding area. If you’re just outside the neighborhood and need window replacement done by a team that understands older Bay Area housing stock, call us at (888) 635-0804. We’ll schedule a free estimate at your property and show you exactly what you’re paying for, on paper, before any work begins.
Serving Mission District, CA - Our Local Coverage Area
We’re based in the Mission District 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 Mission District
Mission District bay windows are structurally cantilevered assemblies with multiple angled sash units, not simple rectangles set flat into a wall. The entire bay projects outward from the building and carries weight through the cantilevered floor framing below it. That framing is often original to the 1890s or 1910s, and decades of sun exposure and marine air intrusion rot it in ways that a flat-wall window never experiences. Replacement requires inspecting and often repairing that structural framing, flashing the transitions between sash units, and custom-milling sashes to match the existing angles. In the Sunset, where fog keeps temperatures cooler and framing drier, a standard flat replacement is usually sufficient. In the Mission, that same approach fails fast. Call (888) 635-0804 and we’ll explain what your specific bay window needs.
The inspector will look at the exposed rough opening, the surrounding framing, the waterproofing membrane, and the new window’s flashing details. If the original glazing putty or frame components test positive for lead, the inspector will confirm that lead-safe containment is in place before work continues. If the surrounding framing shows rot or inadequate support, the inspector may require corrective framing work before the window can be reinstalled. That’s the moment a budget gets blown by a contractor who didn’t plan for it. We write allowances into our Mission District contracts for exactly this, and every change order gets priced and approved in writing before we proceed. Our work passes inspection because we build to code, and we pull permits on every job that requires one.
Frequently, yes. We can replace the moving sashes themselves while keeping the original frame, a service that preserves your Victorian trim and avoids disturbing lead paint in the surrounding material. We measure the existing frame, mill or order custom sashes to match the original profiles, and install new weatherstripping, balances, and locks. If the frame itself has rot or the rough opening is badly out of square, we’ll show you photos and recommend either a targeted repair or a full-frame replacement. For a Mission District double-hung, sash-only replacement typically runs $600-$1,400 per window. Call (888) 635-0804 to schedule an inspection.
We test for lead on every Mission District window replacement where the home was built before 1978, which covers nearly all of this neighborhood’s housing stock. If lead is present, our crew follows lead-safe work practices: containment barriers, HEPA filtration, wet scraping where feasible, and proper disposal of all removed materials. We don’t sand or grind lead paint into the air, and we don’t let chips fall through the wall cavity. The homeowner is informed before work begins, and we build lead-safe labor and disposal costs into the initial quote so there’s no mid-project surprise. If a permit-triggered inspection flags peeling paint on window components, we’re already prepared for it.
Condensation between panes means the glass unit’s seal has failed and the insulating gas has escaped. The glass unit, also called an IGU, does need to be replaced, but the surrounding frame may be perfectly fine. In many Mission District cases we can replace just the failed glass unit, often for $350-$700 per window, without disturbing the original trim or triggering a structural inspection. If the frame itself is compromised, or if the seals have failed on multiple units in the same bay, a full sash or insert replacement may make more long-term sense. We’ll show you the failed unit and explain your options on paper before you decide. Call (888) 635-0804 for a free estimate.
Written by Dale Kessler, Owner at TruePane Windows & Doors, serving Mission District and the greater San Francisco Bay Area since 2008.