Free in-home measure and quote - PGT, CGI and CWS impact lines compared on your actual openings, style by style
Fast, Reliable Custom Windows & Doors Across Corte Madera
Custom Window Replacement in Corte Madera and door work usually costs between $1,800 and $12,000 per opening depending on size, frame material, and what we find once the old unit comes out. The older ranches in the eastern flats, the ones built in the 1950s and 60s, rarely give up a window without revealing something underneath: undersized rough openings, rotted sill plates, failed flashing that let bay moisture work its way in for decades. Our crews have worked Corte Madera’s 94925 zip code long enough to expect it, plan for it, and price it honestly before we open the wall. If you’re looking at fogged glass, seized sliders, or doors that bind every summer, call (888) 635-0804 and we’ll walk the job with you.
We’re Custom Windows & Doors specialists, not a general handyman outfit that happens to hang a sash now and then. That matters on Corte Madera’s bay-side streets, where salt air and fifty-year-old framing turn a simple swap into structural work. Our team serves Corte Madera directly, with scheduling coordinated from our San Francisco Bay Area office and crews dispatched locally. A live person answers the phone every time you call, day or night.
Why TruePane Windows & Doors Is Corte Madera’s Preferred Custom Windows & Doors Company
Dale Kessler founded this company in 2008 on a rule he still keeps on the whiteboard: if the pane is not true, the job is not done. That rule governs every install we do in Corte Madera, and it’s the reason homeowners in the eastern flats and the hills above Tamalpais Drive keep calling us back. We’re not a franchise. We’re a second-generation glazier’s shop with years of craft tradition behind it, and we hire local, train apprentices into journeymen, and act like a company that plans to be here in thirty years.
What does that look like on your job? A background-checked, uniformed technician who measures every opening twice before ordering anything. A written quote that shows manufacturer lines side by side on paper, so you see exactly what you’re buying and what it costs. Both warranty layers registered in writing before our truck leaves your driveway, with durations stated plain. And a Done Right Promise that says if something isn’t right, we make it right, no paperwork fights.
Corte Madera customers get the same standard we bring everywhere: upfront pricing with no change orders unless you approve them in writing first, and most jobs completed in a single visit. The homes here were built to weather a different era, and the bay has been working on their frames the whole time. We know what to look for because we’ve been looking at it for decades.
Our Custom Windows & Doors Services in Corte Madera
Custom Shape Windows
Mid-century Corte Madera homes lean heavily on rectangle sliders, but plenty of ranchers and split-levels have eyebrow windows, radius tops, or trapezoid glass over fixed transoms. Stock sizes won’t touch those openings. We order custom shape windows cut to the exact rough opening, framed for Title 24 compliance in Climate Zone 3, and set with the same flashing discipline we use on a standard double-hung. In Corte Madera, custom shape work typically runs $2,200 to $7,500 per window depending on glass type and frame material.

Commercial Storefront Glazing
The retail frontage along Tamalpais Drive and the Town Center sees the same salt air as the residential streets, and aluminum storefront systems take a beating. We handle commercial storefront glazing for Corte Madera businesses that need code-compliant tempered glass, new framing, or full storefront replacements around existing tenant operations. Most of these jobs get quoted per linear foot after we measure the openings, and we schedule around business hours so you’re not dark when you shouldn’t be.

Curtain Wall Systems
Larger commercial and mixed-use buildings in Corte Madera, especially the newer office clusters near Highway 101, depend on curtain wall systems for daylight and thermal performance. When those systems leak or the thermal breaks fail, the fix isn’t caulk. We survey the elevation, identify failed glazing units and gaskets, and replace what’s actually broken rather than papering over it. Curtain wall work is always quoted after a site inspection, and we pull the permits and file the Title 24 performance reports the Marin County building office requires.

Architectural Grilles & SDLs
Some Corte Madera homeowners want the look of divided light without the upkeep of true muntins. Architectural grilles and simulated divided lites (SDLs) go between the glass panes of an insulated unit, or over the surface for a traditional profile. The choice depends on the home’s style, the exposure to sun and salt, and whether the window carries a structural load. We spec grilles in materials rated for marine environments, because painted aluminum here shows pitting within a decade. Expect $140 to $400 per window for SDL upgrades on a typical Corte Madera ranch.

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 Corte Madera
We’re an authorized installer for more than a dozen manufacturer lines, and in Corte Madera we most often spec Marvin for fiberglass frames that hold up to salt air, ES Windows for modern aluminum with thermally broken profiles, and CGI for Impact Windows & Doors in Corte Madera where wind load and debris matter. We quote these side by side on paper so you can compare frame material, glass package, and warranty duration without a sales pitch. Because we install these lines regularly in 94925, our crews have what they need for most Corte Madera jobs without waiting on a distributor.
Common Custom Windows & Doors Problems We See in Corte Madera Homes
- Salt-corrosion on aluminum frames and hardware: Homes within a half-mile of the tidal marshes get chronic bay breezes that pit aluminum and seize sill hardware. We routinely see windows in the eastern flats, the area east of Redwood Highway, fail within 10 to 15 years when inland units would last 20 to 25. The fix is usually a fiberglass or cellular PVC frame, not a like-for-like aluminum swap.
- Undersized rough openings from 1950s-60s construction: Original ranches in Corte Madera were framed for single-pane aluminum sliders with narrow jambs. Modern double-hung and casement units need wider framing. When we open the wall, we sometimes have to reframe the rough opening to code before the new unit goes in. That’s structural work, and it gets priced in writing before we start.
- Rotted sill plates hidden behind failed flashing tape: The base of an original slider is where water gets in, and by the time the aluminum frame shows damage, the wood underneath is already soft. We check the sill plate on every replacement we do in Corte Madera, because ignoring it means hanging a new window on a rotten foundation.
- Fogged double-pane glass on original ranch sliders: Seal failure is common in bay-side homes where daily temperature swings and salt air work on aging insulated units. The question is whether just the glass can be replaced or the frame has corroded beyond salvage. We’ll tell you straight, because putting new glass in a failing frame is money wasted.
Pricing for Custom Windows & Doors in Corte Madera, CA
Here’s what you can expect for custom window and door work in Corte Madera as of 2026. A standard replacement double-hung with low-E insulated glass runs $1,800 to $4,200 per window, installed. A custom shape window or oversized glass panel lands more in the $3,500 to $9,000 range. Full Corte Madera Door Installation for a sliding glass door with a fiberglass unit runs $4,800 to $12,000, and that number climbs if the rough opening needs reframing or the sill plate is gone. Commercial storefront glazing and curtain wall work are quoted per project after a site survey.
What moves the price in Corte Madera specifically? Proximity to the bay. Homes within a half-mile of the marshes should not get budget aluminum, and the upgrade to fiberglass or cellular PVC adds roughly 20 to 35 percent over entry-level aluminum. Undersized rough openings are common in the original ranches, so budget for possible reframing if your home was built before 1975. We write allowances into the contract for exactly this work, and any surprise gets priced and approved in writing before we touch it. Call (888) 635-0804 for a free estimate, and we’ll give you a written line-item quote.
We Also Serve Cities Near Corte Madera
Our crews work throughout central Marin, so if you’re in Corte Madera or just over the line in Larkspur, Mill Valley, Kentfield, or San Rafael, the same team covers your job. The permitting requirements differ slightly from town to town, but the salt air doesn’t respect city limits. Call (888) 635-0804 and we’ll tell you which office handles your address.
Serving Corte Madera, CA - Our Local Coverage Area
We’re based in the Corte Madera 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 - Custom Windows & Doors in Corte Madera
Corte Madera sits in California’s Title 24 Climate Zone 3, which sets specific U-factor and SHGC thresholds for replacement windows, and the building department requires documentation that your units meet those thresholds before they’ll sign off. A window schedule lists every opening, its dimensions, and the performance values of the unit going into it. A Title 24 performance report proves the numbers. We prepare both as part of our permit package on every Corte Madera replacement, so you’re not stuck holding an incomplete filing. Call (888) 635-0804 and we’ll handle the paperwork from start to inspection.
A stock size comes off a manufacturer’s standard cut list and generally costs less, but a 1960s slider in a Corte Madera ranch is often a half-inch or more off modern standard dimensions, and the rough opening may not be square. A custom unit is built to the actual measured opening, which means it seats properly in the framing and the flashing details work as designed. On bay-side homes where air and water infiltration are already a battle, custom sizing is usually the better call, and the price difference over stock is often under ten percent. We’ll quote both on paper and let you see the numbers.
It absolutely does, and it’s the single biggest material decision on bay-side jobs. Aluminum frames within a half-mile of the tidal marshes pit and seize in 10 to 15 years, less than half their expected life inland. That’s why we spec fiberglass or cellular PVC as the baseline for any replacement on the eastern side of Corte Madera, even though we wouldn’t default to that standard in Larkspur or San Rafael. The upgrade costs more up front, but it lasts two to three times as long in this environment.
We open the wall enough to expose the rough opening before ordering the replacement, because fixing the framing after the unit is built means paying for a second fabrication. If the sill plate is rotted or the opening is undersized, we reframe to current code, replace any damaged sheathing, and install a full sill-pan flashing system before the new window goes in. That work gets priced as a written change order before we proceed, never after. On a bayside 1958 ranch in the eastern flats, we found exactly this: seized aluminum sliders, undersized rough openings, and rotted sill plates hidden beneath failed flashing tape. We reframed, installed Marvin fiberglass double-hungs with low-E argon glass, and used stainless hardware throughout. The homeowner’s heating bill dropped noticeably the first winter.
Sometimes just the glass is enough. If the aluminum frame is still sound, not pitted or seized, and the rough opening is dry, a glass-only replacement runs $350 to $900 per sash and solves the fogging. If the frame shows salt corrosion, the thermal break is compromised, or the flashing has already failed, replacing only the glass buys you a couple of years at most. We’ll open the wall enough to inspect before we recommend either path, and we’ve told Corte Madera homeowners to save their money plenty of times. Call (888) 635-0804 for an exact quote, and we’ll give you the honest read.
Written by Dale Kessler, Owner at TruePane Windows & Doors, serving Corte Madera and Marin County.



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