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 Fairfax
Custom window and door work in Fairfax follows a different set of rules than most of Marin County. The canyon holds moisture against wood frames year-round, and the CAL FIRE Very High Fire Hazard Severity Zone map covers a large portion of town. That combination means a standard off-the-shelf replacement unit that works fine in San Rafael will often fail a Fairfax permit review before the first screw is driven. We know this because we pull those permits, read those correction letters, and fix the specification before it becomes a mid-project surprise. If you’re pricing Custom Windows & Doors for a hillside cottage or a flatland bungalow here, call (888) 635-0804 for a line-item estimate that accounts for Fairfax’s code layer and moisture load from the start.
Why TruePane Windows & Doors Is Fairfax’s Preferred Custom Windows & Doors Company
We have spent years opening up window and door openings in Fairfax homes, and the findings follow a pattern. The rough openings under original 1920s and 1930s sashes are usually racked from decades of canyon damp. The sill plating is soft in at least one corner. And the flashing tape that should have been there from the beginning usually never was. None of this shows up in a sales brochure, and most homeowners don’t expect it until a contractor has the wall open. Our crews expect it. That is the difference between a company that installs windows and a company that understands how Fairfax homes actually behave.
Dale Kessler founded TruePane Windows & Doors on a rule that still governs every job: if the pane is not true, the job is not done. That rule is not a slogan. It is the reason we sister studs, flash openings with butyl tape, and order fire-rated glazing assemblies when the parcel demands it, even when the homeowner never asked and the original quote did not show that line. Reviews from Fairfax customers routinely mention that we measure every opening twice and register both manufacturer warranty layers in writing before the truck leaves the driveway. A live person answers our phone 24 hours a day, so when a question comes up between estimate and install, you reach a person, not a call tree.
Our Custom Windows & Doors Services in Fairfax
We handle the full scope of custom window and door work across Fairfax, from single-sash replacements on a flatland bungalow to multi-unit storefront glazing on Sir Francis Drake Boulevard. The services that matter most in this town’s housing stock are custom shapes, oversized glass, and architectural grilles, because those are the jobs a standard window shop will not touch.
Custom Shape Windows
Fairfax cottages built in the 1920s through 1950s often have round-top sashes, eyebrow windows, and angled bays that don’t match anything in a modern catalog. We template every opening by hand and order custom shape windows to the exact radius and angle. That matters because a sawed-in replacement that ignores the original curve destroys the character of the house, and a homeowner who has lived there for thirty years will notice the difference every single day. In Fairfax, those shapes also need to meet WUI glazing rules when the parcel sits in the Very High Hazard zone, so we specify fire-resistant tempered or laminated glass from the first drawing.

Commercial Storefront Glazing
Fairfax’s small commercial district on Sir Francis Drake and Broadway runs on older storefronts with aluminum frames and tired seals. We replace commercial storefront glazing in those storefronts without shutting the business down for days. Work is scheduled around customer traffic, and we keep the openings weather-tight at the end of every shift. For Fairfax commercial properties, that matters because the town’s damp microclimate will find any gap left overnight and drive water straight into the wall cavity.

Curtain Wall Systems
Curtain wall work on Fairfax hillside homes and small commercial buildings calls for different framing than flatland construction. The wind loads on a canyon-facing elevation are not the same as on a street-level storefront in Larkspur. We engineer curtain wall systems to the actual exposure, then install them with pressure-cap glazing so the aluminum and glass assembly stays dry. On any Fairfax parcel inside the fire hazard severity zone, the glazing components are fire-tempered and sized before the order goes in, not after the inspector flags it.

Architectural Grilles & SDLs
Owners of 1920s and 1930s Fairfax bungalows often want the divided-light look of the original windows without giving up a modern insulated unit. Architectural grilles and simulated divided lites (SDLs) deliver both. We build the grille pattern to match the original muntin profile, then bond it to the glass so the window reads true from the curb. The glass itself is low-E and argon-filled where the opening allows, and fire-rated where the Fairfax permit requires it. That combination keeps the historic character and passes the energy and fire code.

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 Fairfax
We are an authorized installer for more than a dozen manufacturer lines, and for Fairfax work we talk through the options honestly on paper. PGT and CGI make impact-rated and fire-resistant products that fit the WUI demands of canyon parcels. Ply Gem and CWS offer solid mid-range lines where the code layer is lighter. We quote two or three manufacturer options side by side so you can see the difference in glass spec, frame material, and warranty term before you spend a dollar. That side-by-side quote is the only honest way to compare windows, and it is how we have always done business in Fairfax.
Common Custom Windows & Doors Problems We See in Fairfax Homes
- Bottom-sash and sill rot from redwood canopy drip. The persistent damp on Fairfax’s wooded slopes keeps the lower sections of original wood-sash windows wet for months at a time. By the time a homeowner notices the sash won’t seal, the sill underneath is usually soft and the rough opening needs rebuilding before the new unit goes in.
- Fogged glass that points to a missing flange flash. A failed seal between panes is the visible symptom. On Fairfax’s dampest slopes, the real issue is often water migrating behind the window flange because the original install had no flashing tape. We rebuild the wall cavity dry before we set the new unit.
- Hillside access that turns a simple replacement into a logistics problem. Many Fairfax homes sit on steep lots off narrow switchback roads. A standard glass panel truck cannot reach the house. We walk oversized sashes up in sections with padded carriers and a two-person team, and we plan for that delivery before the quote is written.
- Permit corrections for WUI glazing mid-project. Contractors pulling permits through the Town of Fairfax are regularly surprised to find that standard vinyl replacement windows pass Title 24 energy code but fail WUI fire-resistance requirements. We check the parcel’s hazard zone mapping before we order, so the first submitted spec is the one that passes.
Pricing for Custom Windows & Doors in Fairfax, CA
Custom window and door work in Fairfax runs higher than the Marin flatlands because of the code layer and the access. A standard custom shape window replacement on a 1930s cottage runs $1,200 to $2,800 per opening depending on glass spec and frame material. Oversized glass panels for a hillside sliding door run $3,500 to $9,000 installed, and the number moves up when the parcel sits in the Very High Hazard zone and requires fire-rated glazing. Architectural grilles and SDLs add $250 to $600 per sash. Curtain wall systems are quoted per linear foot, typically $500 to $950 in Fairfax, driven by aluminum grade and wind-load engineering. The estimate you get from us is the number we stand behind, in writing, with no change orders unless we find something behind the wall that we document and you approve first. Call (888) 635-0804 for a free line-item estimate on your Fairfax home.
We Also Serve Cities Near Fairfax
Our crews work up and down the Ross Valley and across central Marin. In addition to Fairfax, we serve San Anselmo, Kentfield, San Rafael, and Larkspur. Each town has its own building department quirks and fire-zone mapping, and we pull permits and order glazing according to the rules where the house actually stands.
Serving Fairfax, CA - Our Local Coverage Area
We’re based in the Fairfax 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 Fairfax
Yes, in most cases. If your Fairfax parcel sits inside the CAL FIRE Very High Fire Hazard Severity Zone, any window or door you replace under permit must meet the WUI fire-resistant glazing and door assembly standards in the current code. That means the replacement glass has to be tempered or laminated to the required fire rating, and the door frame and hardware need to meet the same standard. A standard vinyl replacement unit that passes energy code will often fail this review. Our crew checks the parcel’s hazard zone mapping before we order anything, so the specification we submit is the one that passes on the first plan check. Call (888) 635-0804 and we will check your parcel address against the current map before you commit to anything.
Fairfax sits at the bottom of a redwood-shaded Ross Valley canyon, and the marine fog that rolls up Cascade Canyon gets trapped against the wooded slopes. Redwood canopy drip keeps the lower window frames and sills wet for a much longer portion of the year than homes on the more exposed flats of San Anselmo or Kentfield. That consistent moisture load is why original single-pane 1920s through 1950s sashes in Fairfax show bottom-sash and sill rot so early. San Anselmo, one canyon over, simply dries out faster. The fix is a properly flashed and sealed replacement, but only after the rotted rough opening has been rebuilt.
Yes. We build architectural grilles and simulated divided lites to match the original muntin profile of your Fairfax cottage, then bond them to a fire-rated low-E insulated glass unit. That gives you the historic divided-light appearance from the street and a glazing assembly that meets WUI requirements if your parcel sits inside the Very High Hazard zone. The grille profile is copied from your existing window, so the replacement reads true to the period of the house. We have done this on bungalows throughout the 94930 zip code.
We reframe the opening, and we tell you about it before you pay for anything you didn’t approve. On a steep hillside cottage off Bolinas Road, we opened up a 1930s wood-sash bay and found the original rough opening so racked that the new casement unit could not be squared without structural work. Our crew sistered the jamb, flashed the entire opening with butyl tape, and installed a fire-rated low-E insulated glass unit because the parcel sits in the Very High Hazard zone. The homeowner didn’t know that permit requirement existed until we pulled the permit. That kind of discovery gets documented, priced, and approved in writing before we touch it. No surprise line items on the final bill.
Yes, and we do it regularly. The limiter is the road, not the door. Many Fairfax hillside roads are too narrow for a standard glass panel truck, so oversized replacement sashes and door panels get walked up in sections with padded carriers and a two-person crew. We plan that delivery route before the quote is written, because the switchback access on a narrow road is part of the job cost. The installation itself is standard once the panels are on site. Call (888) 635-0804 for a free estimate that includes the access plan for your specific lot.
Written by Dale Kessler, Owner at TruePane Windows & Doors, serving Fairfax with custom window and door work that passes the town’s dual moisture and fire-code reality before the first pane is ordered.



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