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 Larkspur
Custom windows and doors in Larkspur run $1,800 to $6,500 per opening installed, depending on frame material, glazing requirements, and whether the home sits in a Wildland-Urban Interface fire zone. Most orders take 6 to 14 weeks from signed approval to install day. We’ve been doing this work in Larkspur for years, and we know that a Craftsman on Magnolia Avenue has different needs than a hillside home above downtown. Call (888) 635-0804 for a written quote.
What sets Custom Windows & Doors work in Larkspur apart is that the canyon and the hillsides demand different solutions. Baltimore Canyon stays damp under redwood shade. The upper slopes fall under state fire code. We plan for both before we order anything. That’s why we measure every opening twice, spec materials for the specific microclimate, and register warranties in writing before the truck leaves.
Why TruePane Windows & Doors Is Larkspur’s Preferred Custom Windows & Doors Company
Dale Kessler started TruePane in 2008 out of a principle that out-of-true installs and voided warranties were problems worth fixing permanently. Years of combined craft experience through the Kessler family trade runs through every job we do in Larkspur. Our technicians are background-checked, uniformed, and trained to work in someone’s home the way they’d work in their own mother’s. We answer the phone live, 24 hours a day.
Larkspur customers call us because we write down exactly what we’re installing: both manufacturer warranty layers registered in writing, durations stated, before we leave the driveway. The Done Right Promise means if something isn’t right, we come back and fix it. No paperwork fights, no arguing. That’s The Keystone Standard, and it applies to every single opening we touch in the 94939 zip code.
Our Custom Windows & Doors Services in Larkspur
Architectural Grilles & SDLs
Simulated divided lites and true divided lites matter in Larkspur. A pre-WWII Craftsman or Victorian along Magnolia Avenue has trim profiles and muntin patterns that off-the-shelf windows simply don’t match. We spec custom grilles, interior and exterior, sized to the original sightlines. This preserves the historic streetscape character that makes those blocks what they are. If the grille profile is wrong, the whole elevation reads wrong.

Oversized Glass Panels
Hillside homes above downtown Larkspur often have view-facing walls where homeowners want the largest glass the structure can carry. But in WUI-designated zones, that glass has to be impact-rated or fire-rated, which changes thickness, weight, and frame engineering. We coordinate with structural engineers and glass fabricators to spec panels that meet code without sacrificing the view. Shipping alone for a single oversized IGU can run $300 to $700.

Commercial Storefront Glazing
Storefronts along Magnolia Avenue and around the downtown Larkspur corridor deal with morning fog, afternoon sun, and foot traffic. We replace and upgrade aluminum storefront systems, entry doors, and sidelites for local businesses. Most commercial glass replacements in Larkspur run $1,200 to $4,800 depending on lite size and whether the frame needs full replacement or can be re-glazed in place. We schedule around business hours when we can.

Curtain Wall Systems
For Larkspur commercial buildings and a handful of larger modern residences, curtain wall work means engineering, fabrication, and precise sequencing. We handle the glazing side: panel replacement, seal restoration, and complete reglaze projects. Curtain wall glass in Larkspur typically runs $40 to $90 per square foot installed for standard IGU replacement, more for fire-rated or oversized lites. Lead times on custom fabricated panels run 8 to 14 weeks, so we plan accordingly.

What happens when you call
- 1
A real person answersNo phone trees - you reach a local pro.
- 2
You get an upfront price rangeHonest numbers before anyone is dispatched.
- 3
A background-checked tech heads outLicensed & insured, dispatched right away.
- 4
You approve before work beginsNothing starts until you say go.
Trusted Brands We Service in Larkspur
We’re authorized installers for more than a dozen manufacturer lines, and for Larkspur homes we regularly work with, PGT, and CGI. Marvin handles the historic-profile work on Magnolia Avenue. PGT and CGI carry the impact-rated and fire-rated lines required on WUI hillsides. We quote manufacturer lines side by side on paper so you see exactly what each option costs and what each warranty covers. No vague promises. We also maintain access to local parts distribution for faster turnarounds on service work in the 94939 area.
Common Custom Windows & Doors Problems We See in Larkspur Homes
- Seal failure from marine fog cycles. Fog funnels up the Corte Madera Creek valley and keeps north-facing hillside homes damp. Older double-pane units in Larkspur fail when repeated condensation cycles break the seal, leaving argon-filled panes fogged and drafty. Replacement IGU cost here runs $450 to $1,100 per sash depending on size and low-E coating.
- Rotted frames in Baltimore Canyon. Redwood canopy blocks sun so completely that wood window frames stay wet for days after a storm. We regularly pull a sash expecting a simple swap and find the rough sill plate and king studs soft. That turns a half-day job into a multi-day reframe before any glass goes in.
- Fire-code rejections after ordering. Homeowners on WUI-designated hillsides sometimes order standard wood windows before checking current code. The opening gets rejected at inspection, and they’re stuck paying for a redesign. We verify fire-zone requirements before we quote anything.
- Wood jamb cupping on shaded hillside homes. Persistent moisture causes wood sills to cup and split, and weatherstripping to compress and fail early. Casement and double-hung units bind or leak air within a few seasons. We often spec composite or fiberglass frames for these specific Larkspur exposures.
Pricing for Custom Windows & Doors in Larkspur, CA
Here are honest Larkspur ranges. A standard custom double-hung replacement in a flatland Craftsman runs $1,800 to $3,400 installed. The same opening in a WUI hillside zone jumps to $2,800 to $5,200 with fire-rated glazing and non-combustible frames. A full-home replacement on a 3-bedroom Larkspur home typically runs $28,000 to $65,000. Oversized view-facing panels start around $3,500 per opening and go up from there. Lead times drive the calendar, not labor: custom fabrication runs 6 to 14 weeks. We fix the price in writing before ordering anything, and we don’t change it once work starts. Call (888) 635-0804 for a free written estimate.
We Also Serve Cities Near Larkspur
We work throughout Marin County. That includes Larkspur neighbors like Kentfield, Corte Madera, San Rafael, and Mill Valley. The same crews, the same warranty registration, the same Done Right Promise. If you’re in one of those towns and need custom windows or doors, call us and we’ll schedule a measurement.
Serving Larkspur, CA - Our Local Coverage Area
We’re based in the Larkspur 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 Larkspur
Yes, they really do. California’s Wildland-Urban Interface building code Chapter 7A applies to replacement windows and doors in designated hillside zones above downtown Larkspur, not just new builds. When you replace windows or exterior doors in those zones, the new units must meet fire-rated glazing and non-combustible frame requirements. We verify zone maps and current code before we quote, so you don’t order the wrong thing. Call (888) 635-0804 and we’ll check your specific address.
Custom windows and doors in Larkspur typically take 6 to 14 weeks from approved order to install day. The range depends on manufacturer, glass type, and whether it’s a standard custom size or something more involved like oversized panels or fire-rated units. We give you a written lead time when we quote, and we’ll update you if the factory slips. The install itself usually takes one to three days for most Larkspur homes.
Yes. We’ve matched trim profiles on Craftsman bungalows and Victorian cottages along Magnolia Avenue and the surrounding blocks. We take a profile sample from your existing millwork, have the knife ground to match, and run new trim that matches the original sightlines. That includes sill noses, brick mould, and interior casing. It costs more than off-the-shelf trim, but if the house has original character, the match matters.
Because the redwood canopy in Baltimore Canyon blocks direct sun and keeps exterior wood frames wet for extended periods. When the frame stays damp, the edge seal of the IGU gets exposed to more moisture and wider temperature swings, which stresses the seal and shortens its life. We see seal failure in the canyon years earlier than in flatter, sunnier parts of Larkspur. Replacement IGU cost runs $450 to $1,100 per sash depending on size and coating.
Worth considering. On shaded north-facing Larkspur hillsides and in Baltimore Canyon, wood frames rot faster than almost anywhere else in Marin. We often recommend composite or fiberglass frames for those exposures because they don’t absorb water the way wood does. They can be painted or finished to match the original look. You sacrifice a little of the authentic wood feel, but you stop replacing sashes every decade. We’ll show you both options side by side with prices before you decide.
Get Your Larkspur Custom Windows & Doors Estimate
If you’re replacing windows or doors in Larkspur, call (888) 635-0804. A live person answers. We’ll schedule a measurement, walk you through the options for your specific street and your home’s exposure, and put a written quote in front of you. No pressure, no vague numbers, no change orders after the fact. Dale Kessler’s rule still stands: if the pane is not true, the job is not done.
Written by Dale Kessler, Owner at TruePane Windows & Doors, serving Larkspur and Marin County.



Before
After
Before
After
Before
After