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Fast, Reliable Door Installation Across Larkspur
Door installation in Larkspur runs anywhere from $1,800 for a standard entry door replacement to $9,500 or more for a custom canyon-side slider with fire-rated glazing. Most jobs fall between $2,400 and $5,600 installed, depending on the door type, rough-opening condition, and whether your parcel sits inside the Chapter 7A fire zone. If you’re off Magnolia Avenue or up in the Baltimore Canyon hills, call (903) 354-7134 and we’ll give you a written price before anything gets ordered.

We’ve been doing Door Installation work in Larkspur long enough to know that the house on Madrone Avenue needs a different approach than the one on Meadowood Drive. Old Town Victorians fight you with swollen fir jambs. Mid-century hillside builds hide corroded aluminum tracks. And canyon parcels bring fire-code requirements most contractors never mention until the permit gets kicked back. Owen Satterfield set Westlight up so we walk every Larkspur job with those realities on the table from the first visit.
Why Westlight Windows & Doors Is Larkspur’s Preferred Door Installation Company
We’re an independently owned and operated Kingswell location, which means every Larkspur job runs on the Kingswell Guarantee: a written price before any work starts, a committed arrival window, a clean job site, and a written guarantee on the completed work. If a repair fails within the guarantee period, we come back and fix it at no charge. That’s not a slogan. It’s on paper, handed to you at job completion.
Our technicians are background-checked and uniformed, so you know exactly who’s walking through your door before they ring the bell. Calls are answered by a live person 24 hours a day, seven days a week, not a voicemail box. When a Larkspur homeowner calls about a seized slider on a canyon-side street, they talk to a human who can schedule the visit or dispatch help. That matters here because fog corrosion damage doesn’t wait for business hours to get worse.
We carry eight manufacturer lines including PGT, CGI, and Therma-Tru, so an Old Town Craftsman doesn’t get forced into the same slab as a 1960s rancher. Owen Satterfield runs Westlight the way he’d want a contractor to run a job on his own street: straight numbers, real arrival windows, and a crew that leaves the site cleaner than it found it.
Sliding Glass Door Replacement in Larkspur
Sliding Glass Door Replacement is one of the most common jobs we do across Larkspur, and it’s rarely a simple pull-and-swap. On hillside streets above Baltimore Canyon, the original aluminum sliders from the 1950s and 60s have spent decades soaking in marine fog channeled up Corte Madera Creek. Tracks corrode, rollers seize, and the frame swells until the door binds at the jamb. A typical sliding glass door replacement in Larkspur runs $2,200-$4,800 installed, with fire-rated multi-pane glazing pushing the upper end on canyon parcels.
What the Job Actually Involves
We pull the old unit, document the rough opening, and repair what’s rotted or out of level before the new door goes in. If the parcel sits inside the Very High Fire Hazard Severity Zone, we spec the glazing to California Building Code Chapter 7A: multi-pane with at least one tempered lite, often a laminated interlayer. That’s the difference between a door that passes permit review and one that stalls it for weeks.
When Larkspur Homeowners Call Us
Fogged glass is the usual first signal. By the time you can’t see through the lite, the seal has failed and the frame has usually been taking on moisture for years. Other callers notice the door drags, or the lock no longer lines up because the jamb has moved. If you’re backing onto Baltimore Canyon Open Space Preserve, we also get calls from homeowners who just learned their replacement slider needs a fire-assembly rating and want it handled correctly the first time.
Storm Door Installation in Larkspur
Storm Door Installation in Larkspur is a different animal than it is in flatland Corte Madera. The same seasonal north winds that stress weatherstripping on aging assemblies also hammer exterior doors on the windward sides of hillside streets. A new storm door gives the primary entry a sacrificial layer against wind-driven rain and fog, and it buys older homes a buffer before the main door gets replaced. Most storm door installations in Larkspur run $600-$1,700 installed, depending on sizing, hardware, and whether the existing casing needs repair.
Protection Against Bay Wind and Fog
Storm doors on Larkspur homes aren’t decorative. They take the brunt of the marine layer that sits in the Corte Madera Creek valley for much of the year. A properly fitted storm door with compression weatherstripping cuts air infiltration at the entry and keeps the primary door from swelling and seizing in its jamb. On Victorians with original entry doors, that’s often the difference between a door that closes smoothly in January and one that won’t latch.

Fire-Zone Considerations
If the parcel falls inside the Very High Fire Hazard Severity Zone, the exterior door assembly behind the storm door still has to meet Chapter 7A for fire ratings. We coordinate that spec before ordering, so the storm door and the primary assembly work together instead of fighting each other at permit review. You get one written price covering both, fixed before anything goes on order.
Trusted Brands We Service in Larkspur
We install and service doors from PGT, CGI, CWS, and Therma-Tru, so Larkspur homeowners get a real product choice instead of whatever the contractor happens to have in the truck. PGT and CGI doors carry impact and fire-rated options that matter on canyon parcels. Therma-Tru entry doors handle the humidity swings in Old Town homes better than hollow-core slabs ever did. Because we order directly through those manufacturers, Larkspur customers aren’t waiting on a middleman for replacement hardware or warranty parts. If a latch fails six months after install, we come back under the 365-Day Done Right Promise and fix it at no charge.
Common Door Installation Problems We See in Larkspur Homes
- Swollen and rotted fir door jambs in Old Town Victorians and Craftsman-era homes. Canyon humidity keeps the wood saturated year-round, so a new slab won’t square up until the rough opening is corrected. We repair or rebuild the jamb before the new door goes in, or the install fails within a season.
- Corroded, out-of-level aluminum slider tracks on hillside mid-century builds. Dropping a new door onto a baked track causes binding at the jamb that reads as a bad unit. We level and replace the track as part of the scope, and the price reflects it up front.
- Weatherstripping and air-infiltration failures from seasonal bay winds. Wind-driven fog sneaks past worn seals and soaks the door edges, which accelerates rot and makes the home harder to heat. Larkspur homes on windward streets need heavier compression seals than inland Marin homes.
- Missing fire-assembly ratings on canyon parcels inside the Very High Fire Hazard Severity Zone. Most initial quotes don’t include Chapter 7A compliance because the contractor never checked the Cal Fire designation. We pull the FHSZ parcel data before ordering, so the permit doesn’t stall at review.
Pricing for Door Installation in Larkspur, CA
A standard entry door replacement in Larkspur runs $1,800-$4,200 installed. Sliding glass door replacement runs $2,200-$4,800, and fire-rated canyon-side sliders with tempered multi-pane glazing run $4,500-$9,500. Storm doors run $600-$1,700. The spread comes down to rough-opening condition, door type, and whether the parcel sits inside the Chapter 7A boundary. The Kingswell Guarantee means the written price you get before ordering is the price you pay. We don’t revise quotes at the door, and long-lead door orders get locked in writing at signature so a manufacturer price bump never lands on you. Call (903) 354-7134 for a free estimate and a written line-item quote.
We Also Serve Cities Near Larkspur
If you’re outside Larkspur, we also handle Door Installation in Larkspur and regular door work in Kentfield, Corte Madera, San Rafael, and Mill Valley. The same crew, the same written pricing, the same guarantee. If you’re near the Larkspur border and wondering if we cover your street, call and ask.
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 About Door Installation in Larkspur
Because parcels backing onto Baltimore Canyon Open Space Preserve sit inside the Very High Fire Hazard Severity Zone, the Marin County Building Department enforces California Building Code Chapter 7A on exterior door replacements. Exterior doors must carry a fire-assembly rating, and glazing must be multi-pane with at least one tempered lite. This requirement often surfaces only at permit review, which is why we pull the Cal Fire FHSZ designation before ordering. Call (903) 354-7134 and we’ll check your parcel during the free estimate.
Yes. We document the glazing spec, the door fire-assembly rating, and the parcel’s FHSZ designation as part of the job file, and we include that paperwork with the permit package. You won’t be chasing down compliance letters from the manufacturer or the building department. The written price covers the documentation and the compliant door assembly, so there’s no surprise line item at permit review.
The year-round marine fog channeled up Corte Madera Creek keeps relative humidity elevated in Old Town and the canyon neighborhoods, and original fir and redwood jambs from the 1890s-1920s stay swollen and damp for months at a time. Once the paint film cracks, water wicks into the end grain and the rot accelerates. That’s why we inspect and repair the rough opening before installing any new slab. A new door on a rotted jamb fails within a season.
Most custom and fire-rated doors carry a manufacturer lead time of weeks, and a unit ordered today can’t be re-priced at the customer’s expense if materials shift. The Kingswell Guarantee puts the price in writing at signature, before the order goes to the manufacturer. You sign once, we order once, and the price doesn’t move. If something on our end changes, we eat it, not you.
We schedule free estimates across Larkspur within the week in most cases, and emergency board-up or security work gets a live person on the phone 24/7. Storm and entry door installs typically close out in a single day once the unit lands. Canyon-side fire-rated sliders run on manufacturer lead time, which we’ll give you in writing when we quote. Call (903) 354-7134 to schedule your free estimate.
Written by Owen Satterfield, Owner at Westlight Windows & Doors, serving Larkspur since 2009.










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