Free in-home measure and quote - PGT, CGI and CWS impact lines compared on your actual openings, style by style
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AfterFast, Reliable Door Installation Across Fairfax
Door installation in Fairfax, CA comes with a set of conditions most Marin towns never deal with, and we’ve been working inside those conditions long enough to know exactly what a given house will throw at us. The short version: a new front door or French door in Fairfax typically runs $1,800 to $6,500 installed, depending on material, glazing, and what the permit triggers. When the job requires fire-rated or tempered glass because the home sits in the High Fire Hazard Severity Zone, expect the material cost to climb by 40 to 60 percent over a standard unit. Call (903) 354-7134 and we’ll give you a written price before any work starts, not a vague range that moves once the wall is open.
We’re the local, independently owned Kingswell location for Door Installation, and we know Fairfax’s housing stock block by block: the craftsman bungalows off Sir Francis Drake Boulevard, the hillside lots backing up to Cascade Canyon, the tight streets around Bolinas Road where parking a work truck is its own puzzle. Our crews have pulled rotted jambs, reset undersized rough openings, and rewired outdated switch boxes found inside walls across this town. A door swap in Fairfax is rarely just a door swap. We plan for that from the first inspection, not after the wall is open.
Why Westlight Windows & Doors Is Fairfax’s Preferred Door Installation Company
Fairfax homeowners call us because we answer the phone, show up in the window we gave, and write down every price before a screw turns. That’s the Kingswell Guarantee, and it applies to every job we do in Fairfax, from a simple exterior door on a ranch off Center Boulevard to a full French door set on a hillside lot near White Hill. A live person answers our line 24 hours a day, seven days a week. When you call, you reach a human who can schedule, answer a question, or send someone out, not a voicemail that hopes you’ll leave a message.
Owen Satterfield founded this company in 2009 on a straightforward idea: put every promise in writing, then keep it. That’s why every Fairfax job gets a written price before work begins, a committed arrival window, a clean job site at the end, and a written guarantee handed to you when the work is done. If the installation fails within the guarantee period, we return and fix it at no charge. No negotiating. The 365-Day Done Right Promise is automatic, and so is the free second visit if a repair doesn’t hold. Our technicians are background-checked and uniformed, so the person at your door is someone you can identify and trust.
We’ve earned a strong reputation across Fairfax for exactly the work this town’s houses need most: replacing warped, rotted doors on 1930s and 1940s bungalows, correcting rough openings that were never square, and navigating the WUI fire-glazing requirements that flatland Marin contractors rarely see. That local knowledge is worth more than any discount, because it’s what keeps the final bill from becoming a surprise.
French Door Installation in Fairfax
French Door Installation in Fairfax is a common request for homeowners on the valley floor who want to open up a dining room or living space to a back deck or garden, and on hillside lots where a south-facing glass door pulls afternoon light into a dark kitchen. In Fairfax, a French door set typically runs $2,500 to $6,500 installed, including the frame work, weather sealing, and hardware the wet climate demands. When the property’s HFHSZ designation requires impact-rated or tempered glazing, the glass package adds $400 to $1,200 per door panel, and that’s a cost we identify during the estimate, not after the door arrives.
What makes French doors in Fairfax different is moisture. The persistent valley fog that sits over this town keeps threshold areas damp for months at a stretch, so the sill pan and bottom weather seal have to be built right or you’ll be replacing rot inside five years. We use Therma-Tru and PGT door systems rated for exactly these conditions, and we flash the rough opening so wind-driven rain from the northwest never finds its way behind the jamb. Getting that detail wrong is how a $3,000 French door becomes a $9,000 wall repair, and we’ve been called in to fix both.
Replacement French Doors for Older Openings
Most Fairfax homes built before 1960 have rough openings that are not square and not sized for modern French door units. We measure every opening in three places before ordering, because a half-inch discrepancy means a custom or modified unit rather than a stock one. That measurement happens during the estimate, and the price we write reflects the actual opening, not what the salesman thinks it might be.
Fire-Rated and Impact-Glazed Options
On upslope streets bordering Cascade Canyon open space, French doors almost always trigger a WUI compliance review. That usually means laminated, tempered, or fire-rated glass panels, and we’ll bring the spec to your permit application rather than letting the Fairfax building department surprise you with it mid-job. The Kingswell Guarantee covers the price before work starts, which means the glazing cost is in writing from day one.
Front Door Replacement in Fairfax
Front Door Replacement in Fairfax is the single most common job we do in this town, and the reason is simple: decades of wet seasons have warped and rotted the original solid-wood doors on the redwood-clad bungalows and cottages that line streets like Scenic Road and Marinda Drive. A new front door in Fairfax runs $1,800 to $4,800 installed for a standard unit, and $3,500 to $7,000 when the opening needs reframing or the WUI designation forces a fire-rated glass package. We’ll tell you which price applies before you sign anything.
What a homeowner books as a simple door swap often turns into something larger once the old unit comes out. The jamb is soft at the bottom. The rough opening was never sized for a modern pre-hung door. The wall framing is undersized for the new header code requires. This is the single biggest reason a Fairfax door quote moves, and it’s also why we write allowance lines into every contract for older homes. If we open the wall and find something that needs fixing, we show you, we price it in writing, and we don’t touch it until you approve the change order. No revised invoices at the door. No surprise line items.
Replacing a Rotted Jamb and Frame
On a 1940s craftsman bungalow near Cascade Canyon, our crew pulled a rotted solid-wood front door and found the original redwood jamb soft at the bottom rail and the rough opening undersized for any stock unit. We performed a framing and wiring inspection through the open wall, then wrote an allowance into the contract for the reframing and priced it before we cut anything. The owner signed off on the change order, we reset the opening, and the new Therma-Tru door with impact-rated glazing went in clean. That’s how every Fairfax project should run.
Weather Seals That Actually Hold
Fairfax catches wind-driven rain on west- and north-facing elevations harder than most of Marin, and a failing weather seal is usually the first sign a door is done. We replace the entire door system, not just the slab, so the threshold, sweep, and side seals work together. A door that seals properly in November here will save you thousands in framing repair by March.
Trusted Brands We Service in Fairfax
We install and service doors from eight manufacturer lines, and for Fairfax homeowners that means a genuine product choice rather than a single brand the contractor happens to carry. Our inventory includes PGT and CGI impact-rated systems built for the WUI requirements this town’s fire hazard zone demands, Therma-Tru entry doors that hold up to wet seasons, and CWS models for homeowners who want a specific look without waiting on a custom shop. Because we keep common Fairfax sizes and parts in stock locally, turnaround from estimate to installation is faster than a special-order shop, and warranty service doesn’t stall while a part ships from out of state.
Common Door Installation Problems We See in Fairfax Homes
- WUI compliance surprises at permit. The High Fire Hazard Severity Zone designation means a door that was booked as a simple swap can require fire-rated or tempered glazing, and that can double the material cost. We identify the requirement during the estimate so it’s in the written price, not sprung on you mid-permit.
- Rotted thresholds and bottom rails. Chronic valley fog keeps doors damp for months at a stretch, and the moisture works its way up from the threshold into the jamb and framing. By the time the door sticks or the sweep fails, the rot has usually spread into wood you can’t see until the unit comes out.
- Non-standard rough openings. Century-old Fairfax cottages and bungalows were framed before standardized door sizes existed, so off-the-shelf units rarely fit without modification. That’s why our estimates include a physical measurement of every opening before a price is written.
- Outdated wiring and undersized framing inside the wall. Opening up an older Fairfax wall routinely turns up knob-and-tube wiring, a header that never met code, or failed waterproofing behind the trim. We inspect first, price the fix in writing, and get your approval before proceeding.
Pricing for Door Installation in Fairfax, CA
Here are the ranges we quote for most Fairfax jobs, in writing, before any work begins. A standard exterior door replacement runs $1,800 to $3,200. A front door with fire-rated glazing required by the FHHSZ runs $3,500 to $5,500. French door installation runs $2,500 to $6,500, depending on size, glass package, and frame condition. Reframing a rotted or undersized opening adds $800 to $2,000 and is always priced as a written allowance before we cut. If your home requires impact-rated glazing for WUI compliance, expect the glass package to add $400 to $1,200 per panel. Every quote is a fixed written price, not an estimate that moves. Call (903) 354-7134 to schedule your free estimate.
We Also Serve Cities Near Fairfax
Our crews work throughout the Ross Valley and beyond. In addition to Fairfax, we serve San Anselmo, Kentfield, San Rafael, and Larkspur, and we coordinate scheduling and dispatch from our San Francisco Bay Area office. If you’re in one of these nearby towns and need door installation, call (903) 354-7134 and we’ll schedule an estimate.
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 About Door Installation in Fairfax
Fairfax’s housing stock is dominated by homes built between the 1920s and 1960s, and the framing, headers, and wiring inside those walls were never built to modern code. Once the old door comes out, we often find a rotted jamb, an undersized header, or outdated wiring that needs addressing before the new unit can go in. We handle this by inspecting first, then writing an allowance line into the contract so any necessary reframing or electrical work is priced and approved in writing before we proceed. Call (903) 354-7134 to get a written quote that accounts for this from the start.
Yes, it can, and this is the number one thing that catches Fairfax homeowners off guard. A permit for a door replacement in the HFHSZ may require fire-rated or tempered glazing, particularly on upslope properties bordering Cascade Canyon open space. That glazing can add 40 to 60 percent to the material cost of the door, and we identify the requirement during the estimate so the written price you receive accounts for it before you sign. Call (903) 354-7134 and we’ll walk you through what your specific property requires.
We install doors from eight manufacturer lines, including PGT and CGI for impact-rated and fire-resistant applications, Therma-Tru for entry doors, and CWS for fiberglass and steel exterior options. The right product gets matched to the job rather than forcing the job to fit one brand. If your Fairfax property requires WUI-compliant glazing or a custom size to fit an older rough opening, we’ll spec the appropriate system and price it in writing. Call (903) 354-7134 to discuss options.
We inspect through the open wall first, identify what needs attention, and then write an allowance line into the contract that prices the fix before we touch it. You see the number, you approve the change order in writing, and only then does the work proceed. This is how we keep a Fairfax door replacement from becoming a financial surprise, and it’s the same written-price approach we apply to every job in this town. Call (903) 354-7134 to get your estimate started.
Fairfax sits at the inland head of the Ross Valley where it catches some of Marin’s heaviest annual rainfall, routinely 35 to 45 inches per year, and the surrounding ridgelines funnel persistent marine fog into the valley floor even when coastal towns are clear. That chronic dampness keeps thresholds and bottom rails wet for months, accelerating sill and jamb decay far faster than in San Anselmo or Ross. Proper flashing, sill pans, and weather seals are the only real defense, and that’s why we build the entire door system to wet-climate standards. Call (903) 354-7134 for a free estimate on a door that will hold up to Fairfax weather.
Fairfax’s dual WUI fire-glazing and moisture-performance requirements mean a door replacement here isn’t a job for a contractor who only knows flatland Marin. We’re the team that handles both, with written pricing before any work starts and a guarantee in your hand when it’s done. Call (903) 354-7134 to schedule your free estimate.
Written by Owen Satterfield, Owner at Westlight Windows & Doors, serving Fairfax since 2009.