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 Replacement Across Fairfax
Door replacement in Fairfax typically costs $1,400 to $4,800 for an exterior door and $650 to $1,900 for an interior door, depending on material, size, and whether the rough opening needs repair. Fairfax homes sit in a Very High Fire Hazard Severity Zone, which means exterior doors on street-facing or deck-adjacent openings usually need ignition-resistant materials and ember-resistant weatherstripping to pass plan review. That changes the spec conversation before you ever pick a style. We know exactly what the Fairfax building department asks for, because we deal with it weekly. If you’re pricing a replacement, call (682) 281-2168 and we’ll give you a written quote that includes any fire-hardening requirements up front.
Why Juniper Windows & Doors Is Fairfax’s Preferred Door Replacement Company
Sean Mackey has built Juniper Windows & Doors around a simple standard: every Fairfax job gets a written price before a single screw turns. No vague estimate that morphs into a surprise invoice at the end. We stock door systems from PGT, CGI, Therma-Tru, and ViewLux, and our technicians are background-checked and uniformed. When you book, you get a live arrival time you can track, not a four-hour window. When the work is done, you get before-and-after photos and a digital invoice you can pay from a link. That’s the Relay Standard, and it applies to every job in Fairfax.
Fairfax homeowners keep our schedule busy because word travels fast here. A door that leaks air on a redwood-shaded hillside is a door that drips condensation by November. We replace more than doors; we replace the problems that come with them, like dry rot at the sill plate and frames that have shifted out of square over decades of wet winters. Being local matters because the town’s terrain, climate, and code requirements aren’t the same as San Anselmo or Larkspur. We scope Fairfax jobs for Fairfax conditions.
Interior Door Installation in Fairfax
Interior Door Installation in Fairfax usually means swapping hollow-core slabs for solid-core prehung units, or replacing a tired bedroom or bathroom door with something that actually closes quietly. Fairfax homes skew older, with wood-frame construction and door openings that have drifted out of square over time. A new prehung door gives us a clean frame to work with, so the door doesn’t rub the jamb on humid summer days. Most interior Door Replacement work runs $650 to $1,900 per opening depending on door style, hardware, and trim.
What we check before the new door goes in
Most homes here have settled, and a door opening that’s 80 inches on one side can be 79 and 7/8 on the other. We measure, then tell you the truth about whether a stock door fits or a custom size makes more sense. We also look for signs the wall has shifted near the Fairfax hillside foundations common around Deer Park and Cascade Canyon.
When an interior door replacement turns into more
Sometimes a quick door swap reveals a sagging header or dry rot where a roof leak once ran. If we find framing that isn’t sound, we stop and show you exactly what we found before doing anything else. You won’t be surprised by a repair fee you never approved. Our techs document everything with photos, and the written quote gets updated before we proceed.
Door Installers in Fairfax
Door Installers in Fairfax are the crew members who do the physical work: removing the old slab and frame, inspecting the rough opening, setting the new unit, and flashing it so water stays outside. A real installation isn’t a two-hour swap; it’s a three to five hour process on an exterior door when done correctly. Fairfax exterior door installation runs $1,400 to $4,800 on average, with fiberglass and impact-rated glass at the higher end.
Why the rough opening matters in Fairfax
Homes here are old enough that the rough opening is rarely perfectly square, and the sill plate under an exterior door is often the first thing to rot under redwood canopy. We pull the old door and inspect before we set the new one, because reusing a bad opening means you’re paying for a door that will sag within two years. If the sill plate needs replacement or repair, that adds to the job and we show you the line-item price change before swinging a hammer.
What happens after the door is set
We re-flash the threshold, shim and square the frame, adjust the strike plate, and walk you through the final result. Every exterior door in a Fairfax Fire Hazard Severity Zone gets checked against the ignition-resistant spec before we call the job done. You get photos on the digital invoice, and the 365-Day Done Right Promise means if something isn’t right, we fix it for a full year, parts and labor, in writing.
Trusted Brands We Service in Fairfax
Juniper carries door systems from PGT, CGI, and Therma-Tru, which means a Fairfax homeowner can spec impact-rated glass or a fiberglass slab without waiting on a distributor that doesn’t know the local code. PGT and CGI doors hold up to wind and wildfire ember exposure, and Therma-Tru offers the fiberglass frames we recommend for Fairfax’s damp, shaded lots. Because we stock common sizes and hardware locally, we can usually move a Fairfax project to the calendar faster than a contractor ordering from a catalog. For interior doors, we also work with ViewLux and ES Windows for matching hardware and glass configurations.
Common Door Replacement Problems We See in Fairfax Homes
- Dry rot at the sill plate. Fairfax’s older wood-frame homes sit under redwood and oak canopy where moisture lingers, and the sill plate under an exterior door is the first casualty. A door swap becomes a framing repair, and we scope for that from the start.
- Ignition-resistant spec missed at quote time. Deck-adjacent and street-facing doors in the Very High Fire Hazard Severity Zone need ember-resistant weatherstripping and ignition-resistant materials. Miss it at the quote and plan review stalls; we build it into the first written price.
- Out-of-square openings on hillside foundations. Homes on Fairfax’s slopes shift, and a stock 80-inch door rarely drops into an 78-7/8-inch opening without trimming or shimming. We account for settlement before ordering anything.
- Standard glass ordered where laminated or low-E was required. Fairfax’s afternoon sun hits west-facing doors hard, and a standard insulated unit can fog or warp within a few seasons. We spec the right glass the first time, even when it costs a bit more up front.
Pricing for Door Replacement in Fairfax, CA
A standard interior door replacement in Fairfax runs $650 to $1,900. Exterior doors run $1,400 to $4,800, and that range reflects what happens when we open the wall: dry rot repair, a header adjustment, or a fire-hardening upgrade can push the number toward the top. Impact-rated glass adds $500 to $1,200 to an exterior door, and custom sizing for an out-of-square hillside opening adds $300 to $800. We give you a written line-item quote before any work starts, so you see exactly where the money goes. If the scope changes, we hand you an updated written price and you approve it before we continue. Call (682) 281-2168 to schedule a free estimate.
We Also Serve Cities Near Fairfax
Our Fairfax crews regularly take door replacement jobs in Door Replacement service areas across San Anselmo, Kentfield, San Rafael, and Larkspur. Each town has its own permit office and fire-zone classification, so we scope by address, not by ZIP code. Learn more about how we handle projects across the region on our Door Replacement in Fairfax page, or call us for a straight answer about your specific property.
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 Replacement in Fairfax
Yes, exterior door replacement in Fairfax requires a building permit when the opening or framing changes, and Fairfax Municipal Code since 2022 also triggers a fire-hardening review for street-facing and deck-adjacent openings in the Very High Fire Hazard Severity Zone. We pull the permit, schedule the inspection, and handle the paperwork as part of the job. Call (682) 281-2168 and we’ll tell you whether your specific door needs one.
Fiberglass doors with a laminated glass interlayer hold up best on Fairfax hillside homes, because fiberglass resists the moisture and shade-driven rot that wood frames suffer under redwood canopy, and the interlayer adds ignition resistance for fire-zone review. Therma-Tru fiberglass doors are the ones we recommend most often here. For full sun exposure on west-facing slopes, low-E glass stops the afternoon glare and heat gain. We’ll spec the right material for your address, not just the style you like.
In Fairfax, quote changes after opening the wall almost always come from dry rot at the sill plate, a header that needs adjustment for a new insulated glass unit, or an opening that’s drifted out of square. We scope for these at the quote stage using what we can see, but older homes hide moisture damage behind trim and siding. When we find it, we show you photos and a written line-item price before we do anything extra. You approve the change; we never auto-bill it.
An exterior door replacement in Fairfax takes about three to five hours on install day, but the full calendar including the permit application and plan review typically spans one to three weeks depending on whether the door is stock or custom-sized. Fire-zone plan review can add a few days, and custom doors add two to four weeks of lead time. We give you a realistic schedule on the written quote so you’re not left waiting. Call (682) 281-2168 for an exact timeline for your door.
Many Fairfax homeowners qualify for insurance credits when the replacement door meets ignition-resistant and ember-resistant standards, and your insurance carrier confirms the credit after seeing the product spec and the passed inspection. We provide the spec sheet and the inspector’s sign-off in your job file so you can submit it directly to your carrier. It won’t apply on every policy, but we’ll tell you what to ask your agent, and the conversation costs you nothing.
Call (682) 281-2168 to schedule your free Fairfax door replacement estimate. We’ll give you a written price, a realistic timeline, and a straight answer on what your hillside home actually needs. Sean Mackey and the Juniper Windows & Doors team work exclusively on windows and doors, and we treat every Fairfax project like it’s our own front entry.
Written by Sean Mackey, Owner at Juniper Windows & Doors, serving Fairfax, CA.