Free in-home measure and quote - PGT, CGI and CWS impact lines compared on your actual openings, style by style
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After
Before
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Before
AfterFast, Reliable Patio Door Installation Across Fairfax
Patio door installation in Fairfax, CA usually means one of two jobs: swapping a worn sliding door for a new one the same size, or reframing a wall opening for a wider or taller unit. Most replacements in Fairfax run between $2,800 and $6,200 installed, depending on door type, glass package, and whether the rough opening needs reframing. Our crews know this town’s housing stock, its hillside lots, and its permit path. Call (817) 686-2228 and we’ll put a written price in front of you before any work is scheduled.
We’re Meridian Windows & Doors, part of the Garrison Partners family, and we’ve held every Fairfax job to The Garrison Standard since 2009. The name matters to us: a meridian is a fixed line you measure everything against. That’s how we run every install, with a written price that does not move at the door and a 365-Day Done Right Promise behind every patio door we set.
Key Takeaways
- Patio door replacement in Fairfax typically runs $2,800 to $6,200 installed.
- Same-size swaps usually need a simple permit; opening-size changes can trigger Fairfax Title 24 energy review and hillside design review.
- Impact-rated glass is not required for most Fairfax homes unless the opening changes enough to change the energy calculation.
- Our price goes in writing before work starts, and the 365-Day Done Right Promise covers labor and install for a full year.
- Call (817) 686-2228 for a free estimate. A live person answers, every time.
Why Meridian Windows & Doors Is Fairfax’s Preferred Patio Door Installation Company
Fairfax homeowners tend to ask sharper questions than most. That’s the Marin County way: people here read the permit paperwork, they want to know the glass spec, and they’ve usually dealt with at least one contractor who quoted low and showed up late. Our approach fits that audience. Elliot Vance runs our crews, and every technician who knocks on a Fairfax door is background-checked, uniformed, and trained on the exact product lines we carry.
We answer our phones with a live person 24/7, not a voicemail loop. When a Fairfax customer calls about a sliding door that’s dragging or a patio door that won’t latch, they speak to someone who can schedule a site measurement. Scheduling and dispatch for Fairfax are coordinated from our San Francisco Bay Area office, so response times stay consistent across Marin.
We also carry eight manufacturer lines: PGT, CGI, CWS, ES Windows, ECO Window Systems, Mr-Glass, Therma-Tru, and ViewLux. That matters in Fairfax because the right door for a 1950s hillside ranch is not necessarily the right door for a newer Deer Park home. We spec the door to the house, not the other way around.
Our Patio Door Installation process starts with an on-site measure, not a photo quote. We’ll check the jamb, the threshold, and the floor level before we ever order a door. Then we put a line-item price in writing. If anything changes later, you’ll know why and what it costs before we touch a tool.
Patio Door Replacement in Fairfax
Patio door replacement in Fairfax is the single most common job we do for this town, and the reason is simple: houses here are older, the lots are sloped, and decades of winter rain take a toll on thresholds, tracks, and jamb framing. A 1960s ranch off Bolinas Road with an original aluminum sliding door is a typical Fairfax call for us. The floor has settled 3/8 inch out of level, the track is corroded from wind-driven rain, and the door binds every time it opens. That’s a replacement, not a repair.
What the Job Involves
We remove the old door, then check the rough opening for square and level before ordering anything. If the framing is solid, we set the new unit, flash it correctly to drain water away from the sill, and level the threshold. If the opening is out of square, we reframe it. Most same-size patio door replacements in Fairfax take one working day, plus a follow-up inspection if the permit path requires one.
What It Costs in Fairfax
A standard patio door replacement in Fairfax, same size, with a low-E insulated glass unit, runs $2,800 to $4,400 installed. Wider units, multi-slide doors, or doors that need reframing push the range toward $5,000 to $6,200. Compare that to a patch-and-caulk repair that fails again in two winters. The replacement is the cheaper decision over time.
Sliding Door Replacement in Fairfax
Sliding door replacement in Fairfax deserves its own planning step because of how the light works here. A south-facing slider on a Fairfax hillside gets hammered by afternoon sun and winter wind-driven rain. The glass spec matters: low-E glass, which is a thin coating that reflects heat while letting light through, keeps the interior comfortable without tinting the view. But the wrong SHGC (solar heat gain coefficient) on a south-facing opening can turn a living room into an oven by 3 p.m.
Why the Glass Spec Matters Here
Fairfax is not in the Florida HVHZ, so most sliding door replacements here need no Miami-Dade NOA or large-missile rating. But replacements that change the opening size can trip Marin’s Title 24 energy rules. That changes the U-factor and SHGC you need to pass inspection. We determine the correct glass spec by permit path, not storm code. That’s the difference between an install that passes on the first try and one that gets flagged.
When Fairfax Homeowners Call Us
Sliding door replacement in Fairfax usually starts with a call when the door won’t glide, the lock won’t engage, or condensation appears between the glass panes. In a hilly town like Fairfax, these issues compound: a door that drags on a settled track eventually chews through rollers and bends the frame. We’d rather replace it before it fails completely, and the written estimate is free to get.
Trusted Brands We Service in Fairfax
We install and replace patio doors from CGI, CWS, and ES Windows, among the eight manufacturer lines in our portfolio. Fairfax homeowners come to us with existing units from all of those brands and more. Since we’re authorized to install and replace those products, we can order exact-fit hardware and replacement glass panels without the markup a general contractor tacks on. Local parts availability means most Fairfax patio door replacements go from measurement to install in under two weeks, weather permitting.
Common Patio Door Installation Problems We See in Fairfax Homes
- Out-of-square rough openings: Fairfax homes from the 1950s and 1960s have settled floors and angled jambs. We measure on site before ordering anything. A door ordered from a photo can end up 3/8 inch too wide for the opening.
- Skipping the Title 24 check: Changing the opening size or glass spec without confirming Marin’s energy requirements can force a re-order and re-inspection. We pull the permit and confirm the energy path first.
- Winter rain delays: Fairfax’s wet season and narrow, tree-lined residential driveways can slow delivery and stretch an installation window. We account for that in the schedule, not after the fact.
- Failed flashing on south-facing patios: Wind-driven rain against a Bolinas Road hillside door rots the jamb over time. We flash every exterior to drain properly, then pass final inspection.
Pricing for Patio Door Installation in Fairfax, CA
A typical patio door installation in Fairfax runs from $2,800 to $6,200 installed. The main cost drivers are door size, glass package, and whether the rough opening needs reframing. Here’s the honest breakdown:
- Standard sliding patio door, same size: $2,800 to $4,400
- Wider multi-slide or French patio door: $4,500 to $6,200
- Reframing a rough opening: Add $800 to $1,500
- Permit and inspection costs: $200 to $600, depending on Fairfax’s path
Every price goes in writing before work starts. The 365-Day Done Right Promise covers the entire installation for a full year. If it fails, we return at no charge. Call (817) 686-2228 for a line-item quote. The estimate is free, and it does not obligate you to anything.
We Also Serve Cities Near Fairfax
Our Patio Door Installation in Fairfax work regularly takes us into neighboring Marin communities. We schedule replacement jobs in San Anselmo, Kentfield, San Rafael, and Larkspur on the same measurement and install calendar we run for Fairfax. If you live just over the town line, the same written pricing and 365-Day guarantee apply.
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 Patio Door Installation in Fairfax
Yes. A same-size swap is usually a simple over-the-counter permit, but changing the opening size or the glass configuration triggers a Fairfax Title 24 energy review and, on some hillside lots, design review. We handle the permit paperwork and coordinate the inspection. Call (817) 686-2228 and we’ll confirm your property’s specific path before we order anything.
No. Fairfax is not in a hurricane zone, so large-missile ratings and Miami-Dade NOAs are not the deciding factor. What matters is the U-factor and SHGC required under Marin’s Title 24 rules, and those are determined by the door’s orientation and the size of the opening. We spec the glass to the permit path, not to a storm code that doesn’t apply here.
A same-size replacement typically takes one working day on site. The full calendar, including measurement, ordering, and inspection, runs about two weeks for a standard unit. Multi-slide or custom-width doors can take three to four weeks. Rain and narrow Fairfax driveways can add a day or two in winter, which we build into the schedule up front.
Only three things: the rough opening is more out of square than the measurement showed, a permit revision is required because the opening size changed, or the homeowner chooses a different glass package after the initial spec. All three are confirmed and priced in writing before we proceed. The number on the estimate does not move otherwise. Call (817) 686-2228 to get your written quote started.
Yes. We’re authorized to install and replace products from CGI, CWS, and ES Windows, plus five other manufacturer lines. If your existing Fairfax patio door is one of these brands, we can order exact-fit replacement parts, glass panels, and hardware directly from the manufacturer. That keeps lead times short and pricing honest.
Get Your Fairfax Patio Door Priced in Writing
If you live in Fairfax and your patio door is dragging, fogging, or failing, call (817) 686-2228. We’ll schedule a site measurement, spec the right door for your opening and your orientation, and put a line-item price in front of you before any work starts. The estimate is free, the guarantee is written for 365 days, and a live person answers the phone around the clock. That’s how we run every Fairfax patio door installation.
Written by Elliot Vance, Owner at Meridian Windows & Doors, serving Fairfax since 2009.