Free in-home measure and quote - PGT, CGI and CWS impact lines compared on your actual openings, style by style
Fast, Reliable Window Replacement Across Fairfax
Window replacement in Fairfax, CA typically runs $900 – $2,400 per window installed, depending on whether you’re replacing the glass only, the sash, or the full frame. Most Fairfax homes we work on sit on hillside lots or in one of the town’s designated historic districts, which means the scope of the job often hinges on two things: what the design review board will approve, and what the existing jamb and sill actually look like once the old unit is out. If you’re in Fairfax and need a straight answer about your windows, call us at (817) 686-2228. We’ll scope it, price it in writing, and tell you exactly what the job involves before anything gets ordered.

Why Meridian Windows & Doors Is Fairfax’s Preferred Window Replacement Company
Meridian Windows & Doors is the windows-and-doors specialist within the Garrison Partners network, operating to The Garrison Standard since 2009. Elliot Vance leads the team, and every job gets a written price before any work starts. That’s not a sales line; it’s how we run the business. A meridian is a fixed line you measure everything against. That’s what the name means and how we run every install.
Fairfax homeowners call us because they’ve been burned before. A contractor no-shows, or quotes one number and the invoice comes back higher, or the caulk line looks like it was applied blindfolded. We hear it on about half our first calls. Our answer is the same every time: the price goes on paper before a single screw turns, and it does not move at the door. If the work fails within 365 days, we come back at no charge. That’s the Done Right Promise, written on every job.
Our techs are background-checked and uniformed. You know exactly who’s walking through your door. Our phones are answered by a live person around the clock, every day of the year. And we carry eight manufacturer lines, so the window we spec for your Fairfax home is the one that fits the opening and passes review, not the one sitting in a warehouse.
Window Seal Repair in Fairfax
Window seal repair in Fairfax usually means addressing a failed insulated glass unit: condensation between the panes, fogging that won’t wipe off, or a visible haze. On older Fairfax bungalows, a “seal repair” often turns into a glass-unit replacement paired with jamb or sill repair once we get the sash out. Fairfax’s damp, tree-shaded hillside lots are hard on wood frames. We’ve opened windows in the flats near downtown and found the sill soft enough to push a screwdriver through. The seal failure gets the call, but the rot is what actually needs fixing.
Glass Unit Replacement
When the seal fails on a double-pane or triple-pane unit, the insulating gas has escaped and the low-E performance is gone. The fix is a new insulated glass unit, not a whole new window. In Fairfax, expect $250 – $600 per glass unit depending on size and whether the sash needs to come out for the install. We match the existing glass type and low-E coating so the replacement doesn’t stand out from the neighbors.
Sash and Jamb Repair
Fairfax bungalows from the 1920s through the 1940s often have double-hung sashes that rack when you open them. The jamb has sagged, the balance is shot, or the wood has swollen from years of hillside moisture. Repairing the jamb and re-setting the sash typically runs $300 – $800 per opening. The work is surgical: we rebuild the frame, set the new unit, and tune the balance so the window closes square without racking.
Energy Efficient Windows in Fairfax
Energy efficient windows in Fairfax are not just about the glass. They’re about the whole opening: the frame, the weather seal, and how the sash sits in the jamb. Fairfax’s climate, with cool summers and damp winters, rewards glazing that blocks heat loss more than it blocks solar gain. Low-E glass (a thin coating that reflects heat while letting light through) is the standard we spec for most Fairfax homes.
Insulated Glass with Low-E
Replacing old single-pane windows with insulated low-E units cuts air leakage and keeps interior temperatures steadier. For a typical Fairfax bungalow, an energy-efficient retrofit running $1,100 – $1,800 per window makes sense when the existing frames are sound and the design review allows a matching sash profile. We spec PGT and CGI glass units frequently on these jobs because the thermal performance holds up in coastal-influenced microclimates.
Whole-Opening Upgrades
When the sill is rotted or the frame is too far gone, the energy fix is a full frame replacement. In Fairfax, that runs $1,800 – $2,400 per opening installed. We rebuild the rough opening, set the new frame, insulate the gap, and flash the exterior to shed water. The Garrison Code covers what our crew will and will not do on a job site: no shortcuts on flashing, no leaving the site a mess, no skipping the final walkthrough.

Trusted Brands We Service in Fairfax
We’re authorized to install and replace products from PGT, CGI, CWS, ES Windows, and four other manufacturer lines. Stocking parts for Fairfax customers matters because older homes take odd sash sizes. When a divided-light sash on a 1930s bungalow needs new glass, you can’t grab a stock unit off a shelf. We order the right profile from the manufacturer, and our Fairfax installs keep moving because we coordinate delivery before we open the wall.
Common Window Replacement Problems We See in Fairfax Homes
- Historic district conflicts: A homeowner orders stock-sized replacements before checking whether the opening sits in a Fairfax historic district. Then the sash profile and divided-light pattern don’t clear design review. We check this before anything is ordered.
- Rot behind the glass: Replacing the glass without addressing the jamb and sill rot common on older Fairfax bungalows set into damp, tree-shaded hillside lots. The new unit fails within a season.
- Over-scoped replacements: Scoping a whole-house replacement when only the failing sash and weather seal actually need work. That inflates the bid before the first measurement and wastes money on openings that are fine.
- Racking sashes on sloped lots: Homes off Bolinas Road and other hillside streets settle over time. A window that functioned fine in May starts binding in October. We rebuild the jamb and reset the balance instead of replacing the whole unit.
Pricing for Window Replacement in Fairfax, CA
Here’s what Fairfax homeowners can expect. Glass unit replacement (failed seal, fogged glass): $250 – $600 per unit. Sash and jamb repair: $300 – $800 per opening. Full frame replacement with a new insulated low-E unit: $1,800 – $2,400 per window. Insert window replacement (new sash and frame inside the existing opening): $900 – $1,400 per window. The price drivers are the size of the opening, whether the job triggers historic review, and what we find once the old unit is out. We put the price in writing before any work starts, and it does not move. Call (817) 686-2228 for a free estimate on your Fairfax home.
We Also Serve Cities Near Fairfax
Our crews serve Fairfax and the surrounding Marin County communities. If you’re in San Anselmo, Kentfield, San Rafael, or Larkspur, the same team handles your window replacement with the same written pricing and 365-day guarantee. Read more about our Window Replacement in Fairfax service or visit our main Window Replacement page for the full scope of what we do.
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 Window Replacement in Fairfax
Yes, if your home sits in one of Fairfax’s designated historic districts, window replacement often requires design review approval before any work begins. The review board cares most about the sash profile, frame color, and divided-light pattern matching the existing house. We pull permits and handle the review paperwork for Fairfax jobs, and we spec the replacement to match what the board will approve. Call (817) 686-2228 and we’ll check your address against the historic district map before quoting.
Most Fairfax window replacements take two to four weeks from first measurement to final inspection. The measurement visit takes about an hour. Ordering a custom sash or full frame from PGT, CGI, or CWS typically takes two to three weeks. Installation is usually one to two days, and the final inspection happens within a few days after that. If historic review is required, add one to two weeks for the board’s approval. We’ll give you a calendar at the first visit.
Four things: the size of the opening, whether the frame needs to be rebuilt or just re-glazed, whether the job triggers historic district review, and what we find once the old unit is out. Rot and racking jams add scope. A simple glass unit replacement runs $250 – $600. A full frame replacement runs $1,800 – $2,400. The price goes on paper before work starts, and it does not move at the door. Call (817) 686-2228 for an exact quote.
Modestly. Fairfax’s climate is cool, with summer highs rarely pushing past 85 degrees, so the bigger payoff is winter heat retention and fog resistance. Low-E glass reduces heat loss through the window and cuts condensation on the interior pane. For most Fairfax homes, the energy upgrade makes sense when the existing window is single-pane or the seal has failed. The comfort improvement is real; the utility savings are secondary. We’ll give you an honest assessment before you spend the money.
We stop, photograph the damage, and bring you out to look at it before doing anything else. If the jamb or sill is rotted, the repair is added to the scope and priced on the spot. You approve the additional work before we touch it. No surprise invoices. If the damage is structural beyond a window repair, we stop and recommend a general contractor from the Garrison Partners network. The price we quote for rot repair is the price you pay.
Schedule Your Fairfax Window Replacement Estimate
If your windows are fogged, drafty, racking, or heading for a historic district review, call Elliot Vance and the team at Meridian Windows & Doors. We’ll send a background-checked, uniformed technician to your Fairfax home, measure every opening, and put a written price in your hands before any work begins. That price is backed by the 365-Day Done Right Promise: if it’s not done right, we make it right, in writing, on every job. Call (817) 686-2228 to schedule your free estimate.
Written by Elliot Vance, Owner at Meridian Windows & Doors, operating to The Garrison Standard since 2009.










Before
After
Before
After
Before
After