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 Window Installation Across Fairfax
Most window installation jobs in Fairfax take one to two days once the units arrive, and typical double hung replacements run $900 – $1,800 per opening with labor included. What makes this town different is the permit path: much of Fairfax sits in hillside and creek-side overlay zones, so a like-for-like swap that’s over-the-counter in San Anselmo can require a design-review sign-off here. That’s why we send a written price before anything starts, not a vague estimate that morphs later. Call (682) 281-2168 to get your project scoped by a team that knows Fairfax’s planning desk, not just its streets.
Why Juniper Windows & Doors Is Fairfax’s Preferred Window Installation Company
We’re the windows-and-doors specialist inside the Relay Home Co. family, founded in 2001, and led by Sean Mackey. Fairfax homeowners call us because every job gets a written price before a single screw turns, and because the 365-Day Done Right Promise covers parts and labor in writing for a full year after installation. If something isn’t right, we make it right. No charge, no argument.
Dispatch and scheduling for Fairfax are coordinated from our San Francisco Bay Area office, and our crews work in Fairfax weekly. That means we know the difference between a flat lot off Center Boulevard and a downslope driveway off Deer Park. Background-checked, uniformed technicians show up with a live arrival time you can track, and you get before-and-after photos of every opening we touch. The Relay Visibility Standard, named for the family brand, means you’re never guessing who’s coming or what’s already been done.
This is Window Installation done the way Fairfax expects: honest numbers, local know-how, and a real person who answers the phone.
Double Hung Windows in Fairfax
Double Hung Windows in Fairfax are the most common replacement we install, especially in the pre-1950 bungalows and shingled houses that line streets off Sir Francis Drake Boulevard and Bolinas Road. The original sash in these homes is often painted shut, the jamb wood soft from decades of fog-belt moisture, and the rough opening no longer square. A proper job means cutting out the old jambs, shimming and flashing the opening, and setting new units with low-E insulated glass tuned to the exposure.
For a standard Fairfax double hung, expect $1,050 – $1,750 per window, including tear-out, new jamb work, trim, and haul-away. Houses in the hillside overlay zones can run higher when access forces hand-carrying and staged installs.
Why Fairfax Homeowners Choose Double Hung Over Sliders
Double hungs give you two operable sashes, which matters in Fairfax’s microclimates: morning fog off the canyon and afternoon sun from the west. You can open the top sash to vent warm air while keeping the lower sash closed, a real benefit in rooms that overheat by 4 p.m.
Old-Home Jamb Repair Before New Sash
On homes built before 1950, the rough opening is rarely plumb. We inspect the jamb condition before ordering, so you’re not paying for a sash that won’t seat correctly. If we find rot, we fix it before the new window goes in, and that cost is in the written price.
Vinyl Windows in Fairfax
Vinyl Windows in Fairfax are the practical choice for homeowners who want low maintenance and solid thermal performance without the upkeep of painted wood. The local climate, with its damp gray winters and hot dry summers, punishes wood sash over time. Vinyl doesn’t swell, peel, or need repainting, which explains why we’re replacing so many failed wood units with vinyl on the flatter streets around Manor and Cascade.
Expect $800 – $1,500 per vinyl opening in Fairfax, depending on size and whether we’re doing a direct insert into a sound jamb or a full tear-out with new trim. Larger units, like a picture window paired with side casements, land at the higher end.
Why U-Factor Matters in the Hollow
Fairfax sits in a valley that traps cold air in winter. A vinyl frame with a lower U-factor, typically 0.27 – 0.30, cuts heat loss measurably compared to older aluminum frames. We explain the numbers in plain language, then let you pick the glass package that fits the room’s sun exposure.
Insert vs. Full-Frame Replacement
If your existing jamb is straight and dry, an insert replacement preserves interior trim and costs less in labor. If the jamb is rotted or the house has settled, a full-frame install is the honest fix. We quote both paths in writing, and you choose before work begins.
Trusted Brands We Service in Fairfax
We carry eight product lines, and for Fairfax projects we most often install CGI, ES Windows, and ECO Window Systems. CGI’s impact-rated glass is built to resist wind-borne debris without shattering, a genuine consideration on exposed hillside lots. ES Windows offers some of the slimmest sightlines we can get, which matters when you’re replacing windows on a 1920s bungalow and want to keep the original character. ECO Window Systems covers vinyl and thermally broken aluminum at a price point that makes sense for rental-friendly upgrades. Because our Bay Area office stocks parts for these lines locally, Fairfax customers aren’t waiting on a slow out-of-state order when a sash or balance needs replacing.
Common Window Installation Problems We See in Fairfax Homes
- Jambs rotted by fog and old age: Homes built before 1950 along Creek Road and the lower hills often have soft, out-of-square openings. You can’t set a new sash correctly until the rough opening is repaired, and we quote that work upfront.
- Hillside access killing the schedule: Steep driveways off streets like Scenic Road and Redwood Road mean delivery trucks can’t stage glass at the door. Units get hand-carried, which adds labor and demands careful sequencing.
- Planning review surprises: If your address falls in a hillside or creek-side overlay, the town may require design review before you can swap windows. We flag this early so the calendar doesn’t blow up mid-job.
- West-facing heat gain on warm afternoons: Rooms facing the valley’s western slope cook in late summer. We spec glass with a moderate SHGC for those exposures, which balances heat rejection with useful passive gain in winter.
Pricing for Window Installation in Fairfax, CA
Here are honest Fairfax ranges, not vague “depends” answers. Double hung windows run $1,050 – $1,750 installed. Vinyl inserts start around $800 per opening and climb to $1,500 for full-frame work. Casement and awning units typically land at $1,200 – $2,100. Bay and garden windows, which need structural framing, run $3,000 – $6,500 as a realistic floor. The three cost drivers unique to Fairfax are permit review, jamb repair on older homes, and hillside access labor. Every quote includes a written line-item breakdown before work starts, and the number doesn’t change unless you change the scope. Call (682) 281-2168 for a free estimate on your Fairfax project.
We Also Serve Cities Near Fairfax
Our crews work throughout central Marin, including San Anselmo, Kentfield, San Rafael, and Larkspur. If you’re just outside Fairfax, we bring the same written pricing, live arrival times, and 365-Day Done Right Promise to your project. Same team, same standard.
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 Installation in Fairfax
Yes, and Fairfax is stricter than its neighbors. Most window replacements that are like-for-like still route through planning review because the town sits in designated hillside and creek-side overlay zones. That means a simple swap that’s over-the-counter in San Anselmo can need a design-review sign-off here. We handle the paperwork and build review time into the schedule, so there’s no surprise delay. Call (682) 281-2168 and we’ll check your address before you commit.
Most installations take one to two days of on-site work per opening, but the full calendar is longer. Permits add two to six weeks depending on the overlay review, and product lead times run four to eight weeks for most lines we carry. Plan on six to ten weeks from signed contract to finished glass on a typical Fairfax job. Call (682) 281-2168 for a schedule built around your address, not a generic timeline.
The honest answer: rotted jamb repair, hidden structural issues behind old trim, and access complications on hillside lots. Those three are common in Fairfax’s pre-1950 housing stock. We quote jamb work and access labor in the initial written price whenever we can see the condition. If we find hidden damage after tear-out, you approve the change before we proceed. The price never moves without your sign-off. Call (682) 281-2168 to get a written quote that reflects what we actually see.
For most Fairfax homes, double hung is the better match, especially on older houses where the look matters. Vinyl is the smarter choice if you want zero maintenance and lower cost per opening. A hybrid approach works well too: double hung on the street-facing rooms, vinyl on the less visible sides. We’ll walk you through both lines, show you real samples, and let you mix materials without pressure. Call (682) 281-2168 for an estimate on either option.
Yes, measurably. Low-E insulated glass units with the right SHGC for the exposure cut afternoon heat gain in west-facing rooms and reduce winter heat loss in the valley’s cold pockets. Our crew replaced double hungs on a 1920s bungalow off Bolinas Road, and the homeowner noticed the front room held afternoon heat better within the first warm week. We spec the glass per orientation, not one package for every window. Call (682) 281-2168 to get your rooms evaluated.
Every job in Fairfax starts with a written price. No estimate that morphs into a surprise invoice. Call (682) 281-2168 to schedule your free estimate, and you’ll get a live arrival time, a straight answer on permits, and a number that doesn’t move unless you change the scope.
Written by Sean Mackey, Owner at Juniper Windows & Doors, serving Fairfax and central Marin.