Window Replacement in Fairfax - Free In-Home Measure, Written Price

Fast, Reliable Window Replacement Across Fairfax

Window replacement in Fairfax, CA typically runs $420 – $980 per window for standard insert replacements, while full-frame work on older homes lands between $1,100 – $2,400 per opening due to the jamb repair and structural work those projects demand. Most Fairfax homes fall into one of two camps: pre-1940 wood-frame bungalows near downtown or 1950s-70s ranch homes on the hillsides, and each requires a different scoping approach before anyone quotes a number. Our crews serve Fairfax directly from the San Francisco Bay Area office, and we know the difference between a Sir Francis Drake Blvd bungalow and a Cascade Canyon hillside ranch before we even park the truck. Call (682) 281-2168 for a written, line-item quote.

Call (682) 281-2168

Why Juniper Windows & Doors Is Fairfax’s Preferred Window Replacement Company

Fairfax homeowners keep calling us back because we show up with a written price that doesn’t change at the door, plus a live arrival time they can track from their phone. Sean Mackey built Juniper Windows & Doors in 2001 on a simple standard: every job gets scoped, measured, and priced before a single screw turns. No vague estimates. No “we’ll see when we get in there.” Fairfax is a town of 7,400 people, and word travels fast when a contractor actually does what they said they would.

The 365-Day Done Right Promise backs every installation in writing: if something isn’t right within a full year after install, we make it right, parts and labor included. Our technicians are background-checked and wear uniforms, so you know exactly who’s stepping through your front door on a Tuesday morning. And when you call, a real person answers. That’s not a perk; that’s the Relay Standard.

We stock parts locally for Fairfax customers across eight product lines: PGT, CGI, CWS, ES Windows, ECO Window Systems, Mr-Glass, Therma-Tru, and ViewLux. Most importantly, we measure every opening twice before ordering anything.

Window Glass Replacement in Fairfax

Window glass replacement in Fairfax runs $180 – $420 per pane for standard insulated glass units, though low-E glass and impact-rated options push toward the higher end. This is the right fix when the frame and sash are structurally sound but the glass itself is cracked, fogged from a failed seal, or simply not holding heat in a house built before insulation was standard practice. A 1950s ranch on Scenic Road with a fogged sliding door panel is a glass job; a 1920s bungalow off Bolinas Road with a rotted double-hung frame is not.

Many Fairfax homeowners ask for glass-only replacement to save money, and in the right house it works. The key is assessing whether the existing sash can actually hold a new sealed unit without crumbling. That’s a judgment call our techs make on-site, not over the phone.

When the Glass Is the Only Problem

A failed seal between panes shows up as fog you can’t wipe off, and it’s common in Fairfax homes that face full afternoon sun on west-facing slopes. Replacing just the glass restores the view and the insulation without touching trim or casing. We match the new glass’s thickness and low-E coating to the existing window so the new pane performs like the original install.

Matching Glass to a Fairfax Climate

Fairfax gets real temperature swings between morning fog and hot inland afternoons, especially up in the Deer Park area. Low-E glass is worth the upgrade on south- and west-facing windows because it cuts heat gain without darkening the glass. For hillside homes with direct sun exposure, solar heat gain coefficient matters more than most people realize, and we’ll walk you through it in plain language.

Window Sash Replacement in Fairfax

Window sash replacement in Fairfax runs $300 – $700 per sash for standard double-hung or casement windows, with custom sizes or historical profiles adding cost. The sash is the moving part that holds the glass, and in a pre-1940 bungalow near the downtown core, sashes are often painted shut, warped, or too far gone to salvage. When the sash fails, the whole window stops working even if the frame is solid.

Fairfax’s older homes often need sash work because the original wood dried out decades ago, and repeated coats of paint have locked the moving parts in place. We pull the old sash, check the jamb for square and soundness, and set a new sash matched to the existing trim so the window looks original.

Scoping Sash Work on Pre-1940 Frames

Older wood-frame bungalows around Fairfax frequently have out-of-square jambs, which means a new sash can’t just drop in and seat cleanly. The jamb needs truing up first. A contractor who bids sash replacement without checking this will hit a surprise once the old sash is out, and that surprise becomes a change order.

Why the Sash Matters More Than People Expect

A functioning window isn’t just about glass. If the sash sticks, rattles, or won’t lock, the window fails twice: it leaks air, and it can’t do its job as an operable opening. Fairfax homes on hillside lots catch more wind than valley homes, and a loose sash on a gusty ridge above Cascade Drive will rattle enough to wake you up.

Trusted Brands We Service in Fairfax

We work across the brands Fairfax homeowners ask for most, including PGT, CGI, CWS, and ES Windows. PGT’s impact-rated glass matters for hillside homes facing real wind exposure, while CWS and ES Windows serve clients who want clean sightlines and serious thermal performance. Because our teams stock local parts and coordinate directly with these manufacturers, we won’t leave a half-finished opening waiting four weeks for a backordered sash profile that someone forgot to measure. Choosing the right line for the specific house and exposure is the difference between a window that works and a compromise.

Common Window Replacement Problems We See in Fairfax Homes

• Pre-1940 bungalows with out-of-square jambs: The original wood frame has dried and racked over 80-plus years, and a new sash won’t seat without jamb repair. Flat per-window pricing from a contractor who never measured the openings will inevitably change once work begins.
• Mid-century ranch homes with original aluminum sliders: These 1950s-70s sliders served their time, but they conduct heat, leak air, and were never built for modern glass. The retrofit path is different from a wood double-hung, and it matters which one you have.
• Fogged glass on west-facing slopes: Seal failures happen, and homes above the downtown core get hit with afternoon sun that accelerates the process. A glass-only replacement resolves it, but only if the sash and frame are still sound underneath.
• Painted-shut sashes in older Fairfax homes: Multiple repaints over the decades have sealed the window permanently. Freeing the sash often reveals the deeper frame issues that should have been on the quote in the first place.

Pricing for Window Replacement in Fairfax, CA

We Also Serve Cities Near Fairfax

Our crews regularly work across San Anselmo, Kentfield, San Rafael, and Larkspur, and many of those projects start with a Window Replacement inquiry from a homeowner comparing options across the Ross Valley. If you’re in Fairfax or any town along Sir Francis Drake Blvd, the same written pricing and 365-Day Done Right Promise applies. One call covers the whole area.

FAQs About Window Replacement in Fairfax