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CGIFree in-home measure and quote - PGT, CGI and CWS impact lines compared on your actual openings, style by style
Get your free estimateFast, Reliable Window Replacement Across Novato
Window replacement in Novato usually means one of two things: swapping a worn aluminum slider for a dual-pane unit that actually seals, or pulling a rotted wood sash before the framing behind it gets worse. Most full-frame replacements in Novato run between $850 and $1,400 per opening, and insert replacements typically land between $550 and $900. We know those numbers matter because you’re pricing a decision, not browsing a catalog.
Our crews work throughout Novato every week, from Ignacio to Hamilton Field to the downtown bungalow streets off Grant Avenue. Keith Yamada leads our team, and he’ll be the one walking your property line before any price gets written down. Call (831) 480-4124 for a free estimate, and we’ll tell you exactly what your windows need before you spend a dollar.
Why Lightwell Windows San Francisco Is Novato’s Preferred Window Replacement Company
Homeowners here have been burned before. A crew shows up late, leaves dust on the furniture, and the final invoice doesn’t match the number they quoted over the phone. That’s the opposite of how we work. Lightwell Windows & Doors operates on the Cedarwell Care Promise, which has been our standard since 2010. Every job starts with a written price. Every crew member is background-checked, uniformed, and expected to follow the C.A.R.E. values: Clean up like it’s our own home, Ask before we move or touch anything, Respect your family’s time and quiet hours, Explain the price before the work starts.
Novato’s housing stock is specific. We know the 1960s tract homes off San Marin Drive have aluminum sliders that corrode at the sill, and we know the older Ignacio bungalows hide rot where storm water collects in the lower rail. Our Window Replacement team has seen these failures enough times to spot them before they turn into a bigger opening than you planned for. The 365-Day Done Right Promise is stamped on every job we do in Novato. If the finished work isn’t right, we make it right. No debate, no countdown. And when you call us at any hour, a live person answers, not a voicemail tree.
Styles & brands we work with










Window Glass Repair in Novato
Window Glass Repair in Novato usually means a cracked pane on a single-pane wood sash, or fogged glass in an older dual-pane slider that’s lost its seal. We can replace just the insulated glass unit in many cases, skipping a full frame replacement and saving you hundreds per opening. Expect glass-only repair to run between $180 and $380 per pane in Novato, though a failed seal on a large patio door can push toward $500 because the glass panel is heavy and harder to handle safely.
When Repair Makes More Sense Than Replacement
A hairline crack in a single pane doesn’t always mean the whole window is done. If the frame is square, the tracks are sound, and the flashing isn’t compromised, replacing the glass gets you another five to ten years. We’ll tell you honestly when that’s the right call, because chasing a cheap fix on a window that’s already failing at the frame costs you more in the long run.
Fogged Glass and Failed Seals
Condensation between the panes means the seal is gone. The glass unit can be replaced without touching the frame if the frame itself is still working. In Novato’s wet winters, failed seals show up fast because temperature swings between fog-damp mornings and dry afternoons stress the sealant. We carry insulated glass units sized to the original aluminum frames common in Ignacio and San Marin, so the replacement doesn’t look like an obvious patch.
Window Pane Replacement in Novato
Window Pane Replacement in Novato is a step up from glass-only repair. The pane itself is replaced and the surrounding glaze, putty, or gasket gets renewed so water stops finding its way into the sash. Most pane replacements in Novato run between $250 and $450 per pane for standard sizes on wood double-hungs, and $300 to $550 for oversized panes on the wide picture windows you see in the 1970s ranchers north of downtown.
Wood Sash Pane Work in Older Novato Bungalows
The pre-war bungalows near Novato’s downtown have true divided-light wood sashes, and those panes sit in glazing compound that eventually hardens and cracks. When winter rain hits, water wicks into the lower rail and starts the rot cycle. We cut out the failed compound, reset the pane, and re-glaze with a modern sealant that handles the North Bay’s wet months without cracking.
Aluminum Frame Pane Work in Tract Homes
The aluminum sliders from the 1960s through 1980s often have channel-glazed panes that can’t be re-glazed the way wood can. If the frame is still square and the track isn’t corroded, we replace the pane with a correctly sized glass unit and re-seal the channel. If the frame has corroded at the sill, which we see constantly in Ignacio, the pane work won’t hold. The whole unit needs to go.
Trusted Brands We Service in Novato
We’re not tied to one manufacturer, and that matters for Novato’s mix of home styles. A Mr-Glass unit might be the right fit for a 1980s stucco tract home where the original window is a strange size, while a PGT impact-rated unit goes into an Ignacio patio door that takes wind-driven rain off the Petaluma River corridor. We also carry Therma-Tru for door replacements tied into window openings, and ViewLux for homeowners who want a clean, modern sightline without spending on custom millwork. We keep local stock and can source parts fast, so you’re not waiting weeks for a common size.
See the difference
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AfterCommon Window Replacement Problems We See in Novato Homes
- Corroded aluminum slider sills in 1970s tract homes. Fog-drip from the Petaluma River lingers on the north side of the house, and the aluminum channels pit and corrode. Rollers wear out, the door binds, and eventually the panel won’t move at all. The fix is a full replacement, not a roller swap.
- Rotted lower rails on wood double-hungs in older Ignacio bungalows. Original flashing was never integrated with the building paper, so storm water collects in the lower rail and rots it from the inside out. By the time you see peeling paint, the wood is usually gone.
- Hidden framing rot under stucco around 1980s window openings. Waterproofing fails at the rough opening, moisture seeps into the jamb, and the framing rots behind the stucco. You won’t see it until the window is pulled. We write allowances into the contract so this doesn’t become a surprise invoice.
- Single-pane windows with winter condensation. Cool, wet winters and fog-influenced mornings mean single-pane glass sweats. The condensation runs down the glass, sits on the sill, and eventually warps the wood or corrodes the aluminum. Dual-pane replacement stops the cycle.
Pricing for Window Replacement in Novato, CA
A full-frame replacement in Novato typically runs $850 to $1,400 per opening. Inserts come in lower, around $550 to $900 per opening. Glass-only work runs $180 to $380 per pane, and pane replacement with re-glazing runs $250 to $550 depending on the size. The big variables are the condition of the rough opening once the old window comes out, the type of framing you’re working with, and whether flashing and waterproofing need to be redone. We write the price before the first tool comes off the truck, and if we find hidden rot, you’ll get an allowance update in writing before we do anything else. A light well is what brings daylight deep into a building. That’s what a well-installed window should do for your home.
We Also Serve Cities Near Novato
If you’re outside Novato but still in the North Bay or East Bay, we serve Albany, Berkeley, Emeryville, and Martinez. Our crews dispatch from the brand’s San Francisco Bay Area office and schedule locally, so you’re not waiting on a truck from another county. Check our Novato page for local details, or call and we’ll route you to the right team.
Serving Novato, CA - Our Local Coverage Area
We’re based in the Novato 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 Novato
When we open an Ignacio wall for a patio door replacement, the city may require the rough opening to be brought up to current seismic code, which usually means additional studs, anchor bolts, or a deeper header depending on the span. Novato’s building code follows California seismic standards, so any opening wider than the original is a trigger. We recently replaced a failed aluminum sliding patio door in Ignacio with a new impact-rated PGT unit. The original jamb had pulled away from the studs after decades of wind-driven rain, and once we opened the wall we found the rough opening was both undersized and out of square. Our crew reframed the opening, installed new flashing and waterproofing, and upgraded the framing before setting the new door. The work took one extra day and the cost was covered by the written allowance we had already included in the estimate. Call (831) 480-4124 and we’ll walk through what your specific opening is likely to need.
Yes, Novato requires a permit for full-frame window replacements and for any change to the rough opening size. Insert replacements that fit within the existing frame typically don’t require one. If you have stucco, a full-frame job means cutting back the stucco around the opening, installing new flashing, and then patching the stucco to match. We coordinate the permit process, and we take care of the stucco patch so the finished wall looks like the window was always there. Call us for an exact rundown on your home’s situation.
Condensation between the panes means the seal has failed, and the insulated glass unit itself is done. The frame can sometimes be saved, but in Novato’s 1970s tract homes, the sill is often corroded from years of fog-drip off the Petaluma River. If the frame is sound, we replace the glass unit and re-seal the channel, which runs $180 to $380 per pane. If the sill is pitted and the rollers are worn, the whole unit needs to go. We’ll tell you which one applies to your windows before we quote anything.
A retrofit means we keep the existing wood frame and install a new sash and balance system inside it. On a downtown bungalow with original wood double-hungs, this preserves the architectural character and usually costs $500 to $800 per window. Full replacement means pulling the entire frame, which is necessary when the jamb has rot, the weight pockets are packed with failed insulation, or the rough opening needs re-flashing. Full-frame replacement on a bungalow in Novato runs $950 to $1,400 per opening, plus whatever the framing needs once we open it up.
We write a framing allowance into every full-frame replacement contract in Novato, especially on stucco homes from the 1980s where waterproofing at the rough opening was often undersized. If we pull the window and find rotted studs or a failed sill plate, we photograph it, show you the area, and give you a written price for the repair before we cut anything else. Then we reframe, re-flash, and waterproof the opening before the new window goes in. No surprise invoice at the end. Call (831) 480-4124 to schedule a free estimate and we’ll explain exactly what your walls are likely to show us.
Written by Keith Yamada, Owner at Lightwell Windows San Francisco, serving Novato since 2010.
Ready to get a real number for your window replacement? Call (831) 480-4124 for a free estimate. Keith or one of our team will answer, ask about your windows, and schedule a time to look at the openings. Shoe covers on the floor, a written price before anything starts, and a cleanup photo before we leave. That’s how we work in Novato.
Six Reasons Homeowners Choose Lightwell Windows San Francisco
Laminated glass and reinforced frames hold up to wind-driven rain, hail and flying debris, so your openings stay sealed when the weather turns.
Low-E insulated impact glass from our manufacturer lines commonly cuts monthly cooling bills 20-30%.
Laminated impact glass shuts out up to 40% of outside noise - traffic, neighbors, weather.
Monitoring services run $30-90 a month. Laminated impact glass resists forced entry around the clock, with no subscription.
Tighter seals and insulated glass even out hot and cold rooms and stop the drafts at the frame.
A full impact package upgrades curb appeal, buyer confidence and appraised value in one project.