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

Fast, Reliable Window Replacement Across Berkeley

Replacing windows in Berkeley means working with a house that’s often 90 to 130 years old, a marine fog cycle that never really stops, and a city that takes historic preservation seriously. A typical flatlands Craftsman bungalow window replacement runs $900-$1,800 per opening for a standard double-hung with low-E insulated glass, while hills homes above the fire scar usually land between $1,200 and $2,400 per unit once fire-rated glazing enters the picture. We’ve been replacing windows since 2009, and we know exactly what Berkeley’s building stock throws at you. Call (903) 354-7134 and we’ll give you a written price before any work starts.

Call (903) 354-7134

Why Westlight Windows & Doors Is Berkeley’s Preferred Window Replacement Company

Westlight Windows & Doors is an independently owned and operated Kingswell location, led by Owen Satterfield. We carry eight manufacturer lines including PGT, CGI, CWS, and ViewLux, so the product matches the job rather than the other way around. We also offer our Door Installation in Berkeley for homes needing entry or patio door upgrades alongside their windows. Every Berkeley project gets the Kingswell Guarantee: a written price before work begins, a committed arrival window, a clean job site, and a written guarantee on the completed work. If something fails within the guarantee period, we come back and fix it at no charge. That’s not marketing language. It’s in writing, handed to you when we finish.

Berkeley homeowners have been burned before. A contractor who no-shows. A price that jumps at the door. A seal that fogs six months after install. We hear those stories on nearly every estimate visit. So we built our process to address them directly. Window Replacement is our core trade, not a side line. Our technicians are background-checked and uniformed, so you know who’s walking through your door. And when you call, a real person answers, 24 hours a day, 7 days a week. No voicemail box, no chatbot.

We work all over Berkeley regularly: the flatlands off Shattuck Avenue, the hills above Claremont Canyon, the neighborhoods around the Gourmet Ghetto, the Craftsman-heavy streets near San Pablo Park, the post-1991 fire rebuilds off Grizzly Peak Boulevard. Dispatch and scheduling are coordinated from our San Francisco Bay Area office, and crews serve Berkeley locally, so we’re not driving from three counties away when you call with a binding window or a failed seal.

Window Glass Replacement in Berkeley

Window Glass Replacement in Berkeley usually means swapping failed insulated glass units, cracked panes, or single-pane sashes that have finally gone cloudy from seal failure, and it typically costs $350-$800 per pane depending on size, glass type, and whether we’re matching a historic profile. Marine fog is the culprit more often than not. Berkeley’s daily wet-dry cycling works its way into old glazing, breaks down the putty, and eventually gets between the panes.

Insulated Glass Unit Swaps

Many Berkeley flatlands homes still carry single-pane wood sashes. When the sash itself is sound, we can often replace just the glass with a double-pane low-E unit that meets California Title 24 energy code. On a pre-1930 Craftsman, this usually means matching the original divided light pattern with an internal grid or true divided lites so the Landmarks Preservation Commission review goes smoothly.

Historic Glass Matching

On designated historic structures, the Landmarks Preservation Commission often requires retaining the original wood-sash profile and true divided lights while the energy code demands double-pane low-E glazing. We’ve worked through that dual-compliance tension on dozens of Berkeley homes. The answer is usually a custom-ordered double-pane unit with a simulated divided light bar applied to both faces of the glass, plus a wood sash that matches the original profile within an eighth of an inch.

Window Sash Replacement in Berkeley

Window Sash Replacement in Berkeley runs $450-$1,100 per sash and becomes necessary when marine-fog rot has gone too deep, the sash has swollen and bound permanently in its frame, or the LPC requires a new sash to match a documented original profile. The fog doesn’t freeze, so the damage creeps. A sash can look fine for years while rot eats away inside the joinery. By the time you see peeling paint and soft wood at the corners, the lower rail is usually gone.

Rot Repair vs. Full Sash Replacement

Sometimes we can save a sash with an epoxy consolidant and a Dutchman patch in the lower rail, usually $200-$400. Most of the time, on a Berkeley flatlands bungalow with original single-pane wood double-hungs, the sashes are too far gone and full replacement is the only option that holds up. We’ll tell you which one our carpenter would choose, and why, and we’ll put that recommendation in writing with the price.

Matching Historic Sash Profiles

When we replace a sash on an LPC-reviewed home, the new sash gets a custom milled profile to match the original ogee or bevel detail. We cut mortise-and-tenon joinery, not butt joints with staples. Then we bed the glass in glazing compound the old way and finish the sash to match the existing painted or natural wood finish. This is slower work, and it costs more than a standard insert, but it’s the only way to pass a Berkeley Landmarks Preservation Commission review while keeping the home’s character intact.

On a brown-shingle Craftsman off Shattuck Avenue in the flatlands, our crew pulled a rotting original double-hung sash and found the rough opening framed undersized with no header, plus knob-and-tube wiring running tight against the jamb. We wrote the reframing and a licensed electrician’s re-route as line-item allowances in the contract, got the homeowner’s written sign-off on the added scope, then set a PGT double-hung with low-E insulated glass tuned to a Title 24-compliant SHGC and matched the original true divided lights for LPC review. That’s how a Berkeley window job actually goes when it’s done right.

Trusted Brands We Service in Berkeley

We carry and service eight manufacturer lines, so we’re not married to whichever brand gives us the best margin. For Berkeley hills homes in the Very High Fire Hazard Severity Zone, we lean on PGT and CGI for impact-rated and tempered glazing assemblies. For flatlands historic work, ViewLux and CWS give us the sash-profile and divided-light flexibility the Landmarks Preservation Commission wants to see. We stock local parts for Berkeley customers and can order anything within days, not weeks. The homeowner gets genuine product choice, not a forced fit.

Common Window Replacement Problems We See in Berkeley Homes

• Rot hidden behind original single-pane wood sashes. The flatlands Craftsman and brown-shingle homes absorb marine fog every day, and the wet-dry cycling swells and binds the sash until the jamb itself gives out. By the time you see it on the interior, the structural wood behind it has often failed.
• Undersized or missing headers and knob-and-tube wiring. Pre-1930 Berkeley bungalows were framed for a different era, and once we open the wall to set a new window, the permit triggers framing and electrical upgrades. We write these as allowances in the contract and get written sign-off before any added work begins.
• Very High Fire Hazard Severity Zone glazing in the hills. Homes above the 1991 Tunnel Fire scar need tempered or fire-rated glazing assemblies, which eliminates most standard product lines. Homeowners are often surprised by both the narrower selection and the higher per-unit cost.
• Failed waterproofing around original window openings. Berkeley’s fog and winter rains keep exterior trim and flashing perpetually damp. We find leaks that have been slowly soaking the framing for years, and unless we fix the flashing and drainage plane when we set the new window, the next window will rot from the outside in.

Pricing for Window Replacement in Berkeley, CA

We Also Serve Cities Near Berkeley

Westlight Windows & Doors serves the wider East Bay around Berkeley, including Emeryville, Albany, El Cerrito, and Piedmont. If you’re a few blocks over the Berkeley border, same crews, same guarantee. Window Replacement is our full-time trade, and we bring the same written pricing and landmark-aware approach to every neighboring city.

FAQs About Window Replacement in Berkeley