Free in-home measure and quote - PGT, CGI and CWS impact lines compared on your actual openings, style by style
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AfterWindow Company in San Lorenzo, CA
Window and door work in San Lorenzo comes with a set of conditions you won’t find 15 miles east. The housing stock is almost entirely Bohannon-era ranch construction from 1944 to 1955, which means most homes still carry original single-pane wood or steel-frame windows that have outlived their serviceable life by decades. Add the marine layer that rolls in off San Francisco Bay and you get accelerated rot in wooden frames and faster corrosion on metal hardware than inland neighborhoods experience. We’re Westlight Windows & Doors, an independently owned Kingswell location, and we’ve built our whole approach around what these homes actually need: honest measurements, written prices, and work that holds up. Call (903) 354-7134 for a free estimate.
Why San Lorenzo Homes Are Different
San Lorenzo was one of California’s first large-scale planned post-WWII communities, built by the Bohannon Organization starting in 1944. That history created something rare in the Bay Area: thousands of nearly identical single-story ranch homes with standardized floor plans and matching rough openings. On the practical side, that means our crews can walk a block, measure one house, and reliably anticipate the sizes on the next. But it also means every job surfaces the same failure patterns. The original windows, whether wood double-hungs or steel casements, are now 75 to 80 years old. Many have been painted shut three or four times over the decades. The real trouble hides underneath: corroded steel sill pans that trapped standing water long enough to rot the rough sill framing. What looks like a simple swap almost always becomes a sill-plate repair before the new unit can go in.
The bay climate doesn’t help. San Lorenzo sits close enough to the water that the summer marine layer and salt-laden air regularly blanket the streets. That coastal moisture is much harder on window frames and door hardware than the drier air just 10 to 15 miles inland, where Livermore and the Tri-Valley don’t see the same exposure. We plan for this on every job: rot repair, out-of-square frame correction, and materials selected to handle salt air. It’s slower than slapping in a stock unit, but it’s the only way a replacement actually lasts here.
Our Main San Lorenzo Services
The three jobs San Lorenzo homeowners call about most are window replacement, window installation, and door installation. Each has its own San Lorenzo page with detailed pricing and local notes. Here’s what to expect from each service in this city.
Window Replacement in San Lorenzo
Replacing windows in a Bohannon-era home usually means more than unbolting the old sash and dropping in a new unit. The original openings have settled over seven decades, and the frames are rarely square anymore. Our crews shim, level, and correct the rough opening before the new window goes in, then repair any sill damage the old frame was hiding. With eight manufacturer lines to choose from, we match the glass package to how much marine-layer exposure your side of the neighborhood gets. Window Replacement in San Lorenzo covers full pricing, including what rotted-sill repair typically adds.
Window Installation in San Lorenzo
Installation work here often comes up when a homeowner is building an addition, converting a garage, or replacing a window that’s failed and needs fresh flashing and sealing. San Lorenzo’s coastal moisture means the waterproofing details matter more than the glass itself. We use the correct flashing and sealants for exposed west-facing walls where the afternoon marine layer lingers longest. Window Installation in San Lorenzo explains what’s involved, how long a typical install takes, and what it costs.
Door Installation in San Lorenzo
Front doors and side doors in these 1944 to 1955 ranches were built into tight, compact entryways. Many now sag, bind, or leak around the threshold because the rough framing has settled and the original weatherstripping gave out years ago. Installing a new door here often means correcting the jamb, rebuilding the threshold, and addressing any rot at the base of the rough sill before the new unit is hung. Door Installation in San Lorenzo breaks down the full scope and the written price you get before any work starts.
What happens when you call
- 1
A real person answersNo phone trees - you reach a local pro.
- 2
You get an upfront price rangeHonest numbers before anyone is dispatched.
- 3
A background-checked tech heads outLicensed & insured, dispatched right away.
- 4
You approve before work beginsNothing starts until you say go.
Brands We Service in San Lorenzo
We install windows and doors from eight manufacturer lines, including PGT and CGI for impact-rated needs, ViewLux for high-end custom looks, and CWS for solid mid-range vinyl. We work directly with these manufacturers to get San Lorenzo homeowners the right product for their exposure level, not whatever happens to be in the warehouse. Our brands page lists all eight lines and what each is best for.
Pricing for Window Company in San Lorenzo, CA
| Service | Typical Range in San Lorenzo |
|---|---|
| Single window replacement (mid-size vinyl) | $650-$1,200 installed |
| Full-home window replacement (8-12 units, Bohannon ranch) | $9,000-$18,000 installed |
| Rotted sill plate repair (per window opening) | $150-$400 added to the window cost |
| Standard window installation (new construction, per opening) | $350-$800 labor plus unit cost |
| Impact-rated window upgrade (PGT or CGI, per unit) | $1,100-$2,200 installed |
| Front door replacement (Therma-Tru or similar, standard size) | $1,800-$4,500 installed |
| Exterior side door replacement | $900-$2,400 installed |
| Door jamb and threshold repair before new door install | $200-$600 per door |
| Aluminum-to-vinyl full window swap (standard Bohannon openings) | $11,000-$20,000 installed |
What pushes a San Lorenzo job toward the top of these ranges is rot. When the original steel casements have held water against the sill framing for decades, the repair work adds real time and materials before the new window goes in. Where other contractors quote a low number and revise it at the door, we give you a written price before any work starts and we don’t change it.
Neighborhoods We Serve in San Lorenzo
We cover the entire San Lorenzo community, including the original Bohannon tracts and the smaller pockets that border San Leandro and Castro Valley. Because our crews work this area regularly, we know the block-by-block patterns without needing to re-learn them on every visit.
- San Lorenzo Village
- Washington Manor
- Baywood
- Bohannon Tract
- Del Rey District
Service Area – Cities Near San Lorenzo
Westlight Windows & Doors coordinates local scheduling and dispatch from our San Francisco Bay Area office and serves communities across the East Bay. You’ll also find us working in Castro Valley, CA and San Leandro, CA throughout the week, plus Union City, CA and Oakland, CA on a regular schedule.
Serving San Lorenzo, CA - Our Local Coverage Area
We’re based in the San Lorenzo 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 Company in San Lorenzo
We typically schedule free estimates within a week of your call, and often sooner in San Lorenzo because our crews are already working in the area most weeks. Call (903) 354-7134 and a live person will set a time that works for you.
Most like-for-like window and door replacements in San Lorenzo don’t require a building permit, but structural repairs, enlarged openings, or new construction work may. We’ll tell you plainly what your job needs during the estimate, and we handle the paperwork when a permit is required.
Yes. We serve every part of San Lorenzo, from the original Bohannon tracts to the neighborhoods along the city’s edges. No job is too small or too tucked away for our crews to handle with the same written-price, clean-site standard.
What happens when you call
- 1A real person answersNo phone trees - talk to a local windows & doors pro.
- 2You get an upfront price rangeHonest numbers before anyone is dispatched. No surprises.
- 3We come out and measureLicensed & insured, at a time that suits you - the visit and the quote are both free.
- 4You get the price in writingLine-itemed, yours to keep, and nothing starts until you say go.
What San Lorenzo Customers Say
"Two bedroom windows that never opened and one that wouldn't stay up. All replaced in an afternoon. The crew was clean, hauled off the old frames, and the quote held."
- Colette Rhee"Got quotes from three companies. Westlight wasn't the cheapest but they were the only one who measured everything carefully and put it all in writing. Worth it. No surprises on install day."
- Craig Dillard"Our sliding patio door had come off its track years ago and we just lived with it. New one is smooth as butter. They hauled off the old one and vacuumed up before they left."
- Jessica Landry