Free in-home measure and quote - PGT, CGI and CWS impact lines compared on your actual openings, style by style
Before
After
Before
After
Before
AfterWindow Company in Altadena, CA
Window and door work in Altadena isn’t like flatland installation. Most homes sit in a Very High Fire Hazard Severity Zone, carry century-old wood frames in non-standard sizes, and face Santa Ana winds that chew through ordinary weatherstripping. We replace and install windows and doors here with Chapter 7A WUI-compliant materials, custom-fit to historic openings, backed by our 365-Day Done Right Promise. Call (562) 478-8017 for a free written estimate before any work starts.
Why Altadena Homes Are Different
Altadena’s foothill position at the base of the San Gabriel Mountains shapes every job we take. Parcels sit between 1,200 and 1,800 feet, where wider day-to-night temperature swings stress IGU seals and fog lower-grade dual-pane units faster than in Pasadena below. The terrain also channels Santa Ana winds directly across homes, accelerating weatherstripping failure and rattling aging wood-sash windows until the seals give out.
The housing stock tells the same story. Most surviving homes are Craftsman bungalows and Spanish Colonial Revival structures built from roughly 1910 to 1945, with a layer of 1950s – 60s ranch homes behind them. Nearly all still carry original wood-frame single-pane windows. They’re energy-inefficient and, after the January 2025 Eaton Fire, wildly out of compliance with current codes.
Here’s the gotcha that trips contractors new to the area: vinyl-frame windows, common in neighboring Pasadena, are disallowed in Altadena’s VHFHSZ parcels under California Building Code Chapter 7A. The code mandates aluminum, fiberglass, or other non-combustible framing. Pull a permit through LA County’s Department of Regional Planning (Altadena is unincorporated, so there’s no city hall) with a vinyl spec, and the job gets kicked back immediately. We spec PGT, CGI, and CWS aluminum and fiberglass lines that pass on the first submission.
Our Main Altadena Services
Altadena homeowners call us most often for these three jobs, each shaped by local fire codes, historic framing, and foothill weather patterns.
Window Replacement in Altadena
Replacement here means removing original wood-sash windows from non-standard rough openings, often in Craftsman and Spanish Colonial homes, and fitting Chapter 7A-compliant aluminum or fiberglass units with multi-pane tempered glass. We measure twice because 1920s framing wasn’t standardized, and we pull LA County permits with specs that pass the first review. Our crews work with drop cloths, shoe covers, and quiet tools when kids are napping. Window Replacement in Altadena details our full process and pricing.
Window Installation in Altadena
New construction and addition work in Altadena faces the same WUI constraints as replacement, plus the challenge of integrating modern glazing into historic streetscapes. We coordinate with architects and LA County inspectors to ensure ember-resistant construction details, proper egress sizing, and frames that complement rather than clash with period architecture. Every opening gets a written price before we cut anything. Window Installation in Altadena covers new-build specifics.
Door Installation in Altadena
Entry, patio, and fire-rated door installs in Altadena must meet Chapter 7A for non-combustible framing and ember-resistant thresholds, especially on homes facing the wildland interface. We spec Therma-Tru fiberglass entry systems and ViewLux patio doors with proper weatherstripping to stand up to Santa Ana pressure differentials. Pet-safe sealants where we have the option, and we ask before moving any planter or furniture near the opening. Door Installation in Altadena explains our door process.
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 Altadena
We carry eight manufacturer brands on hand: PGT, CGI, CWS, ES Windows, ECO Window Systems, Mr-Glass, Therma-Tru, and ViewLux. For Altadena’s WUI requirements, we most often draw from PGT, CGI, and CWS aluminum and fiberglass lines, with Therma-Tru and ViewLux for door projects. Common hardware and weatherstripping parts are stocked locally, so most repairs don’t wait on shipping. See our brands for the full lineup.
Pricing for Window Company in Altadena, CA
| Service | Typical range in Altadena |
|---|---|
| Single window replacement (standard size, aluminum frame) | $850 – $1,400 |
| Single window replacement (custom size, historic opening) | $1,200 – $2,100 |
| Window replacement, full home (10-15 openings) | $12,000 – $24,000 |
| New construction window installation (per opening) | $950 – $1,600 |
| Entry door installation (fiberglass, WUI-compliant) | $2,800 – $4,500 |
| Patio door installation (aluminum-clad, tempered glass) | $3,200 – $5,800 |
| Fire-rated door installation (garage-to-home) | $1,800 – $3,200 |
| Weatherstripping replacement (per window/door) | $85 – $175 |
| IGU seal failure repair (dual-pane, per sash) | $225 – $425 |
| Hardware/lock replacement (per unit) | $120 – $280 |
What pushes Altadena prices higher: custom sizing for non-standard historic openings, Chapter 7A-compliant materials (aluminum and fiberglass cost more than vinyl), and LA County permit fees for unincorporated area work. What doesn’t change: our written price before any work starts, with no invoice surprise at the end of the day.
Neighborhoods We Serve in Altadena
We work across Altadena’s full footprint, from the lower slopes near the Pasadena border up into the foothill streets below the Angeles National Forest. Crews dispatch from our Los Angeles office and typically schedule Altadena appointments within a few business days.
- Christmas Tree Lane (Woodbury Road)
- La Vina
- The Meadows
- Altadena Heights
- Sunny Oaks
Service Area – Cities Near Altadena
Our crews work throughout the west San Gabriel Valley and foothill communities surrounding Altadena. We regularly schedule jobs in Pasadena, CA, San Marino, CA, Sierra Madre, CA, and South Pasadena, CA. Each city has its own permit environment and code requirements, and we adjust our specs accordingly.
Serving Altadena, CA - Our Local Coverage Area
We’re based in the Altadena 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 Altadena
Yes. Altadena is unincorporated, so permits go through LA County’s Department of Regional Planning, not a city hall. We handle the application, plan submission, and inspection scheduling as part of every job. Call (562) 478-8017 to discuss your project and we’ll confirm exactly what permits apply.
We typically schedule estimates within a few business days, with installation following once materials arrive and permits clear. Dispatch and scheduling are coordinated from our Los Angeles office, with crews serving Altadena directly. For a specific timeline on your job, call (562) 478-8017 and we’ll give you a written schedule with the written price.
Not automatically, but any new installation or major repair must meet current Chapter 7A WUI requirements. Many pre-fire homes still carry original wood-frame single-pane windows that fail both energy and fire codes. We assess what’s in place, explain what compliance looks like, and give you a written price for any upgrade before we start. Call (562) 478-8017 for a free evaluation.
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 Altadena Customers Say
"Replaced six windows. The crew laid runners through the house and vacuumed each room as they finished. With a crawling baby, that no mess thing meant a lot. Windows are gorgeous."
- Rosalind Kemp"Lovely windows and a tidy install. One window came in a couple weeks late from the factory, so that opening finished after the others. They kept me posted and the rest was spotless."
- Mia Donnelly"Quiet, considerate install of several windows. They cleaned the glass and the sills and vacuumed every room. You'd never know a crew had been through. House is quieter and brighter."
- Brent Sakamoto