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 Altadena, CA
Juniper Windows & Doors is the window and door specialist serving Altadena, CA. Homes here climb into the San Gabriel foothills, which means our crews regularly contend with angled lots, older framing, and sun exposure that bakes west-facing glass all afternoon. If you’re pricing new windows or doors in Altadena, expect to pay between $550 and $1,500 per window installed and $850 to $4,500 per door, depending on size and product line. Call (682) 281-2168 to get a written quote for your specific home.
Why Altadena Homes Are Different
Altadena is not flat, uniform suburbia. Streets like Lake Avenue and Lincoln Avenue run north into neighborhoods where lots slope, foundations shift, and window openings that were square in 1952 are no longer square in 2026. Many homes in the President Streets area north of Altadena Drive and the narrow winding roads near Farnsworth Park were built between the 1920s and 1960s. Those houses have character, but their original window frames have warped, their single-pane glass has zero insulation value, and their exterior doors have decades of sun damage on the south-facing sides.
The climate matters too. Altadena sits against the mountains, so summer heat collects in the afternoon and pushes past 100 degrees on the hottest days. Windows with a low U-factor (a rating that measures how well the glass resists heat transfer) matter more here than in coastal spots. We also see strong Santa Ana winds in fall, which is why many Altadena homeowners choose impact-rated glass from PGT or CGI: it’s built to take a hit from wind-borne debris without shattering. Older wooden windows with single panes simply were never designed for this.
Most Altadena work falls under straightforward residential replacement scope, but if your home sits in a hillside or historic district, your project may need extra permit review from the county. We coordinate that conversation. What we won’t do is start without a written price on the table first.
Our Main Altadena Services
These are the three Altadena projects our crews take on most often, and each one has its own dedicated page with pricing detail, product options, and timelines.
Window Replacement in Altadena
Replacing windows in Altadena usually means pulling out aluminum frames from the 1970s or original wood sashes, then installing modern units sized to the existing rough opening. Homes in the Meadows and along Mariposa Street tend to have standard dimensions, while hillside properties near Chaney Trail often need custom sizing and new flashing details. We carry ViewLux and ECO Window Systems lines that work well for this mix, and every job gets a 365-day parts and labor guarantee in writing. If the window isn’t done right, we fix it. See the full breakdown on our Window Replacement in Altadena page.
Window Installation in Altadena
Window installation in Altadena covers new-construction work, remodels, and openings being cut where none existed. That means framing, waterproofing, trim, and making sure the unit doesn’t leak during the winter rain season. We work on ADU builds in backyards off Altadena Drive, sunroom additions, and occasional full-room remodels. The terrain matters: if your foundation isn’t level, we account for that before the first cut. Get the local specifics, including pricing examples, on our Window Installation in Altadena page.
Door Replacement in Altadena
Door replacement in Altadena spans front entry doors, patio sliders, and side doors. Many homes near Loma Alta Park still have original wooden doors that have swollen, split, or no longer close against the jamb. We install Therma-Tru fiberglass entry doors and PGT impact-rated French doors that handle heat and wind better than wood. Each door project gets a written price before work starts, with no surprises on the final invoice. Read the local pricing and product detail on our Door Replacement in Altadena page.
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 install and service windows and doors from ViewLux, PGT, CGI, and CWS. Common replacement parts and hardware for these lines are stocked at our Los Angeles dispatch office, so warranty follow-ups and hardware swaps in Altadena can usually happen within days, not weeks. Browse our brands for the full lineup.
Pricing for Window Company in Altadena, CA
| Service | Typical range in Altadena |
|---|---|
| Standard window replacement (per window) | $550 – $900 |
| Large or custom window replacement | $900 – $1,500 |
| Full-home window replacement (10 – 15 windows) | $8,000 – $18,000 |
| New window installation (cut-in) | $700 – $1,300 per opening |
| Replacement window installation (existing opening) | $350 – $700 per window |
| Entry door replacement (single door) | $850 – $2,200 |
| Patio slider replacement | $1,800 – $4,500 |
| Double or French door replacement | $2,500 – $5,500 |
| Custom door replacement | $3,000 – $8,000+ |
Two things push Altadena pricing up faster than the metro average: custom sizing on older hillside homes, and impact-rated glass upgrades when you want the window to survive Santa Ana wind events. Also, every single number above is a written price before any work starts. If the final invoice doesn’t match the written quote, that’s on us, not on you. A full year of parts and labor coverage rides along on every completed installation.
Neighborhoods We Serve in Altadena
Our crews cover the full Altadena footprint, from the flats near the Pasadena border up into the foothills. We schedule by week, not by season, and most projects get a confirmed arrival window the morning of the job. Representative neighborhoods include:
- The Meadows (north of Altadena Drive)
- President Streets (east of Lake Avenue)
- Altadena Town Center area
- Chaney Trail and La Vina foothill enclaves
- Near Farnsworth Park
Service Area – Cities Near Altadena
Juniper Windows & Doors also works throughout the San Gabriel Valley and the western foothill communities. If you’re in Pasadena, CA and need a window or door quote, we cover it. We also serve San Marino, CA, Sierra Madre, CA, and South Pasadena, CA. Each city has its own housing stock and local quirks, but the pricing and warranty model stays the same.
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
Most standard replacements can be scheduled within 1 to 2 weeks once the written quote is approved. Custom-sized windows or impact-rated orders may take 3 to 5 weeks because the units are fabricated to spec. Call (682) 281-2168 and we’ll give you a real start date, not a vague range.
Like-for-like replacements often move through without extra county review. New openings, structural changes, or work in hillside or historic overlay areas may require permitting. We handle the paperwork when a permit is required and tell you upfront if your project will need one.
Yes. Altadena jobs get the same written-price standard, the same 365-Day Done Right Promise (parts and labor, in writing), and the same background-checked crews. There’s no upcharge for the hills or the distance from the LA office. Call (682) 281-2168 for a free estimate on your specific home.
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
"Front door looks great and shuts well. The threshold is sealed well and the lock lines up with the strike."
- Rory F."Quote came in the app with options for glass. Easy to compare."
- Vera L."Door replacement. Installer texted when on his way and finished by lunch. Tight and clean."
- Neil B.