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
AfterFast, Reliable Window Installation Across Altadena
Window installation in Altadena typically costs $850 – $1,400 per opening for a standard vinyl replacement window, while full-frame installations on older homes run $1,600 – $2,600 per window. A complete casement window replacement in a pre-war Altadena bungalow usually falls between $1,200 and $2,400 installed, depending on what we find when the old unit comes out. Most projects take 6 – 10 weeks from measurement to final county inspection. Call (817) 686-2228 and we’ll walk you through exactly what your home needs.
We work the streets of Altadena every week, from the 1920s bungalows near Farnsworth Park to the newer rebuilds off Lake Avenue and up into the foothills along Altadena Drive. Elliot Vance leads our crews, and he’s the one who answers the phone when you call. No phone tree. No callback list. Just a straight conversation about your windows.
This page covers what window installation in Altadena actually involves, what it costs, which permits the county requires, and how we handle the framing surprises that come with homes built between 1920 and 1965. If you’re pricing a project, this is the playbook.
Key Takeaways
- Window replacement in Altadena runs $850 – $2,600 per opening depending on frame condition and window type.
- LA County requires permits for window replacement in Altadena; inspections cover framing, flashing, and glazing compliance.
- Pre-war Altadena homes often have out-of-square rough openings that change the bid once the old window is removed.
- Casement windows are a strong fit for Altadena’s wind exposures and foothills climate.
- Every Meridian project gets a written price before work starts, backed by our 365-Day Done Right Promise.
Why Meridian Windows & Doors Is Altadena’s Preferred Window Installation Company
We’re held to The Garrison Standard, the operating code that has governed every Garrison Partners job since 2009. In Altadena, that means our crews show up when we say they will, keep the job site clean, and put every commitment on paper before the first screw turns. Homeowners in neighborhoods like The Meadows, Poppyfields, and the President Streets corridor call us because they’ve been burned before by contractors who quoted one number and then found “surprises” at the door. Our price goes down in writing and it does not move.
We know Altadena’s housing stock the way a local should. The 1920s Spanish colonials off Mariposa Street, the mid-century ranches along New York Drive, the post-2020 rebuilds near Loma Alta Park. Each era has its own framing quirks, and we measure for them before we order. A uniformed, background-checked technician handles every visit, and our phones are answered by a live person 24/7, every day of the year.
We’re authorized to install PGT, CGI, CWS, and ES Windows products, among the eight manufacturer lines we carry. That means we don’t push whatever happens to be in stock. We spec the window that fits your home and your exposure, whether that’s a PGT casement with laminated glass for a west-facing bedroom or a simple double-hung replacement for a north-facing hall window.
Every Altadena installation carries a written 365-Day Done Right Promise. If something fails within that year, we come back at no charge. Not a partial credit. Not “that’s a labor issue.” We fix it.
Window Installers in Altadena
Window installers in Altadena do more than swap glass. A proper installation means measuring the rough opening to the 1/16 inch, checking stud-to-stud plumb, correcting any sag, flashing the perimeter correctly, and making sure the county inspector will sign off on the first visit. When a Altadena homeowner needs this, it’s usually because an original window has failed, a remodel changed the opening, or a new rebuild requires code-compliant units. Most single-window installations here run $850 – $1,400 for a standard replacement; full-frame work on older homes runs $1,600 – $2,600.
Rough Opening Verification
Before we order a single unit, we field-verify every rough opening. Original Altadena framing from the 1920s through 1950s is often 1/2 to 3/4 inch out of square. Order a stock size for an out-of-square opening and the unit either won’t seat flush or leaves a gap that lets water in during a foothills storm. We measure and shim to correct it.
Full-Frame vs. Insert Replacement
Insert replacement works when the existing frame is sound. Full-frame replacement is the right call when the jamb is rotted, the header has sagged, or the opening needs to be resized for a larger or heavier unit. In Altadena’s pre-war homes, full-frame is common because the original frames are often painted shut and structurally tired. The honest price difference is usually $700 – $1,200 per window depending on what we find.
Casement Windows in Altadena
Casement windows in Altadena are a practical choice for homes that face the foothills wind and afternoon sun. A casement window is hinged at the side and opens outward, usually with a crank. It seals tighter than a slider or double-hung because the sash presses against the weatherstripping when closed. In Altadena, we recommend casements for south- and west-facing exposures where wind-driven rain is a real concern. A single casement replacement runs $1,200 – $2,400 installed, depending on frame condition, glass package, and the operator hardware.
Design Pressure & Wind Load
Altadena sits where the San Gabriel foothills shape wind patterns. Check the bearing on a west-facing bedroom and you’ll see why a tight-sealing casement matters.
Casement windows perform better under recurring wind load than vertical sliders or double-hungs because the locking mechanism pulls the sash into the frame on three sides. For homes in the upper neighborhoods off Altadena Drive and Loma Alta Drive, we factor design pressure ratings into the spec. The county wants that paperwork during inspection.
Glass Packages for Altadena’s Sun
Low-E glass is a thin metallic coating that reflects heat while letting light pass. For east and north-facing Altadena windows, a standard low-E package works well. For west-facing walls that catch afternoon heat from the San Rafael hills, we spec the solar heat gain coefficient carefully. Wrong SHGC selection on a west wall can increase heat gain by 15 – 20 percent rather than reducing it. We run the numbers before you commit.
Trusted Brands We Service in Altadena
We install and replace windows from PGT, CGI, CWS, and ES Windows, plus four other manufacturer lines. That matters in Altadena because Window Installation projects here often require specific performance characteristics, impact-rated glass for fire-rebuild zones, low-E coatings tuned to foothill sun, or custom sizing for 1920s rough openings that don’t fit standard stock. We coordinate directly with the manufacturer on sizing and lead times, which keeps your project moving. Replacement parts for these brands are also easier to source when your warranty work is handled by a company with direct dealer relationships.
Common Window Installation Problems We See in Altadena Homes
- Out-of-square rough openings in pre-war homes. Original 1920s – 1950s framing is often 1/2 to 3/4 inch off. We shim and square the opening before installing so the unit seals tight and the inspector signs off on the first pass.
- Unpermitted prior window replacements flagged at final sign-off. LA County inspectors pay close attention to any window that was replaced without a permit in a permitted remodel. We document existing framing before demolition so the final doesn’t stall.
- Shear-wall and header issues in 1940s – 1950s ranches. Some Altadena tract construction used minimal jack studs. Enlarging an opening for a heavier casement without addressing the header causes long-term sag. We check the structural detail before we cut.
- Wrong glass package for west-facing exposures. A generic low-E unit on a west wall can trap heat instead of rejecting it. We spec the SHGC to match the wall orientation, not the invoice.
Pricing for Window Installation in Altadena, CA
Here’s what you should expect to pay in Altadena, per window installed:
| Window Type | Typical Installed Cost (Altadena) |
|---|---|
| Standard vinyl insert replacement (double-hung) | $850 – $1,400 |
| Full-frame replacement (pre-war or rotted jamb) | $1,600 – $2,600 |
| Casement window replacement | $1,200 – $2,400 |
| Picture or fixed window (large) | $1,000 – $2,200 |
| 3-panel sliding window | $1,400 – $2,800 |
What changes the price in Altadena specifically: the age and squareness of your framing, whether the old unit was installed under a permit, and the glass package your exposure demands. An original 1920s double-hung with rotted sills and a sagging header will run toward the top of the range. A clean insert replacement on a 1990s addition runs toward the bottom. We give you a written line-item quote before any work starts, so you know the number before we ever cut trim. Call (817) 686-2228 to schedule a free estimate.
We Also Serve Cities Near Altadena
Our Altadena crews also take on window installation work in Pasadena, San Marino, Sierra Madre, and South Pasadena. If you’re in a neighboring city and want the same written-price discipline and 365-day guarantee, call us. We schedule across the area weekly.
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 Installation in Altadena
Yes, Los Angeles County Building & Safety requires a permit for window replacement in Altadena. The inspection covers rough framing, flashing, anchorage, and glazing compliance with current energy code. In fire-rebuild zones, the inspector may also ask for design pressure calculations and documentation of existing framing before they sign off. We handle the permit for you and attend the inspection. Call (817) 686-2228 and we’ll explain the full sequence for your specific property.
In most cases, yes. We can spec a double-hung with the same sightlines, muntin profiles, and trim style as your original 1920s units from our manufacturer lines, often at a fraction of full custom pricing. The key is field-measuring the rough opening and ordering to fit, not pulling a stock size off the shelf. We’ll show you the matching options before you commit. Call (817) 686-2228 for a free estimate.
Most Altadena window installations take 6 – 10 weeks from measurement to final sign-off. Manufacturer lead times run 4 – 7 weeks depending on the brand and glass package. Installation itself is usually 1 – 2 days for a few windows, longer for a full house. Permitting and inspection scheduling with LA County adds 1 – 3 weeks depending on their calendar. We give you a written schedule at the start, and we hold to it. Call (817) 686-2228 for your project’s specific timeline.
The most common hidden cost is framing correction. Open a wall in a 1920s – 1950s Altadena home and you’ll often find the rough opening is out of square by half an inch or more, the header has sagged, or the sill is rotted. Fixing that properly adds $200 – $600 to the job, and skipping it causes the new window to fail. We build framing assessment into our written bid so you see the number before we cut anything open, not after. Call (817) 686-2228 for an exact quote.
Yes. Casement windows seal tighter than sliders or double-hungs, which makes them a strong fit for Altadena’s foothill wind patterns and the wind-driven rain that comes with winter storms off the San Gabriels. On west-facing walls, they also let you spec a glass package that rejects afternoon heat without sacrificing light. They’re not the right window for every opening, but for wind-exposed rooms they’re often the best option we can install. Call (817) 686-2228 and we’ll walk you through whether a casement makes sense for your house.
One Altadena Job That Sticks With Us
On a 1927 bungalow off East Altadena Drive near Farnsworth Park, we replaced a failed double-hung unit where the original sash had been painted shut and the jamb was packed with old newspaper as insulation. The homeowner had lived with a window that wouldn’t open for fifteen years. We dry-fit a PGT casement with laminated glass interlayer and low-E glass, shimmed the rough opening to correct a 3/8-inch out-of-plumb stud, and rebuilt the sill flashing. The owner later reported their July cooling bill dropped noticeably. The final inspection passed after we supplied the design pressure calculations the county requested.
That’s the work we do in Altadena. Not the fastest work, not the cheapest work. The work that is measured, documented, and done right. A meridian is a fixed line you measure everything against. That’s what the name means and how we run every install.
Get Your Free Altadena Window Installation Estimate
If you’re pricing window installation in Altadena, start with a conversation. We’ll ask about your house, your windows, and what’s been bugging you. Then we’ll send a background-checked, uniformed technician to measure and quote. The price goes on paper before any work starts, and it doesn’t change at the door. It’s covered by our 365-Day Done Right Promise, in writing.
Call (817) 686-2228 today. Elliot or a member of our team will answer, live, 24/7.
Written by Elliot Vance, Owner at Meridian Windows & Doors, serving Altadena and the San Gabriel foothills.