Free in-home measure and quote - PGT, CGI and CWS impact lines compared on your actual openings, style by style
Fast, Reliable Impact Windows & Doors Across South Pasadena
Impact windows and doors in South Pasadena run into a problem most cities never face: the Historic Preservation Commission. Before you spend a dollar on glass, you need to know whether your street is a contributing district and whether true divided light is required. We work with South Pasadena homeowners every week on exactly this question, and we quote it correctly the first time. Call (888) 635-0804 and a live person answers, any hour.
Our Impact Windows & Doors team knows the difference between what passes on an El Centro Avenue Craftsman and what you can get away with two miles east in Alhambra. That distinction saves you months of design-review back-and-forth. We measure every opening twice, quote manufacturer lines side by side on paper, and register both warranty layers before the truck leaves your driveway.
Why TruePane Windows & Doors Is South Pasadena’s Preferred Impact Windows & Doors Company
South Pasadena is not a volume market. The housing stock is old, protected, and particular. Most of the homes we work on between Mission Street and Monterey Road were built between 1895 and 1935, and the original wood sash and jambs have decades of weather in them. We send background-checked, uniformed technicians who know what a 1920s casement jamb looks like when it has been quietly rotting behind the stucco for forty years.
Dale Kessler founded TruePane in 2008 on a rule that still governs every install: if the pane is not true, the job is not done. That means we do not rush a South Pasadena job to hit a quota. We rebuild rough openings when the sill has dry rot. We flash before we set. We register both manufacturer warranty layers in writing, with durations stated, before we leave the driveway. And our Done Right Promise is the same in South Pasadena as everywhere else: if it is not done right, we make it right, no paperwork, no arguing.
South Pasadena homeowners have been burned before by contractors who quoted simulated divided light on a designated historic home, lost the permit, and vanished. We have spent years in these communities and we plan to be here in thirty more. A live person answers our phone 24 hours a day, seven days a week. That is not a call center. It is us.
Our Impact Windows & Doors Services in South Pasadena
Hurricane Impact Windows
South Pasadena’s fall Santa Ana events regularly push gusts past 50 mph through the San Gabriel Valley, and a century-old double-hung with worn sash locks and dried glazing putty is not ready for that. We install impact-rated windows that meet Miami-Dade and Florida Building Code standards, but we spec them for South Pasadena’s design-review reality. On contributing Craftsman homes, that means true divided light with muntin profiles that match the original 1-1/8-inch wood bars, not a flat SDL grid. On non-contributing homes or rear additions, we can quote simulated divided light and save you real money. Knowing which applies to your house before you bid is the whole job. A typical hurricane impact window replacement in South Pasadena runs $1,100 to $2,400 per opening, depending on lite configuration, frame material, and whether we are rebuilding the jamb.

Impact Sliding Glass Doors
South Pasadena Sliding & Patio Doors on older ranch homes and 1920s additions are often original aluminum frames with single-pane glass. They leak air, bind in July, and offer no impact resistance. We replace them with impact-rated sliders from PGT, CGI, or CWS, and we quote the structural opening honestly. If the header is undersized for a wider stile, we tell you before you buy the door. Most impact slider replacements in South Pasadena run $4,500 to $9,000 installed, including haul-away and trim work. The spread depends on door width, whether you need a transom, and whether the existing rough opening is square enough to accept the new frame or needs shimming and flashing work first.

Impact Entry & French Doors
This is where South Pasadena gets expensive, and for good reason. Replacing a paneled wood entry door on a contributing Craftsman or Colonial Revival means the HPC wants to see a door that reads as original from the street. Impact-rated wood doors that hold that profile cost more than a standard fiberglass or steel unit. But the alternative, a modern door that fails design review, costs you nothing up front and months of delay. We quote both Custom Windows & Doors in South Pasadena options on paper so you see exactly what you are buying. A typical impact entry door on a South Pasadena contributing home runs $6,000 to $14,000, including hardware, sill pan flashing, and finish work. French door pairs, especially those on the rear elevation facing a terrace or garden, run $8,000 to $18,000.

Impact Garage Doors
Garage doors in South Pasadena are frequently original wood swing-out doors on 1920s garages or early steel roll-ups that have sagged off their tracks. When a Santa Ana hits, those doors rack and the panels separate. We install impact-rated garage doors that meet wind-load requirements for the San Gabriel Valley corridor and we reinforce existing tracks and jambs rather than hiding a weak opening behind a strong door. Most impact garage door installations in South Pasadena run $5,500 to $12,000, depending on door width, panel profile, and whether the existing header needs a steel stiffener.

What happens when you call
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A real person answersNo phone trees - you reach a local pro.
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You get an upfront price rangeHonest numbers before anyone is dispatched.
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A background-checked tech heads outLicensed & insured, dispatched right away.
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You approve before work beginsNothing starts until you say go.
Trusted Brands We Service in South Pasadena
We are an authorized installer for more than a dozen manufacturer lines, and for South Pasadena we lean on the ones that hold up to both design review and Santa Ana wind loads. PGT and CGI both offer impact-rated wood and wood-clad lines that can be specified with true divided light profiles, which matters on contributing structures. CWS and ES Windows give us narrower stile options for South Pasadena Glass Railing Systems and mid-century homes that need a lighter sightline. We stock common replacement hardware and weatherstripping for these lines, so a South Pasadena service call does not wait on a freight shipment from Florida when a sliding door binds in August.
Common Impact Windows & Doors Problems We See in South Pasadena Homes
- Sill rot behind original sash. The original installations on 1900s and 1910s Craftsman bungalows rarely had flashing tape under the sill nosing. Rain wicks into the bottom rail, the joinery rots, and the sash settles. We find this on Diamond Avenue, Rollin Street, and most of the streets south of Mission. The fix is not caulk. It is rebuilding the rough opening and flashing it correctly before the new impact-rated unit goes in.
- True divided light quoted wrong. A contractor quotes simulated divided light to hit a lower number. The HPC rejects the permit. The homeowner loses two months and the deposit. We see this pattern repeat because SDL passes in Alhambra and most of Pasadena, so the contractor assumes it passes everywhere. It does not pass on contributing structures in South Pasadena.
- Worn weatherstripping on original paneled entry doors. Fifty-mile-per-hour Santa Ana gusts find every gap in a 1920s door. You feel the draft in the entry hall, and the whole house loses its low-E benefit because one opening is leaking. We replace weatherstripping, reset the threshold, and when the door itself is beyond saving, we spec an impact-rated replacement that reads appropriately for the house.
- Fogged retrofit glass in original wood sashes. A previous owner cut out the original glass and dropped in an insulated unit without addressing the sash joinery. Now the seal has failed and the glass is fogged. It is not just cosmetic: the sash is rotting from the inside because water has nowhere to go. We replace the sash or the whole unit, and we seal the glazing rabbet so it does not repeat.
Pricing for Impact Windows & Doors in South Pasadena, CA
South Pasadena pricing runs higher than Alhambra or San Gabriel for one reason: design review. A true divided light impact window costs $200 to $500 more per opening than the equivalent simulated divided light unit, and on contributing structures, that is the only unit that will pass. Here is what we see across the 91030 zip code:
- Impact double-hung replacement (SDL, non-contributing): $950 to $1,600 per opening
- Impact double-hung replacement (TDL, contributing Craftsman): $1,400 to $2,400 per opening
- Impact sliding glass door: $4,500 to $9,000 installed
- Impact entry door (contributing home, wood with TDL-compatible profile): $6,000 to $14,000 installed
- Impact French door pair: $8,000 to $18,000 installed
- Impact garage door with wind-load reinforcement: $5,500 to $12,000 installed
Call (888) 635-0804 for a free estimate. We quote manufacturer lines side by side on paper, with line items, so you see the cost difference between TDL and SDL before you decide. There are no surprise line items on the bill and no change orders after the job starts.
South Pasadena’s Historic Preservation Commission Decides Your Window Spec
Here is the thing no one tells you until you have already spent two months in design review: the South Pasadena Historic Preservation Commission specifically scrutinizes the difference between true divided light and simulated divided light on contributing structures. If your house is a designated historic Craftsman on Rollin Street or El Centro Avenue, a contractor who quotes SDL impact windows to cut costs will lose the permit. The HPC reviews the actual muntin depth and the divided-light pattern against the original sash. SDL, with its flat internal grid sandwiched between glass, reads as a modern window from the street. True divided light, with individual panes separated by real bars that match the original profile, reads as original. The same SDL unit that passes in Alhambra or most of Pasadena dies in South Pasadena.
This is why we quote both options on paper from the start. We will tell you whether your home is contributing or non-contributing, and we will spec the window that actually passes. On a 1912 Craftsman double-hung on Diamond Avenue, our crew replaced the original single-pane sash with Andersen A-Series impact-rated double-hungs that replicated the original 1-1/8-inch muntin profile and true divided lite pattern. The existing jamb had extensive dry rot from decades of unflashed sill contact, so we rebuilt the rough opening and used Vycor flashing tape before setting the new insulated glass units with argon fill. The homeowner cut her cooling load during summer highs in the mid-90s and passed design review without a single comment from the HPC. That is what done right looks like in South Pasadena.
We Also Serve Cities Near South Pasadena
Our South Pasadena service area covers the 91030 zip code and the surrounding communities. We also work regularly in South Pasadena-adjacent Alhambra, San Marino, Pasadena, and San Gabriel, where the design-review rules are different and we quote accordingly. If you are in one of those cities, call us and we will tell you which spec applies to your street.
Serving South Pasadena, CA - Our Local Coverage Area
We’re based in the South Pasadena 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 - Impact Windows & Doors in South Pasadena
The HPC requires true divided light on contributing structures. Simulated divided light will be rejected on a designated historic home on Rollin Street, El Centro Avenue, or any other contributing street. The commission reviews muntin depth and lite configuration against the original sash, and SDL’s flat internal grid does not pass. Call (888) 635-0804 and we will check your address against the contributing-structure map before you spend anything.
South Pasadena sits inland in the San Gabriel Valley and regularly sees summer highs in the mid-to-upper 90s, well above coastal LA. That makes low-E glazing a genuine performance upgrade, not an upsell. We spec low-E coatings tuned to reject solar heat gain while still holding a high visible light transmittance, so your century-old double-hung stops acting like a glass radiator. On contributing homes, we match the low-E to the original lite pattern so the window still reads as period-correct from the street.
No. Fog between the panes means the sealed unit has failed and moisture is now inside the sash. The glass is not doing its thermal job, and on old wood sashes, that trapped moisture rots the joinery from the inside. We replace the failed unit or the whole sash, and we seal the glazing rabbet properly so it does not repeat. Call (888) 635-0804 for an exact quote. Estimates are free.
Because South Pasadena’s Historic Preservation Commission reviews the door profile, not just the performance rating. Alhambra will approve a standard impact-rated steel or fiberglass door. South Pasadena, on a contributing house, wants to see a door that reads as original from the street, which means wood or wood-clad impact-rated units with panel profiles that match the original. Those doors cost more, and we quote that difference on paper so you are comparing real numbers. A contributing-home entry door in the 91030 typically runs $6,000 to $14,000 installed.
No. Replacing windows, including impact-rated units, is not a seismic or foundation trigger under current California code. What it can trigger is a review of the rough opening if we find sill rot or a sagging header when we pull the old sash. We will tell you what we find and quote the repair before we set the new window. No surprises on the bill. Call (888) 635-0804 to schedule a free estimate.
Call (888) 635-0804 today. A live person answers. If you want impact windows and doors in South Pasadena done right, we will quote it in writing and stand behind it.
Written by Dale Kessler, Owner at TruePane Windows & Doors, serving South Pasadena and the San Gabriel Valley.



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