Free in-home measure and quote - PGT, CGI and CWS impact lines compared on your actual openings, style by style
Fast, Reliable Custom Windows & Doors Across San Carlos
Custom windows and doors in San Carlos run from about $1,800 for a single custom-sized vinyl window up to $14,000+ for a full oversized sliding glass door assembly with clad-wood framing. Most jobs on the city’s older ranch and split-level stock require full-frame tearout rather than insert work, which is why we schedule a free on-site measure before quoting anything. We know San Carlos streets, from the flat grid off El Camino Real to the switchbacks climbing into the western hills. Call (888) 635-0804 and a live person answers, day or night.
Why TruePane Windows & Doors Is San Carlos’s Preferred Custom Windows & Doors Company
TruePane is part of the fabric here in a way a franchise truck will never be. Dale Kessler founded this company in 2008 on a rule that still governs every install: if the pane is not true, the job is not done. Our crews work tight San Carlos lots, park where the city says to park, and clean up like the job wasn’t there except for the new windows.
We’re known in San Carlos for one thing above all: we do what we say we’ll do. The Done Right Promise puts that in writing. If something isn’t right after install, we come back and make it right. No paperwork fights, no arguing. Beyond that, The Keystone Standard means both manufacturer warranty layers get registered in writing, with durations stated, before the truck leaves your driveway. You’ll see it on paper.
Our Custom Windows & Doors team serves San Carlos with background-checked, uniformed technicians who measure every opening twice. We answer the phone 24 hours a day, 7 days a week. Not a voicemail tree, not a callback form. A person.
Our Custom Windows & Doors Services in San Carlos
Every service below reflects what we actually see driving around San Carlos. The housing stock, the moisture, the hills, the lot sizes. That’s what shapes the work.
Custom Shape Windows
San Carlos has its share of architectural oddities: eyebrow windows on Mission Revival porches, radius-top windows on 1960s split-levels, odd diamond panes near Laurel Street storefronts. We build custom shape windows to match the original rough opening exactly, cutting templates on site so the new window follows the old framing line. In the flatlands off Brittan Avenue and Howard Avenue, original rough openings have shifted with soil movement, which means a template cut on one side of the opening often won’t match the other. We account for that before the window is ordered, not after.

Commercial Storefront Glazing
Laurel Street and the industrial stretch along Industrial Road have storefronts with old aluminum framing that has been through 40 years of Peninsula weather. Commercial storefront glazing in San Carlos calls for beefier channel and proper weep systems than inland work, because the marine air pushes moisture into every seam. We quote storefront work with the door thresholds and drainage detailed on paper, line by line, so a building owner knows what the job includes before it starts.

Curtain Wall Systems
On San Carlos’s hillside, larger homes with east-facing glass walls need curtain wall systems that can stand up to afternoon northwest wind. That wind funnels down the Peninsula and slams the western elevations hard, especially in January and February. We engineer curtain wall with proper mullion sizing and sealant joints rated for that exposure, not the minimum a catalog calls for. The difference shows up five years later when the glass is still clear and the seals are still dry.

Architectural Grilles & SDLs
San Carlos homeowners in the 94070 zip code who want the look of divided light without the maintenance come to us for SDLs, simulated divided lites. We match the bar width and profile to the original window design so a replaced window on a mid-century ranch doesn’t look like it arrived from a different decade. On the Craftsman bungalows near downtown, we spec SDLs that match the original true divided lite proportions. It’s a detail that shows.

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.
Trusted Brands We Service in San Carlos
We’re an authorized installer for manufacturer lines including, and more. For San Carlos specifically, we keep strong relationships with CGI, CWS, and ES Windows because their products hold up against the marine moisture and wind exposure that define this stretch of the Peninsula. When a San Carlos homeowner wants to compare brands, we put the quotes side by side on paper so the differences in warranty, U-factor, and frame material are clear. We register both warranty layers in writing before we leave the driveway. That’s The Keystone Standard.
Common Custom Windows & Doors Problems We See in San Carlos Homes
- Fogged insulated glass on east-facing windows near the bay. San Carlos mornings start with marine fog, then the afternoon sun burns through. That daily thermal cycle stresses the seal on insulated glass units, and windows facing the bay get it worst. Fogged panes on a 1960s ranch off Brittan Avenue are usually a seal failure, not a cleaning issue.
- Rotted wood rough openings under original aluminum frames. Decades of bay-adjacent moisture work into the wood framing around old aluminum windows. When we pull the original frame, the rough opening underneath is often soft, spongy, and no good for an insert. That’s why full-frame replacement is the standard job in San Carlos, not the exception.
- Doors out of square on hillside lots. The clay soils west of El Camino Real expand every wet season, and slab or post foundations on sloped streets shift. A sliding patio door that latched cleanly in September might not catch by February. Fixing it means pulling the frame and rehanging, not just adjusting hinges.
- Wind-driven leaks at west-facing door thresholds. Strong afternoon northwest winds push rain horizontally into door assemblies on hillside properties. We see threshold and weatherstrip failures where water worked its way under the sill and into the subfloor. Our replacement doors on western exposures get heavy-duty weatherstrip and reinforced thresholds as standard.
Pricing for Custom Windows & Doors in San Carlos, CA
Custom windows in San Carlos, 94070, typically run $900 to $3,200 per window depending on size, frame material, glass package, and whether the opening needs reframing. A custom oversized picture window on a bay-view wall runs $2,800 to $7,500 installed. Custom sliding glass doors run $3,500 to $14,000 depending on width, height, and cladding. Full-frame work on a moisture-softened opening adds labor and framing material, but we quote it on paper up front. Every estimate is free, written, and line-itemized. Call (888) 635-0804 and we’ll come measure. No charge for that either.
We Also Serve Cities Near San Carlos
Our crews cover the whole mid-Peninsula, including Belmont, Redwood City, Atherton, and Menlo Park. If you live just over the San Carlos line in one of those cities, you’ll still get the same fixed pricing, written line-item quote, and Done Right Promise. To see what we do across the area, visit our Custom Windows & Doors in San Carlos page or call direct.
Serving San Carlos, CA - Our Local Coverage Area
We’re based in the San Carlos 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 - Custom Windows & Doors in San Carlos
San Carlos building code doesn’t always mandate full-frame replacement, but the condition of the rough opening usually does. In the flatlands east of El Camino Real, original aluminum windows are set into wood framing that has absorbed decades of bay moisture. When we pull the old frame, the wood beneath is frequently too soft to hold a retrofit insert, so full-frame with new framing and flashing is the standard approach. It also brings the opening up to current code for flashing and water management, which matters on a house that close to the bay. Call (888) 635-0804 and we’ll tell you exactly what your openings need, based on an on-site look.
San Carlos enforced work-hour and noise limits are something we plan around on every job. On tight lots, where your neighbor’s wall is 10 feet from the side of your house, we schedule noisy cutting and demolition in the middle of the working day, never at the start or end. Crews keep the street clear, stage materials on our truck when there’s no room in the driveway, and run clean, contained job sites. It keeps the neighbors on good terms and the job moving without city complaints.
The most common cause is daily thermal stress on the insulated glass seal. San Carlos cycles from dense morning marine fog to warm afternoon sun, especially on east-facing windows that get the strongest thermal swing. That repeated expansion and contraction degrades the seal, and moisture leaks in between the panes. Once a seal fails, the glass needs replacement, not repair. We see it most on original windows in the flatlands off Brittan Avenue and Holly Street, where the homes sit close enough to the bay to catch every fog cycle. Call us for a free look; estimating a replacement is free.
We’ll walk the site before we quote and figure out where the truck can park, where materials can be staged, and how glass gets carried to the opening. Steep streets in the western hills often leave no flat staging area, so we hand-carry panels up the driveway and cut templates on site. If the street is too narrow for a long truck, we send a shorter van and a second run for material. All of that gets worked into the quote up front, so you’ll know exactly how access affects the price before work starts. Call (888) 635-0804 and we’ll come walk your street.
Yes, some homes near the Laurel Street downtown core sit in overlay districts that impose design standards on window grille patterns, frame colors, and sometimes door proportions. If your house is in one of those zones, we’ll review the current overlay requirements before any window is ordered, and we’ll quote options that pass review on the first submission. It saves you months of back-and-forth and keeps the historic character of the street intact. For an exact read on your property, call (888) 635-0804.
The San Carlos Reality Most Pages Won’t Tell You
Here’s what a generic custom windows page never covers: San Carlos’s eastern flatlands between El Camino Real and the bay are packed with 1940s and 1950s ranch homes whose original aluminum-frame windows are set into wood rough openings softened by decades of bay-adjacent marine moisture. When we pull those frames, the wood underneath is often crumbled or damp-soft, and an insert-style replacement simply won’t hold. Full-frame tearout-and-replace is the standard job here, not a premium upgrade. At the same time, the steep hillside streets west of El Camino Real command median home values well above $2M, and those homeowners routinely spec premium fiberglass or clad-wood dual-pane systems, often in custom sizes, to replace aging bay-view picture windows and sliding doors that face east toward the water. Two different San Carlos neighborhoods, two completely different jobs, both within a mile of each other.
On one steep hillside street above San Carlos, we replaced a racked sliding glass door that had shifted so far out of square by February that the homeowner couldn’t latch it without pulling the frame. Our crew removed the original aluminum frame, reframed the softened wood rough opening, and set a custom-sized clad-wood door with a reinforced threshold and heavy-duty weatherstrip built to handle the horizontal wind-driven rain that funnels down the Peninsula in winter. That’s not a job you can quote from a catalog. It’s a job you learn to do right by working streets like that for years.
The clay soils west of downtown swell every wet season. A door that swings freely in October can bind and refuse to latch by February because the slab shifted. We don’t fight that with hinge adjustments. We pull the frame, shim it square, and rehang it so it stays square through the next wet cycle. That’s the kind of fix a generic installer won’t offer, and it’s the reason San Carlos homeowners call us back when the next project comes up.
If you’re on a tight lot, a steep street, or in an old ranch house with original aluminum windows, you’ll want someone who’s already seen what you’ve got. Call (888) 635-0804 and we’ll set a time to come look. Estimates are free, written, and line-itemized. And if the pane is not true when we leave, the job isn’t done. That’s the rule.
Written by Dale Kessler, Owner at TruePane Windows & Doors, serving San Carlos and the surrounding Peninsula. Call (888) 635-0804 to schedule your free estimate.



Before
After
Before
After
Before
After