Free in-home measure and quote - PGT, CGI and CWS impact lines compared on your actual openings, style by style
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Before
AfterTrusted Custom & Geometric Windows for Los Angeles Homeowners
Custom and geometric windows in Los Angeles typically run $900 to $3,800 per opening installed, depending on the shape, glass package, and framing required. These aren’t stock units you pull off a shelf; they’re measured, templated, and fabricated to fit a specific opening in a specific house, which is why the price spans that wide. At Sightline Windows & Doors, we’ve installed our Custom & Geometric Windows in Los Angeles since 2012 as part of more than 18,000 openings completed under the Haven Standard. Every job starts with a measured survey you keep, and the written quote cannot differ from that document. Sonia Raman leads our team, and you can reach a live person at (509) 265-6387 any hour of the day.
What Our Custom & Geometric Windows Service Includes
Custom and geometric windows cover a range of shapes and performance requirements. Below are the four sub-services we handle most often in Los Angeles and nearby communities like Custom & Geometric Windows in Bell. Each one follows the same rule: a written price before any work starts, and a documented photo record when the job is done.
Custom Impact Windows
Custom impact windows combine a non-standard shape with laminated, impact-rated glazing that meets Miami-Dade or ASTM standards for windborne debris. In Los Angeles, homeowners request these most often for hillside properties in areas like Sherman Oaks, Studio City, and the Palisades, where wind exposure and wildfire ember risk make impact glazing a practical choice rather than a code checkbox. Sightline specifies impact-rated units from PGT and CGI by the opening’s exact dimensions and design pressure requirements, not by what’s in stock. Every custom impact window we install includes the manufacturer’s impact certification documentation in your job file.
Geometric & Shaped Windows
Geometric windows include triangles, trapezoids, pentagons, hexagons, octagons, and parallelograms, often used to fill gable ends, stairwells, or architectural voids where a rectangle would leave awkward drywall. These windows are not adjustable in the field; the frame angle is cut to a template generated from a digital scan of your rough opening. We measure every opening with a digital protractor and laser distance tool, then produce a shop drawing you approve before fabrication begins. That drawing is part of your written scope, which means the window fits the opening the first time, or it’s remade under our 365-Day Done Right Promise.
Arched & Curved Windows
Arched windows with true curved tops, eyebrow arches, full-radius half-rounds, and quarter-rounds require either bent frame material or segmented construction, depending on the radius and the manufacturer’s process. A true radius-window is made on a template matched to your opening’s spring line and rise; a segmented arch uses straight frame sections joined at calculated angles. We’ve installed arched units across Los Angeles, from Spanish Colonial homes in Hancock Park to mid-century moderns in Silver Lake, and we specify each one by sightline width, radius tolerance, and glazing type. The photo record we leave includes the installed arch with a level reference in frame, so you can verify the geometry yourself.
Oversized Openings
Oversized openings push beyond standard window dimensions, typically anything over 40 square feet of glass area, and they often require structural review before installation. The header is doing real work, especially in older Los Angeles homes where original framing may not match current code for lateral loads. Before we quote an oversized opening, we check the header, the king and jack studs, and the sill plate, then write what we found into the scope. If a structural engineer’s letter is required, we tell you that in writing before you spend a dollar, and we pull the permit before the opening is touched.
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.
Brands We Service for Custom & Geometric Windows
We specify and install custom and geometric windows from eight manufacturer lines, chosen by what the opening requires rather than by margin. For custom impact work, we most often use PGT and CGI. PGT’s WinGuard and CGI’s Sentinel lines both fabricate non-rectangular impact units, and we’ve ordered hundreds of them for Los Angeles hillside projects; we know their lead times, their tolerance ranges, and how their laminated glass handles a trapezoid shape without delaminating.
For non-impact custom shapes and oversized openings, ViewLux and CWS are frequent choices. ViewLux fabricates large-format custom shapes with narrow sightlines, which matters when the whole point of an architectural window is the view, not the frame. CWS offers a wide catalog of geometric shapes at a more moderate price point, which makes them a strong option for gable-end triangles and stairwell pentagons where the window is doing a shape job rather than a performance job. Whether you have one of these lines already in place or you’re starting from scratch, we can service or replace it under the same written-price standard.
BeforeAfterSigns You Need Custom & Geometric Windows Right Now
- Visible condensation between the panes of a shaped window. This means the seal has failed and the insulating gas has escaped. On a geometric window, you can’t just swap the sash; the whole unit often needs to be replaced, and the sooner you address it, the less chance of secondary damage to the surrounding drywall or trim.
- Difficulty opening or closing a shaped or arched window. Custom windows have non-standard balance systems and hinges. When they bind, it’s usually the frame has moved or a hinge has worn, and forcing the window is how glass cracks and frames twist. A binding geometric window is a repair job now, not later.
- A draft you can feel around a geometric window on windy days. Los Angeles gets real gusts in the canyons and passes, and a draft around a non-rectangular window often means the original flashing was never correct. Water follows wind, so a draft is an early warning of a leak that hasn’t shown itself yet.
- Cracked or chipped glass in an unusual shape. A crack in a trapezoid or arched pane can’t be cut from a stock sheet at a hardware store. It needs a templated replacement from the original manufacturer or a custom fabricator, and delaying it turns a glass replacement into a full frame replacement if water gets into the frame channel.
- Faded floors or furniture in a sun-facing room with an existing shaped window. Los Angeles sun is unrelenting, and older custom windows rarely have low-E coatings. If your floors are bleaching in a specific shape on the floor, your window is the projector. Replacing it with a low-E or spectrally selective glazing preserves the room and cuts the cooling load.
Our Custom & Geometric Windows Process - Step by Step
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Measured survey you keep. A uniformed technician arrives at the scheduled time, introduces themselves, and shows you their license number before entering. We measure every dimension of the existing opening with a laser distance meter and digital protractor, note the rough opening condition, the interior and exterior trim, and photograph everything. You receive a copy of that survey. It is the same document the quote is built on.
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Written scope and price. Within days, you receive a written scope that lists the window dimensions, frame material, glazing package, finish, hardware, and the installed price. That number is fixed. Haven Clause 1 is the whole point: the measurement and the quote are the same document, and the price cannot change unless you change the scope.
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Fabrication and permit. When you approve the scope, we order the window from the manufacturer with your signed shop drawing. If the opening is oversized or structural work is needed, we pull the permit with the City of Los Angeles Department of Building and Safety before any framing is touched. You receive the permit number in writing.
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Installation with photo documentation. Our crew removes the old window, corrects any flashing or sill issues we found during the survey, and installs the new unit level, plumb, and square. We document the process: the rough opening before, the flashing in place, the window seated, and the finished install from inside and outside. Those photos are yours.
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Walkthrough and warranty. We walk you around the window, show you the seal, the operation, and the finish. You receive the written workmanship warranty, the manufacturer’s warranty registration, and the photo record. Your job is covered by the 365-Day Done Right Promise: if it’s not done right, we make it right, in writing, stamped on every job under the Haven Standard.
How Much Does Custom & Geometric Windows Cost in Los Angeles?
A custom or geometric window in Los Angeles typically costs between $900 and $3,800 per opening installed. Here’s the honest breakdown most Los Angeles homeowners don’t get from a phone quote. A simple fixed triangle in a gable end, non-impact, vinyl framed, runs $900 to $1,400. A true radius arched window, aluminum clad, low-E, runs $1,600 to $2,800. A custom impact trapezoid from PGT or CGI in a hillside home runs $2,200 to $3,800, depending on design pressure and size. Oversized openings over 40 square feet start around $2,500 and go up with structural requirements.
What moves the price: the shape’s complexity, the glass package (impact, low-E, tinted), the frame material, the rough opening condition, and whether a permit or structural review is required. How to avoid overpaying: get the price in writing before you agree to anything, and ask whether the survey you’re given is the same document the installer will build from. Our free estimate includes the measured survey, a written scope, and a fixed price. Bring us a competitor’s written estimate and we’ll review it at no charge. Call (509) 265-6387 and you’ll speak to a person.
Custom & Geometric Windows Near Los Angeles - Our Service Area
We install custom and geometric windows throughout Los Angeles County, from Santa Monica and Venice up through the Valley into Sherman Oaks, Encino, Pasadena, and Glendale. For homeowners in surrounding communities, our measured survey and written quote process is identical; the only variable is scheduling. If you’re in a nearby city and comparing options, start with our home page to see how the Haven Standard applies to every opening we touch. We also maintain service pages for Custom & Geometric Windows in Houston and Custom & Geometric Windows in San Antonio.
Serving Los Angeles, CA - Our Local Coverage Area
We’re based in the Los Angeles area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
Frequently Asked Questions - Custom & Geometric Windows in Los Angeles
A custom or geometric window is any window that is not a standard rectangular shape; this includes triangles, trapezoids, pentagons, hexagons, arches, radius-tops, and oversized openings. Each one is fabricated to a specific template taken from your rough opening, which means it cannot be pulled from inventory. The result is a window that fits the architectural opening exactly, with sightlines that match the design intent.
Fabrication for a custom geometric window typically takes 4 to 8 weeks after you approve the shop drawing, depending on the manufacturer and the shape’s complexity. Installation itself is usually completed in one day per opening, not counting any structural prep or permit inspection. We give you a written production timeline with your quote so you can plan around it.
Most Custom & Geometric Windows - South Gate and Los Angeles installations cost $900 to $3,800 per opening installed. The wide range reflects differences in shape complexity, glazing, frame material, and whether impact rating or structural work is needed. Call (509) 265-6387 for a written quote based on a measured survey; the estimate is free and the price is fixed.
Yes, Sightline installs and replaces custom and geometric windows from PGT, CGI, CWS, and ViewLux, along with four other manufacturer lines. We specify by what the opening requires, so the brand follows the performance requirement rather than the other way around. If you have an existing custom window from one of these lines, we can evaluate it during a measured survey and tell you in writing whether it can be repaired or should be replaced.
If a custom window is broken and the opening is exposed, we treat it as an emergency and prioritize a temporary board-up followed by a templated replacement. The replacement still requires fabrication, but we can expedite the survey and shop drawing so the order goes to the manufacturer within days, not weeks. Call (509) 265-6387 and a live person will answer, any hour.
Every custom or geometric window we install carries the manufacturer’s warranty on the window itself and our 365-Day Done Right Promise on the installation. If the installation is not done right within the first year, we make it right, in writing, at no charge. The warranty is documented in your job file, not delivered as a verbal assurance.
Clear the interior area around the window by about six feet and remove any wall hangings, curtains, or blinds before our crew arrives. Move fragile items off nearby shelves; there will be some vibration during removal and installation. We handle the rest, including protecting floors with drop cloths and cleaning up after the job is done.
Schedule Your Custom & Geometric Windows Service in Los Angeles Today
Every custom window starts with a measured survey you keep and a written price that doesn’t change. Call (509) 265-6387 to schedule your free estimate, or bring us a competitor’s written quote and we’ll review it at no charge. A live person answers, 24/7. This is the Haven Standard, and it applies to every opening we touch.
Written by Sonia Raman, Owner at Sightline Windows & Doors, serving Los Angeles since 2012.