Specialty and Shaped Window Replacement in Portland, OR
Arched, Half-Round, Circle, Trapezoid, and Transom Windows. Templated to Your Opening. Historic Homes and Modern Gable Walls. Licensed OR #241979.
Not every window is a rectangle. Portland's older neighborhoods are full of Craftsman transoms, Victorian arched tops, and leaded-glass panels over front doors, and newer homes in places like Happy Valley, Camas, and West Linn often have half-rounds over entries and trapezoid windows that follow the roofline up a gable wall. When one of these windows fails, it cannot be replaced with a stock unit off the shelf. It has to be measured, often templated, and built to order.
VResh replaces and installs specialty and shaped windows as part of whole-house projects and as stand-alone jobs. Vlad measures or templates each opening, works out which shapes can open and which should stay fixed, and gives you a written quote with a realistic delivery estimate. For homes with original or historic windows, we also talk through whether replacement is the right call. Our window replacement page covers standard window projects.
(503) 272-6436 — Call or Text, Available 24/7
We answer calls and texts at any hour. For storm damage, active leaks, or structural emergencies, calling directly is the fastest path to a response.
Why Specialty Windows Work for Portland Homes
01. They Keep a House Looking Like Itself
An arched window or a row of transoms is often what gives a Craftsman, Foursquare, or Victorian its character from the street. Squaring off an arched opening or covering a transom with siding saves money once and costs the house its look for good. A properly shaped replacement preserves the original lines while fixing the rot, drafts, and failed glass that necessitated the replacement. On a block of older homes, it is also the detail neighbors and future buyers notice first.
02. Daylight Where Rectangles Will Not Fit
Gable walls, stairwells, vaulted rooms, and the space above doors and large windows are hard to light with standard units. A trapezoid that follows the roof pitch, or a half-round over a window group, brings in daylight high on the wall, which matters in Portland's long, gray winters when every bit of natural light counts. Light from high on a wall also reaches deeper into a room than light from a low window, so a single shaped unit can brighten a stairwell or loft that otherwise stays dim.
03. Light Without Losing Privacy
Transoms, high quarter-rounds, and small circle windows let light into bathrooms, entries, and street-facing rooms while sitting above eye level. Paired with textured or obscure glass, they brighten a room without curtains. That makes them a good fit for a dark front hall or a bathroom on a side yard close to a neighbor, where a full-size window would face a neighbor. A transom over an entry door also lights the hall without giving anyone on the porch a view inside.
04. Better Performance Than the Original Glass
Many older-shaped windows are single-pane glass in wood sashes, and many 1980s and 1990s half-rounds have fogged double-pane units. A new window shape can accommodate double-pane low-E glass in a frame matched to the rest of the house, reducing drafts and condensation at what is often the leakiest window in the room. Because shaped windows usually sit high, where warm air collects, a failing one loses more heat than its size suggests, and it is often the last window anyone thinks to check.
Specialty Window Shapes We Install
Arched (Radius) Top
A rectangle with a curved top, either a true half-circle radius or a flatter segment or eyebrow arch. Used as fixed glass or built into casement, single-hung, or double-hung units. Common on Victorians, Mediterranean-style homes, and 1990s and 2000s entries.
Half-Round
A half-circle, usually fixed, set above a window, door, or window group. Often mulled to a picture window or a pair of casements below it. The half-round's width must match the unit below closely, or the joint and trim will look off.
Quarter-Round
A quarter-circle, usually used in pairs at the outer corners of a gable or flanking a center window. Each one is built left- or right-handed, so both are measured and ordered together to match.
Circle and Oval
Round or elliptical windows, often called bullseye or oculus windows, used in gable ends, stairwells, and bathrooms. Almost always fixed. Because there is no flat sill, the flashing and trim take more care than on any other shape.
Trapezoid and Pentagon (Gable-End)
Angled tops that follow the roof pitch, stacked above rectangular windows on a gable wall or vaulted living room. Common on contemporary homes and on 1970s and 1980s houses with tall window walls.
Transoms
Rectangular or arched windows above a door or a larger window. Fixed transoms bring in light; operable awning-style transoms also vent warm air. A defining detail of many Portland Craftsman and Victorian homes.
Octagon and Other Custom Shapes
Octagons, triangles, and one-off shapes built to a template. Used as accent windows or to fill an opening no standard unit will fit. Not every manufacturer builds every shape, so availability is checked before quoting.
Shaped windows are available in vinyl, fiberglass, wood, and clad-wood frames, though not every manufacturer builds every shape in every material. Very tight radii and very small units have the most limits. Vlad checks what is available for your exact shape before quoting.
Specialty Window Installation — What the Project Involves
Specialty Windows in Historic Portland Homes
Craftsman and Victorian Transoms
Many Portland Craftsman bungalows and Foursquares have rows of small transoms above living room windows, and Victorians often have transoms and arched tops over doors and tall windows. When the sash is sound, repair and weatherstripping may be the better choice. When the wood is rotted through or the glass is long gone, we replace the unit in the same shape and proportions so the facade stays intact.
Leaded and Decorative Glass
Original leaded or stained glass is hard to replace once it is gone. Common options are keeping the original panel and protecting it with exterior glazing, moving a panel to an interior location, or replacing the window with insulated glass that carries decorative or textured glass or a grille pattern. Re-leading an original panel is specialist stained-glass work; Vlad will tell you at the estimate which parts of the job we handle and which need a stained-glass studio. Because the metal came contains lead, these panels are always handled with lead-safe containment.
Historic District Review
If your home is in a Portland historic or conservation district, or is an individually listed landmark, replacing windows on visible elevations may require review before work starts, and the rules can affect shape, material, and grille pattern. Plan for that review in your schedule. Check our guide to Portland historic district exterior rules, and see our historic home contractor page for how we approach older houses.
Fixed vs. Operable Shaped Windows
Shapes That Stay Fixed
Most specialty shapes are fixed. Half-rounds, quarter-rounds, circles, ovals, and steep trapezoids are difficult or impossible to build as reliable operable sashes, and many sit too high on the wall to reach anyway. Fixed units also have no moving seals, so they are the tightest, lowest-maintenance windows in the house. The only routine care is keeping the exterior sealant joints and trim in good shape.
Shapes That Can Open
Arched-top windows can often be built as casement, single-hung, or double-hung units, and rectangular transoms can be built as awnings for venting. If a room needs airflow, a common approach is a fixed shape on top mulled to an operable window below, which keeps the look and puts the moving parts within reach.
Glass and Shading Considerations
Large gable-end and west-facing shaped windows can bring in a lot of afternoon heat in summer. Low-E glass helps, and some homeowners choose a tinted or higher-performance coating on just those units. Shades for arches and trapezoids exist but are custom and costly, so we discuss glass choices first. Tempered or laminated glass may be required where a window sits low, near a door, or over a stair; we confirm what applies to each opening.
Lead Times and Ordering Custom Shapes
Why Shaped Windows Take Longer
Every specialty shape is built to order, and curved frames and glass take extra steps at the factory. Lead times are longer than for standard rectangles, commonly about 6 to 12 weeks from order, and longer for custom colors, wood interiors, decorative glass, or unusual shapes. We give you a delivery estimate in writing with the quote.
Planning Around the Wait
If you are replacing the rest of the house at the same time, we order the shaped units first so everything arrives together. If a failed shaped window is leaking now, Vlad can talk through temporary protection for the opening at the estimate. If only the sealed glass has fogged and the frame is sound, window glass replacement in the existing frame may be faster and less expensive.
Client's Talk
Serving Portland Metro Area
VResh Construction provides window replacement, siding installation, roofing, dry rot repair, and full exterior renovation services throughout the Portland metro area and Southwest Washington.
Portland Metro — Oregon
- Portland, OR
- Oak Grove, OR
- Cedar Mill, OR
- King City, OR
- Happy Valley, OR
- Clackamas, OR
- Milwaukie, OR
- Gresham, OR
- Wood Village, OR
- Scappoose, OR
- Sandy, OR
- Newberg, OR
- Estacada, OR
- Lake Oswego, OR
- Beaverton, OR
- Hillsboro, OR
- Tigard, OR
- Sherwood, OR
- West Linn, OR
- Oregon City, OR
Southwest Washington
Extended Service Areas
Specialty and Shaped Window FAQs — Portland Homeowners
How much do specialty and shaped windows cost in Portland, OR?
A small fixed transom or half-round typically runs about $600 to $1,500 installed in the Portland metro. Larger arched-top windows, gable-end trapezoids, and combinations mulled to other windows often run $1,500 to $3,500 or more, and operable shaped units, wood frames, and decorative glass add to that. Rot repair and trim work are priced separately. We give you an itemized written estimate after measuring or templating each opening.
Can arched or round windows be opened?
Some can. Arched-top windows can often be built as casement, single-hung, or double-hung units, and rectangular transoms can be awnings. True half-rounds, circles, ovals, and steep trapezoids are almost always fixed. A common solution is a fixed shape above an operable window.
How long does it take to get a custom-shaped window?
Shaped windows are built to order. Expect roughly 6 to 12 weeks from order to delivery, and longer for wood, custom colors, decorative glass, or unusual shapes. Installation usually takes a few hours per unit, longer for high gable windows that need scaffolding or for openings with rot repair.
Why do you make a template instead of just measuring?
Many older arches are not true circles, and many openings are slightly out of square after decades of settling. A full-size template captures the real shape so the new window fits the opening and the existing trim. Simple half-rounds and trapezoids can usually be measured without one.
Should I replace the leaded glass in my old home?
Not automatically. Original leaded glass often can be kept and protected with exterior glazing, or moved to an interior location. If the panel is beyond saving or the window frame has failed, a new insulated window with decorative glass or a grille pattern is an option. We handle these panels with lead-safe practices either way.
Can you replace the transom windows on my Craftsman?
Yes. We replace transoms in the same size, shape, and proportions so the facade looks right, and we repair rotted framing around them. If the sash is still sound, we will tell you whether repair and weatherstripping make more sense than replacement.
Do I need approval to replace windows in a historic district?
It depends on the district and the work. In Portland historic and conservation districts and on landmark properties, window replacement on visible elevations may require review before work starts. Vlad confirms at the estimate what applies to your home.
Can a shaped window match my other new windows?
Usually, if all the windows come from the same manufacturer and product line. Frame color, glass, and grille pattern can be matched, though not every line offers every shape. We check availability for each shape before you commit to a window line for the whole house.
Get a Free Window Estimate
Vlad comes out, measures or templates every shaped opening, checks the framing and trim, and tells you plainly what to keep and what to replace. You get a straight written quote with a delivery estimate, with no sales pressure and no commitment required.
- Same-day response on all estimate requests
- No commission-based sales, just honest quotes
- Licensed OR #241979 · WA #VRESHCL776ND
- EPA Lead-Safe Certified for pre-1978 homes
- Flashing shaped to every curved and angled head
