Half Circle Window Replacement by Ecoline
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Manufacturing and replacement ENERGY STAR® Rated & NAFS-22 tested windows and doors
Made in Canada
All Ecoline windows and doors are built in Ontario, Canada
- Top-of-the-line machinery (Forel, Gracco, Bottero) to produce the best products
- Over 180,000 sq. ft manufacturing plant
- Energy Star-rated and NAFS-22-tested
- Manufactured for local weather conditions
Learn more about Ecoline Windows or contact us to discuss your replacement project.
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What Is a Half Circle Window?
A half circle window, sometimes called a half round, semi-circle, or half moon window, is a fixed window shaped like the top half of a circle. Its straight bottom and curved top make it a popular way to bring in natural light, add visual height, and give a home extra architectural detail.
Most half circle windows are fixed and do not open. They are often placed above picture windows, entry doors, staircases, or garage windows, or included in custom window designs. For airflow, homeowners usually add casement, awning, slider, or hung windows underneath.
Shop Half Circle Windows with Ecoline
Custom-shape windows installed across residential projects
Over 20 years of experience in custom window replacement
Available in 7 provinces across Canada
Half circle windows for any opening size
4 Best Half Circle Window Configurations
Large Semi Circle Window Over Picture Window
Placing a half round window above a picture window makes a wall look bright and elegant, while keeping the main glass area simple and open. This design is great for living rooms, staircases, front exteriors, and high ceilings where you want more daylight without extra hardware.
Half Round Transom Window Over Door
A half round transom window above an entry door lets in more natural light and makes the entrance look taller and more stylish. People often use this above front, garden, or patio doors to brighten the space while keeping privacy and a balanced look.
Half Circle Window Over Casement Window
You can pair a semi circle window with casement windows below or on the sides if you want both style and fresh air. The curved top gives the window character, and the casement parts offer ventilation, a good seal, and easy use.
Half Circle Window for Bathrooms or Staircases
A small circle window is a good choice for bathrooms, staircases, or high walls when you want natural light but not a regular rectangular window. In bathrooms, privacy glass keeps the space bright while blocking the view from outside.Half Round Window Price
The cost of a half round window varies based on its size, glass type, frame colour, custom options, and whether it is installed alone or with other windows. Since half moon windows are custom-shaped, we need to measure your project before providing a final quote. Check the approximate prices for half circle windows with triple-pane glass below:
| Window Size | White | Coloured |
| Small | $1,510 – $1,730 | $1,661 – $1,903 |
| Medium | $1,740 – $1,995 | $1,914 – $2,195 |
| Large | $2,120 – $2,335 | $2,332 – $2,569 |
Note: The prices listed in the table are average estimates and may change depending on your window size, style, glass choices, and installation. For the most accurate pricing, use the window cost calculator on the right. It only takes about 30 seconds, and our expert will contact you asap with a detailed quote for your specific project.
Our Custom Shape Window Collection
Come Visit Ecoline in Your City!
We are always happy to chat with our customers face-to-face. Feel free to visit any of our showrooms across Canada to learn more about our products and services.
