Featuring a design and mechanism that is centuries old, the sash window is amongst the most classic of choices when it comes to window styles. Enhancing both the look and energy efficiency of your property, while the design of the sash might be ancient, the quality and ergonomics are very much modern-day.

Popular throughout history, sash windows is mostly associated with the Georgian and Victorian periods, where it became the staple choice of high-end homes throughout the UK.

What is a box sash window?

The box sash gets its name from the fact that the mechanism of weights and pulleys used to lift the heavy window would be contained within a box built into the sides of the window. Since then, this system has been updated to spiral balances to prevent the wear of the sash cord and therefore any faulty functioning. Box sash windows are also sometimes called ‘sash and case’ or ‘hung’ sash windows. You can find out more about how sash windows work in our guide.

Do sash windows suit any property?

In short, yes – sash windows can be installed to any property and look equally as attractive when done so. You will need, however, to be sympathetic to your surroundings and ensure that installing this type of window is a worthwhile investment. Ask yourself how long you plan to stay in the property, or, if you plan to sell, how much the windows add to the value of your home.

Box sash windows are a hugely popular choice for people renovating period properties or replacing existing sash windows. If you’re still unsure, you might want to read our beginner’s guide to sash windows.

Do I need planning permission to install sash windows?

You don’t typically need planning permission for sash windows if you’re installing ‘like for like’ windows, i.e. when you are replacing existing sash windows with new sash windows.

However, it is worth checking the requirements with your local planning authority as it could differ from area to area. If you live in a historic building, you may also be under an obligation to preserve the existing windows. For further advice on this, feel free to get in touch with us.

Get in touch with the sash window experts in London

If you’d like a free quote for your sash window installation, don’t hesitate to get in touch. You can reach us by calling 07772345212 or by sending an email to [email protected].