What is Classed as Standard Window Sizes in the UK?

From quaint cottages to modern apartments, homes in the UK come in all sorts of styles, and so do their windows.

While there’s technically no universal ‘standard’ size for replacement windows, there are common dimensions that can give you a useful ballpark when planning your project.

Knowing typical window sizes can help when comparing quotes, but don’t worry too much, your installer will always take precise measurements to make sure everything fits perfectly.

UPVC Windows

A go-to choice for many homeowners thanks to their low maintenance and affordability. Common sizes include:

  • Heights: 600mm, 1050mm, 1200mm, 1350mm, 1500mm
  • Widths: 488mm, 630mm, 915mm, 1200mm, 1770mm
UPVC Windows in Anthracite Grey

Casement Windows

One of the most popular styles in the UK, these are the classic side-hinged windows:

  • 635 x 890mm
  • 736 x 1194mm
  • 736 x 1498mm
Casement Windows

Tilt & Turn Windows

Loved for their versatility and easy upkeep, these typically come in:

  • Single: 600 x 500mm (min), 1900 x 1300mm (max)
  • Double: 600 x 1200mm (min), 1700 x 2400mm (max)
  • Triple: 600 x 1600mm (min), 1900 x 3000mm (max)
Tilt and Turn Windows

Room-by-Room Window Considerations

Bathroom – Usually smaller for privacy, often with frosted or patterned glazing.
Living Room – Typically features the biggest windows in the home for maximum daylight.
Kitchen – Often has shorter windows placed higher on the wall—perfect above the sink.
Bedroom – There’s more variety here, with options ranging from wide, light-filled panes to snug windows for creating a cosy feel.

Measuring Windows with a Tape Measure

How Materials Affect Window Sizing

The type of material used for your windows can also impact available sizes:

UPVC – Generally follows standard sizes, making it budget-friendly and easy to install.
Timber – Often bespoke, especially for older homes or properties with unique architectural features.
Aluminium – Allows for slimmer frames and larger panes, ideal for a sleek, modern finish.

White Window Ajar

At Budget Windows, we believe in offering great value without cutting corners. That’s why we always take careful, on-site measurements to make sure your new windows are a perfect fit, both practically and aesthetically.

Want to know more? Get in touch with our friendly team today for a free, competitive quote.

LOOKING TO REPLACE YOUR WINDOWS?

We have a fantastic range to choose from so whether it’s a modern style or traditional timber effect windows – we are confident that we will have windows to improve any home to give it the finished look with elegance.

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LOOKING TO REPLACE YOUR WINDOWS?

We have a fantastic range to choose from so whether it’s a modern style or traditional timber effect windows – we are confident that we will have windows to improve any home to give it the finished look with elegance.

VIEW WINDOW RANGE

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