Home Modern Sash Windows with Energy-efficient Double-Glazing

Modern Sash Windows with Energy-efficient Double-Glazing

We are Sash Windows London, a family-run window company. We provide all our customers with a friendly and reliable approach to customer service, helping you find the perfect windows for your home.

Get Looks and Performance with Modern Sash Windows

Our installations can deliver the aesthetic and functional benefits you get in a boutique hotel or luxury home.

We can fit these fabulous windows into most sash window spaces, including box sash windows. Key benefits of our timber and UPVC sash windows include the following:

  • Low maintenance: Cleaning your windows is easy with our windows, which will be finished to the highest standards to resist any window cleaning products and the effects of weather. Our UPVC sash windows are also wipe-cleanable and will never experience any effects of rot or lack of maintenance.
  • Noise-reduction: Many period properties in busier areas can lose their appeal when there is a bleed in of daily traffic noise and other loud bugbears of modern living. With double-glazing and airtight, draught-proof frames we can effectively reduce noise to help you sleep better and reduce noise disruption within the home.
  • Higher property values: While a period property is desirable many prospective buyers of Georgian and Victorian homes consider old windows an essential repair to complete before buying or moving in. You can eliminate this concern and even boost the final value of your property by investing in modern sash windows.
  • Customisable features: If you would like to add a finish to your windows, or regulations dictate a specific appearance for windows on a listed or period property, you can customise your windows to suit. Different types of glass, such as opaque or patterned glazing for bathroom windows, and Georgian bars are all possible custom options.


Replacing your sash windows will deliver tangible benefits to your standard of living. Thanks to greater energy efficiency your fuel needs and costs will lower, and the seals within the glazing and frames reduce humidity, condensation and the likelihood of mould. Modern sash windows are a smart long-lasting upgrade.

10-year warranty on upvc windows

10-year warranty on glazing

5-year warranty on ironmongery & seals

Why Choose Us?

We provide modern sash windows with designs featuring high-quality UPVC and timber materials, for excellent energy efficiency and better security in conservation areas or period properties. As first-class providers of sash window work we will deliver the best results in any situation, which means we can create authentic modern designs on either a period property or a new build.

Great range

We can create sash windows with authentic looks, that incorporate all the modern benefits of window design. We offer exceptional timber windows as well as UPVC frames, with heritage designs also available

Professional installations

Our high-quality installations, which will resist weather and wear for the longest possible time โ€“ and use the highest levels of workmanship to reduce the need for any sash window repairs. We can fit energy-efficient, draught-proof double glazing to a period property or listed buildings โ€“ including many Georgian and Victorian homes in London.

Quality mechanisms

We use simple and sturdy mechanisms, with even sash weights โ€“ so all sliding sash windows can be easily opened and closed as well as securely locked

Order Stunning Sash Windows

We will give you an outstanding result and a first-class experience throughout the design and installation of your modern sash windows.

Our team only delivers the best โ€“ with top-quality workmanship, the latest tools and the best products available.

You can get energy-efficient modern windows with sash designs for many period properties and listed buildings that are common throughout the UK, particularly where we operate in London Explore our brochure to learn more, or speak to a member of our team to get started.