Traditional Sash Windows in London

Restore the elegance and refinement of your period property with our traditional timber sash windows. Beautiful aesthetic and perfect functional features can reclaim the original period nature of the building and improve both the façade and interior of your property 

A sash window consists of a number of glass panes in a grid formation and usually opens vertically at the top and the bottom. In essence, it works based on a system of weights and pulleys. A casement, or hinged window, usually consists of one pane and opens outwards. This comparative simplicity made the hinged window cheaper and easier to produce and install, which was crucial during the war-time period in London and why it overtook the sash in popularity.

However, in recent years, with the growing desirability for period homes, the sash window has gained an iconic status. Not only are traditional wooden sash windows aesthetically pleasing from the inside and out, their installation, or restoration, is now a highly sought after feature by buyers, which consequently, increases the value of a property.

Traditional Sash Windows in London — houseUP London
OUR TRADITIONAL SASH WINDOW SERVICES

OUR TRADITIONAL SASH WINDOW SERVICES 

At houseUP, we have limitless passion for period projects and reinstalling or restoring traditional sash windows is one of our services that brings us the most pleasure. As experts who work with skilled craftsman, we would love the opportunity to return your property to its original distinction and style.

As well as more unique or completely bespoke services, some of our common requests for sash windows are:

  • Box sash windows
  • Bay sash windows
  • Victorian and Georgian sash windows
  • Sash windows with shutters
  • Sash window restoration and repairs
  • Sash window sealing
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HISTORY OF SASH WINDOWS

HISTORY OF SASH WINDOWS 

The exact origins of the sash window lack evidence and is therefore widely debated. Some historians suggest Holland in the 17th century, and some suggest France can lay claim to their invention. The French theory being rooted in etymology; 'sash' coming from the French chassis, meaning 'frame' in French. Others even argue that the Englishman and polymath, Robert Hooke was responsible.

Whatever their beginnings, traditional sash windows grew in popularity during the Georgian and Victorian periods and was the most common construction method for windows at the turn of the 19th century. This trend was short-lived and with the introduction of hinged windows, around the start of the First World War, and they fell out of favour.

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    TRADITIONAL SASH WINDOWS AND MODERN GLAZING 

    Poor insulation in the form of ill-fitting windows, cracked panes of glass, or lack of seals could be responsible for high household energy consumption. Improving the efficiency of your windows and upgrading your glazing could see a significant reduction in your energy bill.

    To ensure your period property has its modern comforts, we provide the following glazing services with our installation if required:

    TRADITIONAL SASH WINDOWS AND MODERN GLAZING

    DOUBLE-GLAZED SASH WINDOWS 

    Providing the existing sash has a depth of at least 35mm, we can replace the current glass planes with double-glazing. If the sash is not the necessary depth, we might suggest crafting a new sash to fit the original frame. This is not only a way of preserving the history of the property, but more cost-effective than a full replacement, although we can offer this too.

    DOUBLE-GLAZED SASH WINDOWS

    TRIPLE-GLAZED SASH WINDOWS 

    As well as energy efficiency, triple-glazing offers effective acoustic reduction. However, where a 35mm depth in the original frame is required for double-glazing, 40mm is required for triple.

    TRIPLE-GLAZED SASH WINDOWS

    SECONDARY GLAZING SASH WINDOWS 

    Where double-glazing is a single window comprising two panes of glass separated by an insulating gas, secondary glazing is additional window installed behind an existing window. As there is no alteration to the building's original design, this makes secondary glazing the ideal, and sometimes only, option for listed buildings or buildings in conservation areas. What's more, secondary glazing offers significant draught reduction and energy efficiency that surpasses double-glazing. It is also an effective acoustic insulator.

    SECONDARY GLAZING SASH WINDOWS

    OUR BESPOKE SASH WINDOWS 

    Typical requests in London tend to be trational Georgian sash windows, or Victorian sash windows. However, if you are hoping for something truly unique and breathtaking, we are always excited by a challenge and can present to you a range of less familiar window shapes and styles.

    Although arguably the most appealing draw to sash windows are their unparalleled beauty, it's not only about aesthetics. Once you have settled on a design, we can customise other features such as materials, efficiency and security.

    OUR BESPOKE SASH WINDOWS
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    THE NEXT STEP IN SASH WINDOW INSTALLATION

    THE NEXT STEP IN SASH WINDOW INSTALLATION 

    Whether you are in need of completely replacing the existing windows in your period property for elegant sashes with thermal reduction and reduced noise pollution, or hope to enhance the charm and appeal of your new build by installing a stunning set of wooden box sash windows, we want to guide you through that journey.

    Our property-centred and carefully planned projects use high quality, reliable and durable materials at competitive prices, ensuring not only a sought-after traditional aesthetic, but peace of mind in that your creation is long-lasting and value-adding. Our confirmed commitment to the best customer service reassures that we are reliable, approachable and provide excellent craftsmanship and care when it comes to sash window installation and restoration. At the forefront of our values is sustainability in construction and preserving the environment. It's important to us as a company and a thought leader in our industry to use environmentally-friendly construction materials and be conscious of energy consumption. With this in mind, and if in alignment with your own values, we will opt for using sustainable timber and ensure the installation of your windows is as energy-efficient as possible.

    With no obligation, we would like to hear any questions or concerns you have regarding sash windows, be it pricing, materials options, or length of the project, so that you and your property can experience the most beautiful, environmentally-considerate sash windows in London.

    Traditional Sash Windows in London — FAQs

    Questions and answers

    Common questions about our traditional sash windows in london service

    • What Is A Sash Window 

      A sash window consists of a number of glass panes in a grid formation and usually opens vertically at the top and the bottom. In essence, it works based on a system of weights and pulleys. A casement, or hinged window, usually consists of one pane and opens outwards. This comparative simplicity made the hinged window cheaper and easier to produce and install, which was crucial during the war-time period in London and why it overtook the sash in popularity.

      However, in recent years, with the growing desirability for period homes, the sash window has gained an iconic status. Not only are traditional wooden sash windows aesthetically pleasing from the inside and out, their installation, or restoration, is now a highly sought after feature by buyers, which consequently, increases the value of a property.

    • How Much Do Sash Windows Installation Cost? 

      Whether you are planning to install sash windows for the first time, replace existing sashes, repair or refurbish, one of our expert team will pay a site visit in order to make an assessment to better provide you with an accurate quote. All our projects are viewed as bespoke and are therefore, priced on an individual basis.

      Some of the factors we will assess are:

      • size of the window; height and width
      • type of window and complexity; box, bay or more uniquely shaped, i.e. arched, or swept head, and the number of panes desired materials; timber, uPVC, aluminium; timber is usually the most expensive and uPVC the least
      • type of finishes; i.e. decorative horns and fasteners
      • glazing; double, single, triple, secondary etc.
      • draught-proofing
      • number of windows requiring replacement throughout the property accessibility

      As an average guideline, we can suggest that replacing a simple (in terms of design), average-sized, double-glazed, timber sash window in London will cost approximately £1500.

    • How Much Do Sash Windows Refurbishment Cost? 

      If your property is already blessed with sash windows, a more affordable option might be either restoration or refurbishment. This could involve stripping back paint, replacing or restoring rotting wood, and replacing sash cords and hardware. If required, installing double-glazing and adding draught-proofing can also be included. Depending on the amount of work necessary, costing begins at approximately £500.

      Although the initial outlay involved in window replacement or restoration may seem daunting, it is worth remembering that improved glazing and draught-proofing can improve household energy efficiency and therefore lower energy consumption and associated costs.

    150+Projects completed across London
    10+Years delivering premium construction
    2London offices Covent Garden & Hackney
    A–ZFull service Design to completion

    Why choose houseUP

    01

    Listed Buildings & Conservation Areas

    We specialise in Grade I and Grade II listed buildings and conservation area projects across London — from Highgate to Chelsea. Our conservation architects understand the constraints and navigate them for you.

    02

    Transparent, Detailed Pricing

    Every quote is itemised with material costs, labour, and timelines clearly set out. We list prices on our service pages because we believe you deserve to know what you're paying for.

    03

    One Team, Full Accountability

    From first survey to final snagging, the same project manager oversees your build. No handoffs between contractors, no gaps in responsibility — just one point of contact throughout.

    PROJECTS FEATURED IN:

    Architects' JournalDezeenGrand DesignsReal HomesRIBA JournalThe World of InteriorsBest Houses

    Reviews

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    It was a pleasure working with Vincenzo, Gen and their team. They have such an eye for detail and we worked well as a team to produce a project the client was very happy with. They are professional. We would highly recommend.

    Juliette ByrneArchitectural & Interior design

    Working with HouseUP on two challenging Conservation Area / Grade I listed apartment renovations in London recently has been a true pleasure. Their availability, enthusiasm, very collaborative approach, skilled staff, and dedicated and diligent site management made a huge difference to bring these projects to successful completion. Addressing issues as they arise on historic apartment buildings, and calmly making sure they are successfully resolved, made a huge difference. We have no hesitation recommending HouseUP, warmly and highly.

    LISA M.HIGHPOINT I

    houseUP did a 4 month complete renovation of our flat in South Kensington. We were very pleased with their work. Vincenzo put together a great team led by a very capable site manager. They used high quality subcontractors for plumbing and electricity. They communicated well and in a timely manner with our project manager regarding issues and problems. They also worked well with the 3rd party MEP engineer and they handled minor issues with neighbours professionally. Works were completed on time (critical due to Covid restrictions) and on budget. All three tenders were similar in price, but houseUP’s was the most comprehensive/detailed which made it easy to evaluate.

    HARALD E.SOUTH KENSINGTON

    I used houseUP to renovate a flat in Shoreditch whilst I was overseas. I would certainly recommend them as, whilst expensive, they provide an excellent service and undertook to make the process as pain free as possible for me. They also worked well with my designer.

    KATE V.SHOREDITCH

    I would absolutely recommend Vincenzo and the houseUP team. They completed an 8 month full refurbishment/extension of our house at the end of 2019. They managed every detail of the project and did so with such a high level of care - often it felt like they were carrying out works to their own house! They were always available to discuss when needed and kept us in the loop as required (but didn't over burden us with issues they could easily resolve themselves). We are delighted with our new family home and I feel like the process was made so much less stressful by using houseUP.

    SARAH GWILLESDEN

    Vincenzo and the team were enthusiastic, creative and engaged. They brought the project in on budget and I'm happy to recommend them. Their approach of having in-house structural engineering really helped make savings by integrating the disciplines involved with design and construction.

    ANDREW W.CHISWICK

    A team, that is an absolute pleasure to deal with. Professional, helpful and responsive, with a direct approach to projects. Look forward to continue working together in the future.

    VITA ARCHITECTUREChelsea

    We highly recommend houseUP. As architects, it is always difficult to find good contractors and houseUP and the team are very professional and have great communication skills. Looking forward to working with them in the future.

    WHITE RED ARCHITECTSChelsea

    I hired houseUP after meeting with Vinz and the team - I found them down to earth, easy to deal with and very flexible and fair with me, unlike many other companies we asked to quote our project. They completed a double storey side extension and rear extension for me, plus complete renovation of my house. We have recently moved back into our house after completion of the project, and could not be more happy. Even if there are any issues at this stage, they are always on hand to help and put things right. It was daunting having to think about a company to do such major works for us, however Vinz was great all throughout the project and helped us achieve what we wanted. He was always available to speak to, and is knowledgeable and friendly. The transparency is something I do not think we could have got with most other companies, and for this I am grateful. Thank you guys!

    JUNAID C.GANTS HILL

    The houseUP team came to the rescue to renovate our penthouse in Shoreditch, London, after our first builders did a runner. They are great guys and trustworthy, they're real construction professionals and manage their subcontractors well to ensure a good quality of finish.

    JAMIE AND LULUSHOREDITCH

    Vincenzo, Mike and their teams of subcontractors are a breath of fresh air to the construction market. They are extremely well organised and professional, providing a high end service, with clear and constant communication to clients throughout their projects, no matter how big or small. Alison's rear extension was the first thing we completed with the houseUP team and we never stopped working together since our first construction project. We enjoy working with houseUP as the projects are realised with ease, on time and on budget. We highly recommend these guys to all of our clients for construction projects of all sizes in London and beyond!

    MODEL PROJECTS (DESIGNERS)Chelsea
    London construction company
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