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How much does a bay window cost to install?

January 3, 2023

Bay windows haven’t become a UK property mainstay for no reason.  

That striking style brings with it increased natural light, ventilation and additional space, elevating a home’s design and value.   

Despite their perpetual popularity, a large number of homeowners are still completely in the dark when it comes to installation costs.

Naturally, these will vary depending on the type of project, but on average, homeowners should be expecting to pay in the region of £1,000 for a three-panel bay window, along with £300 – £500 for labour.  

What are the most popular types of bay windows?

  • Canted bay window. Say ‘bay window’ and this is the style most people will envision. A timeless classic, the canted bay window boasts a flat front and two angled sides. It was an extremely popular design in Victorian times, but has become a contemporary favourite in recent years.
  • Bow bay window. Whereas canted bay windows normally consist of three glass panels, the bow bay alternative usually consists of four or five. They also tend to be more curved, adding a rounded aesthetic to the exterior of a property.
  • Box bay window. No prizes for guessing the shape of a box bay window. With flat sides, a flat front, and a roof, these striking rectangular designs are becoming an increasingly popular option across the country.
  • Oriel bay window. One of the oldest forms of bay windows, the oriel style was a common sight on the first floor of early 20th Century guest houses, as they would provide holidaymakers with a better view.  Often supported by corbels, brackets, or similar cantilevers, modern versions can now be found on ground floor residential properties.

Why does the price vary for bay window installation?

  • Size. Bay windows come in all shapes, sizes and styles, meaning individual circumstances will always determine the total price. Height, width and projection/depth all need to be considered when carrying out the fitting, and while the vast majority tend to be bespoke designs, typical sizes include 41in and 124in (width) and 35in and 77in (height).
  • Materials. Bay windows can be made from a variety of materials, but the most common ones are uPVC, aluminium, and timber. uPVC is undoubtedly the most cost effective, and offers a range of benefits including durability, thermal efficiency and low maintenance.
  • Job complexity. Bay window installations can be extremely complicated, sending the price of a project soaring. While a straightforward like-for-like replacement shouldn’t cause any unforeseen issues, removing standard windows and constructing a bay from scratch is rarely going to be as simple. 

6 reasons to install bay windows in your home

  1. Looks. As far as distinctiveness goes, few windows come close to the classic bay design. Whether it be bay, bow, box, oriel, or one of the other variations, properties boasting bay windows truly have the aesthetic X factor. Historically associated with Victorian mansions, their traditional charm now makes them a real style statement on modern dwellings.
  2. Value. There’s plenty of substance to go with all that style as well. While homeowners may face a sizable outlay if they decide to replace their standard windows with a bay alternative, they should always consider the effect it is likely to have on the value of their property. Not only do bay windows make a house a more attractive proposition to potential buyers, they can add thousands to the selling price, too.
  3. Energy efficient. The buzz words on everybody’s lips at the moment. Turning your house green isn’t just good for the planet, it’s a way of helping lessen the impact of rising energy costs. To look at, bay windows – with all those openings and large panes of glass – may not appear the most energy efficient, but coupled with uPVC, an excellent insulator, and double glazing, heat will struggle to escape the confines of your cosy abode.
  4. Light and ventilation. Filling a property with natural light brings a wealth of benefits that some homeowners may not be aware of. Stress reduction, increase in productivity, mood boost; installing windows that maximise the sun’s rays can provide a genuine physical and emotional lift to occupiers. Bay windows’ large, angled design certainly ticks that box. On top of that, their multi-openings allow homeowners to increase the amount of airflow travelling through a property, which can freshen up the home while reducing the risk of mould and condensation.
  5. Interior attraction. Yes, bay windows can add an extra design dimension to the outside of any home, but they also look fantastic from the inside. Enhanced views are an added bonus, while the outward protruding shape also provides extra living space – perfect for a storage bench or reading chair.
  6. Versatility. Bay windows are one of the most versatile windows on the market. They come in a variety of shapes, sizes and colours, meaning they’re an option for any type of home, whether that be Victorian mansion or a contemporary new build. 

The type of property best suited to bay windows

While the scope of a project will vary quite significantly depending on a property’s structure, when it comes to aesthetics, bay windows do have the ability to look at home on almost any dwelling.

In recent years, they have become a common feature on modern new builds; however, those traditional characteristics mean they are still a vintage favourite. 

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