How Much Do New Windows Cost?
If you’ve been putting off replacing your windows because you’re not sure how much it will cost, you’re not alone. Prices vary widely, so it’s not always easy to set a realistic budget. Then again, new double-glazed windows can cut your energy bills significantly, by around £140–£235 a year, slash noise by 20–35 dB, stop draughts and reduce carbon footprints. New can boost security and add 5–10% to your property value, so this all adds up to a home improvement project worth doing sooner rather than later. In this guide, we’ll walk you through everything you need to know about new window costs, from a single casement window to a full house double glazing replacement. We’ll cover the different styles, materials, and the factors that can push prices up or bring them down. You can then make the best decision for your home. What Affects the Cost of New Windows? There’s no single price tag for new windows because so many factors come into play. Before we get into specific numbers, it helps to understand what is actually driving the cost. Cost by Window Type Let’s get into the specifics. All prices below are per window, and cover the supply and fit for standard-sized uPVC double-glazed units unless otherwise stated. These are realistic mid-range estimates for 2025/26. Actual quotes will vary depending on your location, the installer, window size, and your specific requirements. Casement Windows Casement windows are popular in Chester and throughout the UK, and it’s easy to see why. They’re versatile, efficient, and cost-effective. For most standard sizes, you’re looking at somewhere between £350 and £700 fitted, making them the most affordable style on this list. Hinged at the side (or top, in the case of top-hung opening versions), they open outward and provide excellent ventilation and a clean, unfussy look that suits almost any property. Whether you’re after a chamfered finish, sculpted beading, or a flush sash for a more modern look, you can tailor a casement window to your home without it costing a fortune. For most households, this is the sweet spot of performance and value. Flush Casement Windows Flush casement windows look almost identical to traditional timber windows from the outside because the sash sits flush with the frame rather than overlapping it. They typically cost between £500 and £900 fitted. It’s a little more than a standard casement, but justifiably so. They’re a fantastic choice for period properties or new builds wanting a more refined, heritage-inspired appearance. Modern uPVC flush casements can achieve A++ energy ratings and U-values as low as 0.9 W/m²K, making them a high-performance option that also looks beautiful. Tilt & Turn Windows Tilt and turn windows have grown hugely in popularity in recent years, and once you understand how they work, it’s not hard to see why. They can be tilted inward from the top for safe, secure ventilation, or swung fully open from the side for easy cleaning from inside your home. This flexibility makes them particularly appealing for upper floors or flats where reaching the outside of a window isn’t practical. Expect to pay around £500 to £800 for a standard uPVC tilt and turn window, which is roughly 25% more than an equivalent casement, reflecting the more complex dual mechanism involved. Vertical Slider (Sash) Windows Vertical sliders replicate the classic sliding mechanism of traditional sash windows, but in modern uPVC. They slide up and down rather than swinging open, giving them a timeless, elegant look that suits Victorian, Edwardian, and Georgian properties particularly well. Prices typically run from £600 to £900 for a standard uPVC unit. It’s around 50% more than a casement window, which reflects the additional materials and engineering involved. Today’s vertical sliders are a world away from the draughty originals, offering smooth mechanisms, easy-clean features, and multi-point locking as standard. Bay & Bow Windows Bay and bow windows sit at the top end of the cost scale, and that’s simply because they involve more of everything. They come with more panels, more glass, angled connections, and more complex installation. For a standard three-panel uPVC bay, expect to budget somewhere between £1,250 and £2,150, with larger structures, premium materials, or composite frames pushing prices up to £3,000 or beyond. Despite the cost, bay and bow windows remain a popular investment because they genuinely transform a room. They flood the space with light, create a sense of extra space, and add real kerb appeal to the front of a home. Aluminium Windows Aluminium windows have had something of a renaissance in recent years, driven by the appetite for sleek, minimalist design. Their slim frames maximise the glass area and allow significantly more natural light into a room compared to a bulkier uPVC equivalent. Prices range from around £500 to £1,200 per window. They typically sell at 25 to 40% more than a comparable uPVC unit. Then again, they’re exceptionally durable, won’t warp or discolour, and require very little maintenance, which makes the higher upfront cost easier to justify over the long term. How Frame Material Affects the Price If you’re still deciding between materials, here’s a quick summary of how they compare on price and practicality. uPVC is the most widely used frame material in the UK for good reason. It’s affordable, low-maintenance, thermally efficient, and available in a huge range of styles and colours. For most homes, it’s the natural starting point. Aluminium sits in the mid-to-high price band and appeals to those who want a more contemporary, architectural look with slim sightlines. It’s also an excellent long-term investment given how little upkeep it requires. Timber is the premium option, prized for its natural beauty and its suitability for listed buildings and conservation areas. It carries the highest price tag and needs more regular maintenance (painting or staining every few years), but nothing quite matches the look of a real timber frame on the right property. How Much Does It Cost to Replace All Windows in a House? If you’re looking at a