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.
- Window style: A straightforward casement window is much simpler to manufacture and fit than a bay window, which involves multiple panels, angled connections, and significantly more installation time. The more complex the style, the higher the price.
- Frame material: Standard white uPVC is the most affordable option, while aluminium and timber frames carry a higher price tag. Each material has its own balance of cost, performance, and aesthetics.
- Size: Larger windows need more material and more labour, so they naturally cost more. Oversized or non-standard dimensions can also push the prices further up.
- Number of windows: The total number you’re replacing affects the per-window price, as installers can often offer better rates when doing several in one visit. A full house replacement is almost always a better value than doing them one at a time.
- Energy rating: Windows are rated for their energy efficiency, with higher-rated glazing offering better thermal performance, but coming at a slightly higher upfront cost. That said, the energy savings over time can more than justify the difference.
- Colour and finish: Standard white uPVC is the base price. If you want a colour like anthracite grey, which is hugely popular right now, or a woodgrain finish, expect to add around 10 to 15% to 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 full house replacement rather than a single window, the total cost will depend on several factors. Consider how many windows your property has, what style you go for, and crucially, which frame material you choose.
Here’s a realistic breakdown by property type and material:
- For a mid-terraced house with around 6 to 8 windows, standard white uPVC casement windows typically come in at £3,000 to £5,500 all in.
- Step up to aluminium, and that same job rises to roughly £8,000 to £10,000, while timber frames can push costs to £12,000 to £20,000 depending on style. This is particularly the case if the property has sash windows, as is common in Victorian and Edwardian terraces.
- A three-bedroom semi-detached home with 8 to 10 windows is perhaps the most common scenario, and the price range reflects the material choices clearly. uPVC comes in at around £3,750 to £7,000, aluminium sits between £5,000 and £8,000, and timber frames typically land somewhere between £7,000 and £12,000 or more.
- For a larger four or five-bedroom detached house with 12 or more windows, budgets vary considerably.
- uPVC will generally cost between £6,200 and £10,000, aluminium from around £10,000 to £15,000, and timber or premium composite frames can reach £20,000 to £25,000 for a full replacement.
Sometimes you need to pay more if the property has architectural features, bay windows, or non-standard sizing.
One thing worth keeping in mind: replacing all your windows in one go is almost always a better value per window than doing them piecemeal.
Installers spread their mobilisation and labour costs across more units, and most will offer a discount for larger projects. A good team can typically fit 6 to 10 standard windows in a single day, so a full semi-detached replacement is usually done within two to three days.
Larger or more complex properties, particularly those needing scaffolding for upper-floor access, will naturally take a little longer. Plus, it can add £700 to £2,000 to the overall bill.
Are New Windows Worth the Investment?
The short answer is yes, especially if your current windows are single-glazed or older double-glazing from before the mid-2000s.
The Energy Saving Trust estimates that upgrading from single glazing to A-rated double glazing can save around £140 a year on energy bills for a semi-detached home.
If you’re replacing older double glazing that is no longer performing well, the Glass and Glazing Federation suggests current-standard windows could still save you up to £235 a year. Those savings add up quickly over the 20 to 35-year lifespan of a well-installed window.
Beyond energy bills, new windows bring a whole range of other benefits. Modern multi-point locking systems are far more secure than older designs.
Better glazing and seals drastically reduce noise from outside. This is something many homeowners underestimate until they experience it.
Condensation between the panes, cold draughts, and sticky frames are all things of the past. And from a property perspective, good-quality double glazing is one of the upgrades that buyers consistently look for, adding both appeal and value to your home.
It’s also worth noting that the payback period for new windows has shortened considerably in recent years. Historically, it was estimated at around 19 years. With today’s energy prices and the improved thermal performance of modern glazing, many experts now put it closer to 9 or 10 years.
How to Get the Best Price on New Windows
Getting good value doesn’t mean going for the cheapest quote. It means getting the most out of your budget, and here’s the best way to do that. Just five practical things to keep in mind.
Always Get at Least Three Quotes
Prices can vary surprisingly between installers, and having multiple quotes gives you a much better sense of what’s reasonable in your area. When comparing, make sure you’re comparing like for like.
Check whether prices include VAT, installation, waste removal, and finishing trims, as some cheaper-looking quotes exclude these.
Know Where You Can Save, and Where You Can’t
If the budget is tight, standard white uPVC casement windows are the most cost-effective choice and still offer excellent performance.
Coloured frames, woodgrain finishes, or premium styles like flush casements and vertical sliders all add to the cost, so it is worth considering where those upgrades will have the most visual impact and prioritise accordingly. The front of the house, for instance, is usually worth spending a little more on than a rear utility room.
Don’t Sacrifice Quality to Save Money Upfront
A well-installed, properly rated window from a reputable installer will last decades and come with a meaningful guarantee. In contrast, poorly fitted or low-specification windows can cause damp, draughts, and condensation issues that cost far more to fix than the money saved upfront. The cheapest quote is rarely the best value over the long term.
Check Whether You’re Eligible for a Grant
It’s worth checking whether you qualify for any financial support before committing to a purchase. The Warm Homes Local Grant, launched in April 2025, can provide eligible lower-income households in England with up to £15,000 towards energy-efficient home improvements, which can include double or triple glazing.
Eligibility is based on household income and location, so check with your local authority to find out what’s available in your area.
Choose a FENSA-Registered Installer
Look for installers who are FENSA-registered or members of another competent person scheme. This means the work will be self-certified as meeting building regulations, saving you the hassle and cost of applying for building control separately.
It also gives you greater peace of mind about the quality of the work and the products used. And it matters when it comes to selling your home, as buyers and solicitors will ask for the paperwork.
Get a Free Quote for New Windows in Chester
If you’re based in Chester or the surrounding area and you’d like to find out exactly what new windows would cost for your home, Prime Glazing double glazing experts in Chester, offers a free, no-obligation quote.
We take the time to understand what you’re looking for and recommend the right solution for your property and your budget.
From classic casement and flush casement windows to tilt and turn, vertical sliders, bay windows, and sleek aluminium frames, our range covers every style and specification. Get in touch today and let’s talk through your options.