Choosing the right windows for your home isn’t just about aesthetics or energy efficiency; it’s also about understanding the cost implications. With UK window prices typically coming in at around £4,000 for an average three-bedroom property, it’s evident that windows represent a significant investment.
- What factors determine the cost of new windows?
- How much can you save?
- How can you ensure you’re getting value for money?
Our experts have examined the cost of new windows, including frame materials and window types, the best way to measure your window, and what else you need to consider.
What is the cost of new windows?
The cost of new windows varies significantly based on several factors. One of the primary determinants is the frame material. For example, uPVC window frames are less expensive than aluminium or timber.
Similarly, the style of the window can influence its price. Casement windows, double-hung windows, and bay or bow windows have their own pricing dynamics, reflecting the complexity of their construction and functionality.
The number of windows you want to replace or install can also alter the budget. Buying in bulk or outfitting an entire home may offer economies of scale, but it still represents a more significant cost than updating just one or two windows. Other considerations, such as custom sizes, special glazing, or enhanced energy efficiency features, can also play a role in determining the final cost.
What’s the difference in cost between window types?
The style of window you choose will affect the overall cost. It depends on the complexity of each design, and the level of window hardware required, such as extra locks or hinges.
Average casement window prices
Casement windows are a popular and versatile window style found in many homes. They are hinged at the side and open outwards, either to the left or right, similar to how a door operates. They swing out entirely, providing maximum ventilation and a clear view.
Since casement windows swing outwards, they may not be the best choice for areas directly adjacent to walkways, decks, or other places where the open window could obstruct or pose a hazard.
| Number of windows | Range low | Range high | Average cost |
|---|---|---|---|
| 8 uPVC casement windows | £3,000 | £5,000 | £4,000 |
| 15 uPVC casement windows | £6,500 | £10,000 | £8,500 |
| 20 uPVC casement windows | £10,000 | £13,000 | £11,200 |
Average bay window prices
Bay windows are a distinctive architectural feature that can add space, light, and charm to a home. They protrude outward from the main walls of a property, forming a bay or recessed area inside. They are typically a combination of three windows set at angles to each other. The central picture window is often parallel to the main wall of the house and is flanked by angled side windows.
Bay windows add a small, but often significant, amount of floor space to a room. This extra space can be used for various purposes, such as a cosy reading nook or a window seat with additional storage underneath.
| Window size | Number of panels | Average price |
|---|---|---|
| 2,400mm x 1,200mm | 3 | £1,725 |
| 3,000mm x 1,200mm | 3 | £2,000 |
| 3,000mm x 1,500mm | 3 | £2,200 |
Average bow window prices
Bow windows are often confused with bay windows due to their similar protruding design, but the two have distinct differences.
Bow windows are a curved or arc-shaped set of windows that extend outward from a building’s wall. They consist of a series of windows, usually four or more, that are the same size and shape. This series creates a gentle outward curve or bow-like appearance, hence the name.
| Window size | Number of panels | Average price |
|---|---|---|
| 2,400mm x 1,200mm | 3 | £1,725 |
| 3,000mm x 1,200mm | 3 | £2,000 |
| 3,000mm x 1,500mm | 3 | £2,200 |
| 3,000mm x 1,200mm | 4 | £2,300 |
Average sash window prices
Sash windows, also commonly known as double-hung windows, are an iconically traditional window style consisting of two panels, or sashes, arranged vertically. In the classic design, one or both sashes can be slid up and down within the window frame, allowing for opening and ventilation.
Sash windows have a timeless elegance and are often associated with period homes, predominantly Georgian and Victorian properties. Their design can add character and historical charm to a building.
Generally, sash windows are only available in uPVC or timber, though you may find some specialist suppliers offering the style in aluminium.
| Sash window material | 600 x 900mm | 900 x 1200mm |
|---|---|---|
| uPVC | £1,000 | £1,200 |
| Aluminium | £950 | £2,500 |
| Timber | £3,000 | £3,600 |
Average tilt and turn window prices
Tilt and turn windows are versatile and offer a unique functionality compared to traditional window designs. They are particularly popular in European countries and are increasingly being adopted in the UK.
A tilt and turn frame has a dual-functioning design. Depending on the handle position, it can tilt inwards at the top for ventilation and swing inwards like a casement window. When tilted, the narrow gap prevents accidents, which is especially important in households with young children or pets. The design also means you can have ventilation without a wide-open window.
| Tilt and turn window material | 600 x 900mm | 900 x 1200mm | 1200 x 1200mm |
|---|---|---|---|
| uPVC | £600 | £750 | £820 |
What window frame material is the cheapest?
Our research looks at the prices for the three most commonly seen frame materials – uPVC, aluminium and timber – providing average window prices for each material based on a simple casement style.
| Material | 600 x 900mm | 900 x 1200mm | 1200 x 1200mm |
|---|---|---|---|
| uPVC | £525 | £590 | £650 |
| Aluminium | £1,050 | £1,190 | £1,300 |
| Timber | £1,580 | £,1790 | £1,950 |
Average uPVC window prices
Unplasticised polyvinyl chloride, or uPVC, windows are a popular choice for residential properties, especially as manufacturers make frames available in a wide range of colours and finishes.
| Casement window material | 600 x 900mm | 900 x 1200mm | 1200 x 1200mm |
|---|---|---|---|
| uPVC | £525 | £590 | £650 |
Average aluminium window prices
Aluminium frames were once only seen in older double-glazed windows or industrial buildings. However, more people are choosing them for their homes, and manufacturers often offer a selection of coloured powder coatings.
| Casement window material | 600 x 900mm | 900 x 1200mm | 1200 x 1200mm |
|---|---|---|---|
| Aluminium | £1,050 | £1,190 | £1,300 |
Average timber window prices
Timber windows, often called wood windows, have been used for centuries and are manufactured from various types of wood – hardwoods such as oak and mahogany or softwoods like pine. Each type of wood has a unique grain, colour, and characteristics, which can influence the window’s aesthetic appeal, durability, and cost.
| Casement window material | 600 x 900mm | 900 x 1200mm | 1200 x 1200mm |
|---|---|---|---|
| Timber | £1,580 | £1,790 | £1,950 |
Secondary glazing vs double glazing
Secondary and double glazing are both methods used to enhance the insulation and soundproofing of windows, but they achieve this in different ways and have distinct advantages and drawbacks.
Secondary glazing
Secondary glazing involves adding an extra glass or clear acrylic pane inside an existing window, which creates an air gap, providing insulation and reducing noise transmission.
Double glazing
Double glazing consists of two panes of glass in a sealed unit with a gap of air or inert gas, such as argon, between them. This gap provides the insulating barrier.
When should you replace your windows?
Replacing windows can be a significant investment, so it is essential to know when it’s the right time. There are several factors to look out for:
- Decreased energy efficiency: If you notice a draft, increased energy bills, or feel cold spots near windows, it might be time for an upgrade
- Difficulty in operation: Windows that are hard to open, close, or lock are not just an inconvenience but can also be a security risk
- Condensation between panes: If you have double-glazed windows and notice condensation or fogging between the panes, it suggests the seal has failed and the window is no longer insulating effectively
- Visible damage: Over time, windows can deteriorate. Look for signs, such as chipped or rotting frames, broken panes, or water damage. Sometimes, minor damages can be repaired, but extensive damage usually warrants a replacement
- Plan to sell: If you’re considering selling your home in the near future, new windows can increase its market value and appeal to potential buyers, especially if the current windows are noticeably old or dysfunctional.
What other factors can contribute to the cost of windows?
Excluding frame material, style, and the number of windows, several other factors can influence the cost of new windows. These include:
- Energy efficiency ratings: Windows with higher energy efficiency ratings will typically have a higher upfront cost but can save money in the long run through reduced energy bills
- Type of glass: Options such as low-E glass, coatings, tempered or laminated glass can all add to the cost
- Customisation: Custom sizes or shapes, special finishes, and unique colours will generally be pricier than standard options
- Hardware and accessories: High-quality locks, handles, and other hardware can increase costs, as can incorporating features such as built-in blinds
- Disposal of old windows: Some companies charge for the removal and disposal of old windows
- Installation complexity: A straightforward replacement is typically less costly than an installation that requires structural alterations. Installing on upper floors or in hard-to-reach areas can also increase labour costs.
What to look for in a quote for new windows
When receiving a quote for new windows from double glazing companies, it should be comprehensive and clear to avoid any misunderstandings or unexpected costs later. You should also ensure that when requesting quotes, they are like-for-like comparisons.
A well-detailed window quote should include:
- Detailed breakdown: A clear itemisation of every product and service included, such as individual window costs, installation fees, and any additional services
- Window specifications: The glass, style, dimensions, frame material, and colour should be listed. Your chosen hardware and accessories should also be included
- Installation costs: Clearly stated, either as a total or broken down by individual tasks, such as old window removal, new window installation, and finishing
- Disposal costs: Cost for removing and disposing of old windows, if applicable
- Additional services: Any services beyond standard installation, such as painting or finishing, repairing any damage to surrounding areas, or sealing gaps
- Timeline: An estimated start and completion date for the job
- Payment terms: Clear terms regarding deposit amount, balance due, acceptable payment methods, and any potential finance options or instalment plans
- Warranty: Details on the warranty for both the windows and installation. This should specify the duration, coverage – parts, labour, etc. – and any actions that might void the warranty
- Total cost: A clear statement of the total windows cost, including any taxes or additional fees
- Potential additional costs: Any situations or scenarios that could result in added costs should be noted. For example, how will unforeseen structural issues during installation be handled and billed?
- Terms and conditions: Any specific terms, conditions, or policies related to the job, especially regarding cancellations, changes, or damages
- Expiration date: Many quotes are time-limited, so an expiration date will inform you how long the stated price is valid.
Tips for measuring your windows
Accuracy is essential when measuring windows, whether installing new windows, replacing old ones, or ordering window treatments, such as curtains or blinds.
You’ll need:
- Tape measure, preferably a metal one for accuracy
- Notepad and pen
- Straight edge or ruler (optional)
- Ladder or step stool if necessary
1. Measure the width
- Measure the window’s width at three locations – the top, middle, and bottom
- To do this, place the tape measure from the left side of the window frame to the right side
- Record each measurement, noting the location
- The smallest of these three measurements is the one you’ll use as the window’s width to ensure the best fit
2. Measure the height
- Measure the window’s height at three locations – the left side, centre, and right side
- Start from the top of the sill (the bottom horizontal piece) to the top of the window frame
- Again, record each measurement and its location
- Use the smallest of these three measurements as the window’s height
3. Measure the depth
- Place the tape measure at the outside of the window frame and measure inward to the window stop (a strip of trim that holds the window in place)
4. Measure the window diagonal – optional but useful for square checking
- Measure from the top-left corner of the window frame to the bottom-right corner. Then, measure from the top-right corner to the bottom-left corner
- The two diagonal measurements should be approximately the same. If there’s a significant difference, the window frame may not be square, which can be crucial information if ordering a replacement
5. Measure the window sill projection
- If you’re measuring for window treatments or need to know how far the sill extends from the wall, measure the distance from the wall’s surface to the outer edge of the window sill
Additional tips
- Always record measurements in width x height format. For instance, a window that’s 24 inches wide and 36 inches tall is written as 24″ x 36″
- If you’re ordering window treatments, such as blinds or curtains, additional measurements might be necessary depending on the style and mounting preferences.
Conclusion
The typical UK homeowner spends between £1,200 and £3,000 on new windows, with much of the cost hinging on the chosen window style, frame material, and installation company. However, it’s crucial to strike a balance between cost and the benefits gained by your choices. For the best outcome, comparing quotes from at least three different windows companies is advisable before considering your options.
Windows prices FAQs
Whether it’s worth investing in new windows depends on your unique circumstances. However, if you’ve noticed an increase in your heating bills or more condensation on your windows, it’s definitely worth considering replacing them. New windows will help save money on your energy bills and create a warmer environment in your home during the winter, meaning you could recoup the cost of the windows over time. They’ll also likely increase the kerb appeal and value of your home if you’re considering selling, as potential buyers might be attracted to the idea of buying a house with new windows.
Increasing costs of raw materials, heightened production expenses, and growing demand are driving up glass prices. As a result, window installation companies face higher expenses for the same quantity of glass, directly affecting their profit margins.
Negotiating with window companies is quite common, and many companies expect a certain level of haggling and might even offer initial quotes with some room built in for this purpose. Other companies offer discounts for various reasons – for example, off-season installation, bulk orders, or promotional periods, so it’s always worth asking.
For an average three-bedroom property, new windows can cost the homeowner around £4,000. However, the actual price depends on many factors. The window design, frame material, and size are all considerations, as are the installation costs, which can vary depending on where you live.
Being in an area with a large labour force can help reduce installation costs. Additionally, if a supplier is located nearby, they may have minimal transportation expenses for your project.
Katharine brings over a decade of writing and research expertise, collaborating with some of the UK’s top organisations, such as the Independent, the Federation of Master Builders, Architectural Digest, and Cuvva Car Insurance. Her areas of specialisation include renewable energy, advanced technologies, and various aspects of home improvement, like kitchen renovations, combi boilers, and double glazed windows.
