Replacing windows is a significant investment, but the cost to replace windows varies based on several factors. From the type of glass and frame materials to the number of windows and installation fees, understanding what influences pricing can help you budget effectively.
In this guide, we break down the key factors that determine the cost to replace windows and provide insights into making the best choice for your home.
1. Window Type & Style
The design and functionality of the window greatly impact the cost to replace windows. Some styles are more expensive due to their size, complexity, or additional features.
- Casement Windows – One of the most affordable and common types, typically ranging from £300 – £600 per window.
- Sash Windows – Traditional sliding windows, often used in period homes, with prices starting from £600 – £1,200 per window.
- Tilt & Turn Windows – Feature a dual-opening mechanism, costing between £500 – £900 per window.
- Bay & Bow Windows – Require multiple panels, increasing costs to £1,500 – £3,000 per unit.
Larger or custom-designed windows will cost more due to additional materials and installation complexity.
2. Frame Material Choices
The frame material affects not only the cost to replace windows but also durability, insulation, and maintenance requirements.
- uPVC Windows – The most budget-friendly option, ranging from £250 – £750 per window.
- Aluminium Windows – Sleek, modern, and durable but more expensive, costing £500 – £1,200 per window.
- Timber Windows – Traditional and aesthetically appealing but require more maintenance, with prices starting at £700 – £2,000 per window.
- Composite Windows – A combination of materials for enhanced insulation and durability, costing £800 – £2,500 per window.
3. Glass Type & Energy Efficiency
The type of glazing plays a significant role in pricing, affecting insulation, noise reduction, and security.
- Double Glazing – Standard for most homes, offering good insulation and costing between £300 – £900 per window.
- Triple Glazing – Provides superior energy efficiency and noise reduction but costs more, typically £600 – £1,500 per window.
- Low-E (Low-Emissivity) Glass – Reflects heat back into the home, reducing energy bills and adding £50 – £100 per window.
- Laminated or Toughened Glass – Improves security and safety, adding £100 – £300 per window.
- Self-Cleaning or Solar-Control Glass – Reduces maintenance and overheating in sunny rooms, increasing costs by £100 – £400 per window.
4. Number of Windows & Property Size
The more windows you replace, the higher the overall cost, but many companies offer discounts for multiple installations.
- Small Flats (4-6 windows) – £2,000 – £5,000
- Semi-Detached House (8-10 windows) – £4,000 – £8,000
- Detached House (10-15 windows) – £6,000 – £15,000+
If you’re replacing all windows at once, you may be eligible for bulk discounts from window suppliers.
5. Installation & Labour Costs
Professional installation ensures your windows are fitted correctly for maximum energy efficiency and durability. Labour costs vary depending on:
- The complexity of the installation (e.g., sash windows require more time)
- The number of workers required
- Any structural modifications needed
On average, professional window installation costs range from £150 – £400 per window. Some companies include labour in their quotes, while others charge separately.
6. Location & Supplier Differences
Where you live can influence window replacement costs due to regional price variations.
- London & South East – Higher labour and material costs
- Midlands & North England – Slightly lower prices compared to the South
- Scotland & Wales – Can vary, with rural areas having higher transport fees
Choosing a local supplier can sometimes reduce costs, as national companies may charge extra for transportation.
7. Additional Features & Customisation
Upgrades and extras can increase costs but may add long-term benefits.
- Coloured or Woodgrain Finishes – Custom finishes add £100 – £300 per window.
- Integrated Blinds – Built-in blinds for privacy and light control cost an extra £200 – £500 per window.
- Acoustic Glass – Reduces noise pollution, adding £150 – £400 per window.
- Smart Windows – Windows with automated or remote-control functions can cost £1,000+ per window.
If security is a concern, investing in multi-point locking systems and reinforced frames can also add to the total cost.
How to Save on the Cost to Replace Windows
If you’re looking to reduce the cost to replace windows, consider these tips:
- Compare Multiple Quotes – Get at least three quotes from different window companies.
- Look for Energy-Efficiency Grants – Some government schemes may help offset costs.
- Replace Windows in Bulk – Many companies offer discounts for replacing multiple windows.
- Choose uPVC Over Timber or Aluminium – More affordable and low-maintenance.
- Opt for Standard Sizes – Custom shapes or sizes increase costs.
Get a Free Quote for Window Replacement with Cove Glass
At Cove Glass, we offer competitive pricing on window replacements with high-quality materials, expert installation, and energy-efficient options. Contact us today for a free, no-obligation quote and find the best solution for your home.
📞 Call us: 01252 318787
📧 Email us: sales@coveglass.co.uk
🔗 Learn more: Window Replacement Services
Cost to Replace Windows FAQs
Q1: How much does it cost to replace windows all around a house?
A1: For an average 3-bedroom home, expect to pay between £4,000 – £8,000 depending on window type, glazing, and materials.
Q2: What is the cost to replace windows in winter?
A2: Some companies offer winter discounts due to lower demand, so it can be a good time to get a better deal.
Q3: How long does window replacement take?
A3: Most standard window replacements take 1-2 hours per window, while a full-house replacement can take 2-5 days.