If your windows are old, damaged, or inefficient, replacing them can improve insulation, enhance security, and reduce energy bills. But how much does it cost to install replacement windows in the UK?
The replacement windows cost varies depending on window style, frame material, glazing type, and installation fees. In this guide, we’ll break down the average costs and help you find the best deal for your budget.
1. Average Replacement Windows Cost in the UK
The table below shows the typical price range for replacement windows, based on standard sizes and materials:
Average Cost Per Window (Including Installation)
- uPVC Windows: £250 – £750 per window
- Aluminium Windows: £500 – £1,200 per window
- Timber Windows: £700 – £2,000 per window
- Composite Windows: £800 – £2,500 per window
For a full-house window replacement, the total cost varies based on the number of windows:
- Small Flat (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+
The final price will depend on customisations, energy efficiency ratings, and additional installation costs.
2. Factors That Affect Replacement Windows Cost
The cost of replacement windows depends on multiple factors, including:
Window Style & Type
- Casement Windows – £300 – £600 per window
- Sash Windows – £600 – £1,200 per window
- Tilt & Turn Windows – £500 – £900 per window
- Bay Windows – £1,500 – £3,000 per window
Larger or custom-shaped windows tend to be more expensive than standard styles.
Frame Material
- uPVC – The most affordable and low-maintenance option
- Aluminium – Sleek, durable, but higher in price
- Timber – Aesthetically pleasing but requires maintenance
- Composite – A mix of materials for durability and efficiency
Choosing uPVC over timber or aluminium can reduce costs significantly.
Glazing Type & Energy Efficiency
- Double Glazing – Standard option, costing £300 – £900 per window
- Triple Glazing – Better insulation but more expensive, costing £600 – £1,500 per window
- Low-E Glass – Reflects heat inside, adding £50 – £100 per window
- Acoustic or Laminated Glass – Improves soundproofing, adding £100 – £400 per window
For the best long-term savings, investing in A-rated double glazing or triple glazing is recommended.
Installation & Labour Costs
- Standard Window Installation: £150 – £400 per window
- Complex Installations (e.g., bay windows, structural changes): Higher labour costs
- Scaffolding Costs (for upper floors): £300 – £600 extra
Choosing a local window company can sometimes reduce labour costs compared to national firms.
3. Additional Costs & Optional Upgrades
If you want extra features, expect the total replacement windows cost to increase:
- Coloured or Woodgrain Frames: +£100 – £300 per window
- Integral Blinds (Built-In): +£200 – £500 per window
- Security Features (Multi-Locking Systems): +£50 – £200 per window
- Self-Cleaning or Solar-Control Glass: +£100 – £400 per window
While these extras increase upfront costs, they can enhance home security, reduce maintenance, and improve efficiency.
4. How to Save Money on Replacement Windows Cost
If you’re looking to reduce the replacement windows cost, follow these tips:
- Compare Multiple Quotes – Always get at least 3 quotes from different companies.
- Buy in Bulk – Replacing multiple windows at once often qualifies for discounts.
- Choose Standard Sizes – Custom shapes and sizes are more expensive.
- Look for Energy Efficiency Grants – Some government schemes help cover costs.
- Opt for uPVC – The most budget-friendly and durable option.
Investing in energy-efficient windows can lower your heating bills, making up for the initial investment over time.
5. Are Replacement Windows Worth the Cost?
Yes! Replacing old windows offers multiple benefits:
- Lower energy bills – Double or triple glazing reduces heat loss.
- Increased home value – A-rated energy-efficient windows make properties more attractive to buyers.
- Better home security – Modern locking systems offer superior protection.
- Improved comfort – No more draughts, condensation, or noisy traffic.
If your windows are over 15-20 years old, investing in replacement windows can pay off in both comfort and cost savings.
Get a Free Quote for Replacement Windows with Cove Glass
At Cove Glass, we provide high-quality, energy-efficient replacement windows at competitive prices. Whether you need double glazing, triple glazing, or bespoke designs, our team offers expert installation and professional service.
📞 Call us: 01252 318787
📧 Email us: sales@coveglass.co.uk
🔗 Learn more: Replacement Windows Cost & Installation
Replacement Windows Cost FAQs
Q1: What is the cheapest type of replacement window?
A1: uPVC casement windows are the most affordable, starting at £250 – £750 per window.
Q2: Is triple glazing worth the extra cost?
A2: If you live in a cold area or near a busy road, triple glazing improves insulation and noise reduction, making it a good long-term investment.
Q3: How long do replacement windows last?
A3: High-quality double glazing lasts 20-30 years, depending on materials and maintenance.
