Upgrading your windows is one of the smartest investments you can make in your home. Not only does double glazing improve your property’s energy efficiency, but it also enhances security, reduces outside noise, and increases the overall value of your home.
If you live in Hampshire, Surrey, West Sussex, Dorset, Wiltshire, Berkshire, or London, understanding the cost of double glazing in 2026 is key to budgeting for this important home improvement project. In this guide, we’ll break down costs, explain factors that affect pricing, explore popular window types, and provide tips for getting the best value from your installer so how much does double glazing cost in hampshire & surrounding counties .
Why Double Glazing Is Worth the Investment
Old or single-glazed windows can be a major drain on energy efficiency. Heat escapes easily in winter, and your home can overheat during the summer months. This leads to:
Higher energy bills
Reduced comfort
Increased noise from outside
Modern double glazing addresses these issues and comes with several key benefits:
Lower Heating Bills – Energy-efficient windows help retain heat in winter.
Enhanced Comfort – Homes stay warmer in winter and cooler in summer.
Noise Reduction – Ideal for busy urban areas like London or coastal towns in Dorset.
Improved Security – Reinforced frames and multi-point locks keep your home safe.
Increased Property Value – New windows boost kerb appeal and make your property more attractive to buyers.
Reduced Condensation – Modern windows prevent mould and damp caused by excess condensation.
For homeowners in the South of England, double glazing is not just an upgrade — it’s a long-term investment in comfort, safety, and savings.
Factors That Affect Double Glazing Costs
The cost of double glazing depends on several variables. Here’s what you need to consider:
1. Window Material
Different materials vary in cost and performance:
uPVC Windows – Affordable, low-maintenance, and energy-efficient.
Aluminium Windows – Sleek, modern, and highly durable, usually more expensive than uPVC.
Timber Windows – Traditional appearance for period homes, more expensive due to maintenance needs.
Composite Windows – Blend of materials offering durability, insulation, and aesthetics.
2. Window Style
Opening style affects the price:
Casement Windows – Simple, common, and cost-effective.
Sliding Sash Windows – Traditional design, often higher cost.
Tilt-and-Turn Windows – Modern functionality, often mid-range cost.
Bay Windows – Popular in period homes, can be pricier due to size and structure.
3. Glass Type
The glass itself plays a role in cost:
Double Glazing – Standard two-layer glass with gas fill.
Triple Glazing – Three layers for maximum insulation, higher cost.
Low-E Coatings – Reflect heat back into your home for improved energy efficiency.
Laminated or Toughened Glass – Adds security and safety, slightly increases price.
4. Number of Windows
Naturally, more windows mean higher costs. A single window replacement is straightforward, but a full-house upgrade can run into several thousand pounds.
5. Installation Complexity
Factors affecting installation cost:
Access difficulty (e.g., upper floors or hard-to-reach areas)
Size and shape of the window openings
Property type (modern home vs period property)
Removal of old frames
6. Location
Prices vary across regions. For example:
London and Surrey – Labour costs higher, so window installation is more expensive.
Hampshire, Dorset, Wiltshire – Typically slightly lower prices, but still competitive.
West Sussex and Berkshire – Mid-range costs, depending on town and installer availability.
Typical Double Glazing Costs (2026)
Here’s a breakdown of typical prices for homes in Hampshire and surrounding counties:
| Window Type | Average Installed Cost (UK) |
|---|---|
| Standard uPVC Window | £350 – £650 |
| Aluminium Window | £600 – £1,200 |
| Timber Window | £800 – £1,500 |
| Sliding Patio Door | £1,200 – £2,200+ |
| French Doors | £1,000 – £1,800 |
| Bay Window | £1,200 – £2,500+ |
| Full Home Replacement | £5,000 – £15,000+ |
| Triple Glazing | +£200 – £400 per window |
Note: These prices include professional installation and materials. VAT may apply in some regions.
Regional Price Differences
Hampshire – Full house replacement: £5,000 – £12,000
Surrey – Full house replacement: £6,000 – £14,000
West Sussex – Full house replacement: £5,500 – £12,500
Dorset – Full house replacement: £5,000 – £12,000
Wiltshire – Full house replacement: £5,000 – £12,000
Berkshire – Full house replacement: £5,500 – £13,000
London – Full house replacement: £7,000 – £15,000
London tends to be the highest due to labour costs, while rural Dorset or Wiltshire may be slightly cheaper.
Ways to Save on Double Glazing
Even with the benefits, homeowners want to get the best value. Here’s how to save money without compromising quality:
Compare Multiple Quotes – Always get at least three quotes from local installers.
Check for Packages – Some companies offer discounts for full-home replacements.
Ask About Promotions – Seasonal or mid-year discounts may apply.
Choose Standard Sizes – Custom windows cost more; standard sizes save money.
Check Warranty Offers – Longer warranties often indicate higher quality materials and installation.
Plan in Advance – Avoid emergency replacements, as they often cost more.
Popular Window Styles & Costs
Here’s a closer look at styles and typical 2026 pricing:
uPVC Windows
Average Cost: £350 – £650
Best For: Low maintenance, budget-conscious homeowners
Features: Energy-efficient, easy to clean, long-lasting
Aluminium Windows
Average Cost: £600 – £1,200
Best For: Modern homes, large windows, minimal frame design
Features: Durable, corrosion-resistant, stylish finish
Timber Windows
Average Cost: £800 – £1,500
Best For: Period homes, traditional appearance
Features: Natural aesthetics, long-term performance with proper maintenance
Triple Glazing
Average Cost: +£200 – £400 per window
Best For: Extreme energy efficiency, noise reduction, London city noise
Features: Three glass layers with gas fill, maximum insulation
Sliding & French Doors
Sliding Doors: £1,200 – £2,200+
French Doors: £1,000 – £1,800+
Features: Open-plan living, access to gardens, improved insulation
Factors That Affect London vs County Costs
If you live in London, expect higher labour rates and potentially higher material costs. Inner London homes may also face access difficulties (narrow streets, scaffolding permits), which can add to installation costs.
For Hampshire, Dorset, Wiltshire, Berkshire, Surrey, and West Sussex, installers are plentiful, so competitive quotes can save you money. Towns like Portsmouth, Southampton, Guildford, Chichester, Reading, and Salisbury are great examples of areas with competitive local pricing.
The Importance of Choosing a Trusted Installer
When investing thousands of pounds in new windows, quality installation is critical. Poorly installed double glazing can lead to:
Heat loss
Draughts
Condensation
Security risks
What to Look for in an Installer
FENSA or CERTASS Registration – Legal compliance and standards
Insurance-backed Guarantees – Protects your investment
Customer Reviews & Testimonials – Google, Trustpilot, or local forums
Clear Written Quotes – Avoid hidden costs
Tip: Always ask for previous project photos and references in your town or county.
Benefits of Professional Installation
Professional installation ensures your windows:
Fit perfectly
Achieve maximum energy efficiency
Are secure and weatherproof
Come with warranty protection
Installing double glazing is not just about the windows — it’s about the installation expertise.
How to Budget for Double Glazing in 2026
Decide the number of windows or doors you want to replace.
Choose frame material based on budget and style.
Consider glass type — standard double glazing vs. triple glazing.
Factor in installation costs, including scaffolding if needed.
Collect multiple quotes from local installers.
For a typical 3-bedroom house in Hampshire, expect:
uPVC Windows Only: £5,000 – £8,000
Aluminium Windows: £6,500 – £10,000
Full Triple Glazing Upgrade: £8,000 – £12,000+
Comparing Quotes Across Surrounding Counties
Because prices vary by county:
Hampshire & West Sussex – Mid-range installers, lots of competition
Dorset & Wiltshire – Slightly lower costs, rural properties may need bespoke work
Surrey & Berkshire – Higher prices for premium quality
London – Highest costs, but access to premium installers
Additional Tips to Reduce Costs
Replace all windows at once to save on labour
Consider standard sizes to avoid custom costs
Ask about energy efficiency grants or incentives (check government schemes)
Plan for off-peak installation dates to negotiate discounts
Frequently Asked Questions (FAQs)
Q1: How long does double glazing last?
A1: Typically 20–30 years with proper maintenance. Triple glazing can last longer.
Q2: Does double glazing really save on energy bills?
A2: Yes, homeowners often see 15–25% reduction in heating costs.
Q3: Can I replace just a single window?
A3: Yes, but replacing multiple windows is more cost-effective long-term.
Q4: Do I need planning permission?
A4: Usually not for residential properties, but check for listed buildings or conservation areas.
Final Thoughts
Double glazing is a long-term investment that improves comfort, security, and property value. Costs vary based on material, style, number of windows, installation complexity, and location.
For homeowners in Hampshire, Surrey, West Sussex, Dorset, Wiltshire, Berkshire, or London, getting multiple quotes from vetted installers is the best way to ensure you get quality windows at a fair price.
By planning ahead, choosing the right materials, and working with trusted installers, you can enjoy a warmer, quieter, and more secure home for years to come.
If you’re ready to upgrade your windows, get free, no-obligation double glazing quotes today. Our trusted local installers across Hampshire, Surrey, West Sussex, Dorset, Wiltshire, Berkshire, and London will provide clear pricing, professional installation, and expert advice to help you make the right choice.
Image provided by Photo by Emily Wang on Unsplash
