If you’re considering double glazing, it’s important to understand the costs involved. Double glazing improves energy efficiency, enhances security, and reduces noise. Prices vary based on window type, materials, and installation factors. Below is a breakdown of expected costs in 2025.
Average Costs by Window Type
| Window Type | Price Range (Per Window) |
| Casement Windows | £500 – £1,250 |
| Sash Windows | £700 – £1,500 |
| Sliding Windows | £600 – £1,400 |
| Tilt and turn | £600 – £1,400 |
| Bay Windows | £1,100 – £4,000 |
| Bow Windows | £1,500 – £5,000+ |
Cost for a 3-Bedroom House
For a home with 8-12 windows, double glazing costs between £8,000 and £15,000. The price depends on the number of windows, their size, and the chosen material. Opting for uPVC windows can be a cost-effective choice, offering durability and energy efficiency.
Material Costs
The frame material impacts cost significantly:
| Number of Windows | uPVC (£) | Aluminium (£) | Wood (£) |
| 4 to 6 | 2,320 – 3,480 | 3,120 – 3,480 | 3,480 – 5,220 |
| 8 to 10 | 4,640 – 5,800 | 6,240 – 7,800 | 6,960 – 8,700 |
| 12 to 14 | 6,960 – 8,120 | 9,360 – 10,920 | 10,440 – 12,180 |
| 16 to 18 | 9,280 – 10,440 | 12,480 – 14,040 | 13,920 – 15,660 |
Labour Costs
Labour forms a major part of the expense:
- Daily rate for two installers: £600 per day
- Hourly rate per installer: £25 – £35
Labour costs vary by region, with higher prices in London and the South East. Getting multiple quotes from local installers ensures better value.
Types of Double Glazed Windows
Your choice affects both cost and function:
- Casement Windows(£500 – £1,250): Side-hinged, open outward, cost-effective.
- Sash Windows(£700 – £1,500): Vertical sliding, traditional, higher due to complex mechanisms.
- Sliding Windows(£600 – £1,400): Horizontal movement, modern style, smooth operation.
- Tilt and Turn Windows(£600 – £1,400): Tilt for ventilation or open fully for cleaning.
- Bay Windows(£1,100 – £4,000): Extended design, more materials required.
- Bow Windows(£1,500 – £5,000+): Rounded, panoramic, premium pricing due to craftsmanship.
Factors Influencing Costs
- Window Size: Larger windows require more materials and labour.
- Energy Ratings: Higher-rated windows Clactoncost more but lower energy bills.
- Glazing Options: Extra layers or coatings increase price.
- Custom Features: Decorative frames and unique shapes add cost.
Saving Money on Double Glazing
- Get Multiple Quotes: Compare at least three installers.
- Choose Standard Designs: Custom options raise costs.
- Upgrade Gradually: Replace essential windows first.
- Opt for uPVC: Most affordable and efficient material.
- Time Your Purchase: Off-season discounts available in late autumn or winter.
Making an Informed Decision
Knowing the costs helps you budget effectively. Whether focusing on aesthetics, energy savings, or affordability, being aware of pricing and installation factors ensures a smart investment. Double glazing offers lower energy bills, improved comfort, and better security. Plan carefully to get the best value for your money.