The Honest 2026 Price Range
For a standard double glazed sealed unit replacement in 2026, expect to pay between £85 and £180 per unit fitted, depending on size and specification. Anything significantly higher usually means you're paying for sales overheads, not better glass.
Typical Prices by Window Size
| Unit size | Specification | Typical price (fitted) |
|---|---|---|
| Small (up to 0.4m²) | Standard 4-20-4 argon, Low-E | £85 - £110 |
| Medium (0.4-1.0m²) | Standard 4-20-4 argon, Low-E | £110 - £150 |
| Large (1.0-2.0m²) | Standard 4-20-4 argon, Low-E | £150 - £220 |
| Bay window pane | Often shaped or stepped | £140 - £260 |
| Toughened safety glass | Required near floor or doors | +£30 - £60 |
| Obscure / patterned | Bathroom privacy | +£15 - £30 |
What Drives the Price Up
- Size - bigger glass uses more material and needs two fitters
- Toughened or laminated safety glass - required by Building Regs in certain locations
- Acoustic glass - useful near busy roads or flight paths
- Decorative glass - leaded, Georgian bars, stained glass
- Access - upper-floor or bay windows may need extra labour
Why Some Quotes Are Eye-Watering
National brands often quote £400-£800 per unit. That's not the cost of the glass - it's their advertising, commission and showroom overheads. A local specialist (us included) buys from the same UK manufacturers and fits with the same skill, but without the sales machine bolted on top.
How to Get the Best Price
- Get all blown units replaced together - one call-out fee, not five
- Ask for the spec in writing (gas fill, Low-E coating, warm-edge spacer)
- Insist on a written 25-year sealed-unit guarantee
- Avoid anyone who won't quote without a "home consultation"
For a no-obligation quote on your specific windows in Essex or East London, give us a measurement and we'll give you a price the same day.