How much does it cost to replace all windows in a 3-bedroom house?

A typical 3-bed semi-detached home has 8–12 windows. uPVC double glazing costs £3,500–£7,000 for a full replacement.

How long do double glazed windows last?

Quality double glazed windows last 20–35 years. If you see condensation between the panes, the seal has failed and the unit needs replacing.

Is triple glazing worth it?

Triple glazing adds £80–£150 per window but improves sound insulation and U-values. It's most cost-effective in very cold climates or noisy locations.

How Much Does Window Replacement Cost?

Estimate window replacement costs based on number of windows, glazing type, and frame material.

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Factors that affect cost

Number of windows and their sizes — bay windows cost more than standard casements
Frame material — timber and aluminium cost significantly more than uPVC
Glazing specification — triple glazing adds 20–30% over double
Installation complexity — first-floor windows may need scaffolding

💡 Money-saving tips

1.uPVC offers the best value — it's low maintenance and has excellent thermal performance
2.Replace all windows at once for a better price per unit
3.Look for FENSA or CERTASS registered installers (UK) — they self-certify building regs compliance
4.Check Energy Performance Certificate ratings — A-rated windows save on heating bills

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