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UK glazing calculator

Window Replacement Cost Calculator

Estimate double-glazed replacement windows by type and quantity, with regional, triple-glazing and difficult-access allowances.

Estimated replacement-window budget

£4,910 – £12,275

Typical planning estimate £9,820. A typical 3-bed whole-house double-glazing project is commonly around £8,000–£15,000.

Benchmark source: Checkatrade May 2026 double glazing guide. Regional, triple-glazing and access adjustments are UK Home Costs modelling assumptions. See sources →

See the 2026 double-glazing cost for a 3-bed house →

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Window Replacement planning toolBuilt from dated UK benchmarks with modelling assumptions kept separate. Data review: 1 September 2026.