UK glazing calculator

Window Replacement Cost Calculator

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

Window type

Number of windows

UK region

Triple glazing?

Scaffolding / difficult access?

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