Sash Cost Guide
Victorian and period sash window costs, verified against real UK contractor quotes. Working calculators for repair, replacement, draught proofing and restoration.
Cost Calculators
Repair Cost Calculator
Select repairs needed, get instant estimate. Cords, glass, seals, paint, sills.
Replacement Cost Calculator
Timber or UPVC, standard or custom sizes. Double glazing, Georgian bars.
Draught Proofing Calculator
Brush seals, compression systems. Calculate savings and payback period.
Cost Guides by Topic
Replacement
UPVC vs timber, double glazed sash windows, Georgian and Victorian period costs. £600-£2,200 per window.
Repair
Refurbishment, restoration, box sash repairs. When to repair vs replace. £150-£1,200 per window.
Energy
Draught proofing, double glazing, slim DG retrofit. ECO4 grants and conservation area rules.
Why sash windows cost what they cost
Period sash windows need specialist skills. A Georgian 6-over-6 takes longer to restore than a Victorian 2-over-2. Listed building consent adds surveyor fees. Secondary glazing costs less than full replacement but achieves 80% of the thermal improvement.
All calculator rates verified against Checkatrade/MyBuilder quotes (2026), FENSA-certified installer pricing, and Historic England guidance. Rates date-stamped and updated quarterly.