2026 London Pricing
Sash Window Secondary Glazing Cost & ROI Calculator
Get an instant, transparent estimate for your London sash windows. Real pricing based on glass specification, frame finish, and postcode.
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Project Summary
Estimated Total
£5,712–£7,623
£952–£1,270 per window · 6 windows · Fully installed
Window typeVertical Slider
Glass10.8mm Acoustic Laminate
LocationInner London
The Silence Factor
Noise reductionUp to 45 dB
70% quieter
Investment Comparison
Secondary Glazing£7,623
Save 53%
Full Sash Replacement£16,200+
£2,700+ per window
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Included in Every Quote
Professional Survey
10.8mm Acoustic Glass
Slimline Aluminium Frames
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Exact costs depend on dimensions, access requirements, and borough-specific planning requirements. All prices include VAT.