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Soundproof Window Specialists London | Acoustic Secondary Glazing

Reclaim Your Peace.

London's leading soundproof secondary glazing specialists. Our 10.8mm acoustic laminate glass delivers up to 54dB noise reduction — the highest available for residential properties. Heritage and listed building window specialists serving Belgravia, Chelsea, Richmond, Hampstead, Notting Hill, Mayfair, and all London boroughs. Free noise survey. Prices from £350 per window. No planning permission required.

We are London's trusted listed building secondary glazing installers. Whether you face traffic noise from the A316, Heathrow flight path disturbance, or nightlife noise in Portobello Road, our bespoke acoustic solutions — fully compliant with conservation area requirements — transform your home into a sanctuary of silence. Westminster enforcement alone won't fix your noise problem. Properly specified secondary glazing will.

Start Your Silent Journey →

    Secondary Glazing Cost Calculator

    Use our estimator to get an indicative price for secondary glazing your heritage property — and see how it compares to full window replacement.

    Heritage Cost Estimator

    Secondary Glazing Investment

    Get a ballpark figure in seconds — no commitment required.

    Window Type
    Primary Goal
    Glass Thickness
    Number of Windows
    4

    Estimated Investment

    £2,662 – £3,602

    ~£783 per window · inc. fitting

    Save vs. Heritage Window Replacement

    Replacing 4 heritage windows with double glazing typically costs £14,000+. Secondary glazing saves you an estimated £10,398 — and requires no planning permission.

    • No planning permission needed
    • Reversible & heritage-safe
    • Up to 80% noise reduction
    • Improves EPC rating
    Get a Precision Quote

    Estimates are indicative. Final pricing depends on site survey, frame condition, and access.

    Instant Estimates

    Get a ballpark investment range in seconds based on your window type, glass choice, and property size.

    Heritage Friendly

    Secondary glazing is reversible and internal — no planning permission required for listed buildings.

    Save vs. Replacement

    Typically 60-70% cheaper than full heritage window replacement, with equal or better acoustic performance.

    Ready for a Precise Figure?

    Our free site survey accounts for frame condition, access, and your exact noise profile to deliver a guaranteed quote.

    Book Free Survey