Secondary Glazing in W1: Mayfair / Marylebone Noise Reduction
Homes in Mayfair / Marylebone typically deal with West End nightlife & delivery noise. We install acoustic secondary glazing tuned for exactly that frequency profile — with a free survey, before/after dB measurement, and full listed-building compliance across Westminster.
Noise profile
Late-night noise & voices — West End nightlife & delivery noise.
Recommended spec
8.8mm acoustic laminate with 150mm cavity.
Expected result
35–42 dB reduction on voices & mid-frequency noise.
Local pages for Mayfair / Marylebone
Pricing and glass specification tuned to Mayfair / Marylebone sash-window installs.
Street examples, measured dB data and pricing across Westminster.
Deep dive on west end nightlife & delivery noise and the glass specs that solve it.
Free 2026 PDF handbook covering acoustic physics, glass specs and London pricing.
W1 FAQs
How much noise reduction can I expect in W1?
Homes in Mayfair / Marylebone typically see 35–42 dB reduction on voices & mid-frequency noise, depending on window size, façade condition and glass specification. We measure before and after with a calibrated sound-level meter as part of every install.
What glass specification is best for Mayfair / Marylebone?
For the dominant noise here (West End nightlife & delivery noise), we recommend 8.8mm acoustic laminate with 150mm cavity. In listed buildings or conservation areas we use the same acoustic performance in a discreet slimline frame that satisfies planners.
Do I need planning permission in Westminster?
Secondary glazing is internal work and is almost never controlled by planning permission — even in conservation areas. Grade II listed buildings need Listed Building Consent, which we handle with drawings and a heritage statement as part of the quote.
How much does a typical W1 install cost?
London prices in 2026 start at £450 per window for a small sash and rise to £1,600 for large Georgian sashes with premium acoustic glass. A three-bed Mayfair / Marylebone flat is usually £3,200–£6,500 fully installed.
Ready for a W1 survey?
Free acoustic survey, before/after dB measurement and a fixed quote inside a week.
Book my free W1 survey