City of Westminster · London
Secondary Glazing & Windows in Westminster
Belgravia's Regency squares, Marylebone's mansion blocks and the stucco terraces of Pimlico and Maida Vale give Westminster a townscape that is protected at almost every turn. We keep its historic windows exactly as they are while making its homes warm and quiet.
- FENSA
- Which?
- CERTASS
- TrustMark
Your local specialist in Westminster
The City of Westminster contains some of the most architecturally protected streets in the world, from John Nash's Regency terraces to the grand garden squares of Belgravia and the redbrick mansion blocks of Marylebone. The overwhelming majority of homes sit within a conservation area, and a great many are listed.
For owners here, replacing windows is usually out of the question — but secondary glazing offers a fully reversible way to cut heat loss, silence traffic and improve security without touching the original joinery. It's the discreet upgrade that keeps both English Heritage and Westminster's planners content.
Where a property allows it, we also install refined timber and aluminium windows and elegant doors, always specified to sit comfortably within Westminster's distinguished streetscapes.
Neighbourhoods & postcodes we cover
Westminster architecture
Matched to how Westminster was built
We tailor every installation to the period homes that define Westminster.
Regency stucco terraces
Belgravia and Pimlico's cream-painted terraces have grand, tall sashes. Bespoke vertical sliding units preserve the rhythm of the glazing bars while adding warmth and quiet.
Mansion blocks
Marylebone and Maida Vale's red-brick and Portland-stone mansion flats respond superbly to acoustic glazing, which tames the noise of the surrounding arterial roads.
Garden-square houses
The stately houses around Belgrave and Eaton squares gain comfort from full-height secondary glazing that leaves shutters and cornicing untouched.
Conservation & listed homes
Upgrades that respect Westminster's planning rules
Almost all of Westminster is designated conservation area, with dense concentrations of listed buildings in Belgravia, Mayfair and Marylebone. Secondary glazing's reversible, internal nature means it usually avoids planning permission and is welcomed by the City of Westminster's conservation team.
Up to 75%
less heat loss through your original windows
Up to 80%
less traffic, rail and aircraft noise
Since 1973
family-run, FENSA-registered and fully guaranteed
Recent local work
Projects across Westminster
A snapshot of the kind of homes we help across the borough.
Belgravia, SW1
Full-height acoustic units for a Grade II* listed Regency terrace
Marylebone, W1
Discreet glazing to a red-brick mansion flat on a busy street
Maida Vale, W9
Slim sliding units to an Edwardian mansion block near the canal
What we install
Our services in Westminster
A complete range of home improvements, expertly fitted and fully guaranteed.
Also in Westminster
Opening up the back of your Westminster home?
We also design and fit made-to-measure aluminium bi-fold doors across Westminster — slim frames, wide spans and year-round warmth for kitchens, extensions and garden rooms.
How it works
From first call to aftercare
- 01
Free Westminster survey
A specialist surveyor visits, measures each window and recommends the right system for the period and planning context.
- 02
Design
We design discreet units matched to your sightlines, with acoustic, thermal or security glass to suit.
- 03
Manufacture
Every panel is made to measure to the exact dimensions of your original windows.
- 04
Installation
Our own fitters install cleanly in a day for most homes, protecting your floors and original windows throughout.
- 05
Aftercare
Your installation is fully guaranteed, with friendly local aftercare whenever you need it.
FAQs
Secondary glazing in Westminster — your questions answered
More London boroughs
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Ready to improve your Westminster home?
Book a free, no-obligation quote today. Friendly advice, honest pricing and no pushy sales.