Areas We Cover
Secondary Glazing Across London's Heritage Boroughs
We install heritage-sensitive secondary glazing across London, covering all 32 boroughs and the City of London with specialist knowledge of each borough's conservation areas, listed buildings and planning requirements. Find your area below to learn how we can help.
Kensington
Secondary Glazing for Kensington's Grand Terraces & Mansion Flats
Chelsea
Bespoke Secondary Glazing for Chelsea's Historic Streets & Riverside Homes
Westminster
Secondary Glazing Specialists Serving Westminster's Georgian & Regency Estates
Islington
Secondary Glazing for Islington's Georgian Terraces & Victorian Streets
Camden
Secondary Glazing for Camden's Regency Squares & Victorian Villas
Hampstead
Secondary Glazing for Hampstead's Historic Village & Arts and Crafts Homes
Richmond
Secondary Glazing for Richmond's Riverside Georgian & Victorian Homes
Greenwich
Secondary Glazing for Greenwich's Maritime Georgian & Victorian Streets
Wandsworth
Secondary Glazing for Wandsworth's Victorian Terraces & Riverside Conversions
Hammersmith & Fulham
Secondary Glazing for Hammersmith & Fulham's Victorian & Riverside Homes
Dulwich
Secondary Glazing for Dulwich's Georgian Village & Victorian Estates
Barking and Dagenham
Secondary Glazing for Barking's Abbey Quarter & the Becontree Estate
Barnet
Secondary Glazing for Hampstead Garden Suburb, Totteridge & Barnet's Metroland Homes
Bexley
Secondary Glazing for Bexley's Village Centres, Arts and Crafts Landmarks & Suburban Homes
Brent
Secondary Glazing for Brent's Edwardian Avenues, Mansion Flats & Stadium-Side Streets
Bromley
Secondary Glazing for Chislehurst, Beckenham & Bromley's Village Conservation Areas
City of London
Secondary Glazing for the City's Barbican Estate, Livery Halls & Historic Residences
Croydon
Secondary Glazing for Croydon's Victorian Suburbs, Edwardian Villas & Tramlink Streets
Ealing
Secondary Glazing for Ealing's Edwardian Avenues, Bedford Park & Heathrow-Affected Homes
Enfield
Secondary Glazing for Enfield Town, Winchmore Hill & the Borough's Village Greens
Hackney
Secondary Glazing for Hackney's Victorian Terraces, Georgian Squares & Warehouse Lofts
Haringey
Secondary Glazing for Highgate, Muswell Hill & Crouch End's Edwardian Streets
Harrow
Secondary Glazing for Harrow on the Hill, Pinner Village & Metroland Semis
Havering
Secondary Glazing for Havering's Village Cores, Edwardian Homes & Gidea Park Garden Suburb
Hillingdon
Secondary Glazing for Hillingdon's Heathrow-Affected Homes, Ruislip Village & Metroland
Hounslow
Secondary Glazing for Chiswick's Georgian Riverside, Bedford Park & Heathrow-Affected Homes
Kingston upon Thames
Secondary Glazing for Kingston's Riverside Town, Surbiton Villas & Coombe Estates
Lambeth
Secondary Glazing for Clapham, Brixton, Stockwell & Lambeth's Georgian Squares
Lewisham
Secondary Glazing for Blackheath, Brockley & Lewisham's Victorian Conservation Areas
Merton
Secondary Glazing for Wimbledon Village, Merton Park & the John Innes Conservation Areas
Newham
Secondary Glazing for Forest Gate's Victorian Terraces, Stratford & City Airport-Affected Homes
Redbridge
Secondary Glazing for Wanstead's Georgian Village, Woodford Green & Redbridge's Edwardian Streets
Southwark
Secondary Glazing for Bermondsey Warehouses, Camberwell's Georgian Streets & Borough
Sutton
Secondary Glazing for Carshalton Village, Cheam & Sutton's Edwardian Suburbs
Tower Hamlets
Secondary Glazing for Spitalfields' Huguenot Houses, Wapping Warehouses & Bow's Victorian Streets
Waltham Forest
Secondary Glazing for Walthamstow Village, Leytonstone & the Warner Estates
Why the borough matters
Secondary glazing is the same principle everywhere: an independent internal frame installed behind your existing window, leaving the original untouched. What changes from one London borough to the next is what you are allowed to do, and what problem you are actually solving.
Each London authority runs its own conservation areas and applies its own interpretation of national listed-building guidance. Two houses on facing sides of the same street can sit under different planning regimes. A Georgian terrace in Islington, a Victorian villa in Dulwich and a mansion block in Westminster each present a different frame depth, sightline and opening mechanism, which is why we survey in person rather than quoting from a window schedule.
Listed buildings and conservation areas
Roughly a fifth of the properties we survey in inner London are either listed or sit within a conservation area. Because secondary glazing is reversible and makes no permanent alteration to the original window, conservation officers generally treat it far more favourably than replacement double glazing. Consent is still required for listed properties, and we prepare the drawings and specifications that support those applications. Our guide to secondary glazing for listed buildings sets out what officers typically look for.
London window types we work with
The capital's period housing stock is dominated by two forms that need quite different treatment. Vertical sliding sashes suit a matching vertical slider so the secondary unit moves the way the original does and the meeting rail stays aligned; see secondary glazing for sash windows. Angled and curved bays need each facet measured and glazed individually, covered in our bay window secondary glazing options. Casements, fanlights and arched heads are all handled as bespoke units.
Noise is the most common reason people call
London noise is rarely generic. Red-route traffic, night buses, Underground surface sections, mainline rail corridors and Heathrow approach paths each produce a different acoustic signature, and the cavity width and glass specification that fixes one will not necessarily fix another. Low-frequency road rumble in particular needs a wider air gap than most installers allow for. Our acoustic window inserts page explains how cavity depth and laminated glass work together.
What it costs, and what we need from you
Price is driven by window size, opening type, glass specification and access rather than by postcode, so a Camden flat and a Richmond townhouse with comparable windows land in a similar range. Our secondary glazing cost guide gives real per-window figures and typical payback periods. If you would like to compare approaches first, we set the two side by side in secondary glazing versus double glazing.
Every project begins with a free survey at your property. We measure each opening, check the condition of the existing frames, discuss whether noise, heat loss, draughts or condensation is the priority, and confirm any consent you are likely to need before anything is ordered.
Don't see your area?
We work across Greater London and the Home Counties. Get in touch for a free survey and we'll confirm coverage for your property.
Request a Free SurveyFrom the Journal
London Property Guides
Reading for London homeowners navigating planning, leasehold rules and the realities of period property across the capital.
- Heritage PreservationNavigating Conservation Area Planning Approval for Secondary GlazingA step-by-step guide to securing planning consent for secondary glazing in London’s most protected neighbourhoods, from pre-application to final sign-off.8 min read
- Technical GuideSecondary Glazing for Leasehold Flats: Permissions and ProcessA practical guide for leaseholders wanting to install secondary glazing, including freeholder permissions, lease terms, and mansion block considerations.9 min read
- London LivingThe Best Streets in London for Period Property Investment in 2026From Belgravia crescents to Islington terraces, where discerning buyers find London’s finest heritage homes.9 min read
- London LivingSilencing the City: How Secondary Glazing Tackles London’s Unique Noise ProblemLondon hits 86dB; the safe threshold is 53dB. Why the 100mm air gap beats double glazing for urban noise.7 min read