Double Glazing Units in London
Supply and installation of sealed units across all London boroughs.
Specialist Double Glazing for London Properties
Across London's 32 boroughs, we regularly work with the distinct property types that define the capital. In inner London – areas like Islington, Camden, Hackney, and Southwark – Victorian and Edwardian terraces dominate. These properties typically feature original timber sash windows, many of which still have single glazing or early, failed double glazed units from the 1980s and 1990s that are now misted and draughty.
In west London boroughs such as Kensington and Chelsea, Hammersmith, and Richmond, larger period properties and mansion flats often sit within conservation areas where planning restrictions govern what glazing changes can be made. We specialise in manufacturing slimline sealed units with krypton gas fill and heritage-profile spacer bars that satisfy conservation officer requirements while delivering modern thermal performance to Building Regulations Part L standards.
South of the river – from Wandsworth and Lambeth through to Greenwich and Lewisham – the mix broadens to include 1930s semis, purpose-built flats, and modern new-builds, each requiring different unit configurations. Our measuring guide helps you get accurate dimensions regardless of your window type.
In outer London – Barnet, Enfield, Croydon, Bromley, and beyond – larger suburban homes often have more straightforward replacement needs, but benefit from our competitive pricing on standard and Low-E coated units.
Our Double Glazing Services in London
Whether you're a homeowner in Peckham, a landlord in Hackney, or a property developer in Canary Wharf, we offer the full range of double glazing services across London.
- Supply Only – Sealed units manufactured to your exact measurements, delivered to any London postcode within 5–7 working days.
- Supply & Install – Full service from survey to installation, carried out by our own professional fitters.
- Replacement Sealed Units – The most popular service in London. We replace failed, misted, or broken units within existing frames – no need for costly full window replacements.
- Emergency Glazing – Board-up and fast-track replacement for broken units, available across Greater London.
- Commercial Glazing – Offices, shopfronts, and commercial premises in the City, Canary Wharf, and across London.
Every unit is built to BS EN 1279 standards and comes with a comprehensive guarantee. Explore our full product range or check the cost guide for transparent London pricing.
Areas We Cover Across London
Our London coverage is comprehensive. We regularly carry out installations and supply units to properties in:
- North London – Camden, Islington, Haringey, Barnet, Enfield, Hackney, Finchley, Muswell Hill, Highgate
- South London – Lambeth, Southwark, Lewisham, Greenwich, Croydon, Bromley, Clapham, Dulwich, Peckham
- East London – Tower Hamlets, Newham, Waltham Forest, Redbridge, Barking, Stratford, Canary Wharf, Shoreditch
- West London – Ealing, Hounslow, Hammersmith, Kensington and Chelsea, Richmond, Chiswick, Shepherd's Bush, Notting Hill
- Central London – Westminster, City of London, Marylebone, Mayfair, Fitzrovia, Covent Garden, Bloomsbury
Don't see your precise area? We cover every London postcode – from E1 to TW, SW to EN. Get in touch with your postcode and we'll confirm availability.
What Our London Customers Say
"We had six Victorian sash windows in our Islington terrace with misted sealed units. Double Glazing Units replaced all the glass within the original timber frames – the difference in warmth and noise reduction has been remarkable. The fitters were punctual, tidy, and clearly knew how to work with period properties. Highly recommended for anyone in north London."
– Sarah T., Islington, N1
Frequently Asked Questions – London
Yes. Many London boroughs permit double glazing in conservation areas provided the units are sympathetically designed. We specialise in slimline sealed units with krypton gas fill that replicate the appearance of original single glazing. You may need planning consent from your local authority – boroughs like Camden, Islington, and Kensington and Chelsea each have their own conservation area guidelines. We can advise on specifications that are most likely to be approved.
Prices for sealed units in London start from around £35 for a standard unit. Victorian sash window replacement units, which are common across London's terraced housing stock, typically range from £55–£120 per unit depending on size and glass specification. Installation costs vary by borough due to access and parking considerations. Visit our cost guide for a full breakdown of London pricing.
Yes. We supply and install double glazing sealed units across all 32 London boroughs and the City of London, including Camden, Hackney, Islington, Kensington and Chelsea, Westminster, Lambeth, Southwark, Tower Hamlets, Greenwich, Lewisham, Wandsworth, Hammersmith and Fulham, Barnet, Enfield, Haringey, Ealing, Hounslow, Richmond, Kingston, Croydon, Bromley, Bexley, and all outer London areas.
In most cases, yes. If your existing timber or uPVC sash frames are in sound condition, we can replace the sealed glass unit within the existing sash without the expense and disruption of a full window replacement. This is particularly popular for Victorian and Edwardian properties in areas like Islington, Hackney, and Clapham, where homeowners want to retain original timber frames while upgrading the glazing.