Double glazing installers in London – Double Glazing Windows UK

Leading supplier of stylish, made to measure blinds in London and the South East. For a free home appointment and no-obligation quote, please call Mona Blinds on 0800 772 0094.

Blinds & Shutters

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Brompton Glass Ltd

◆ London · SW5 9JF

Discover the perfect double glazing windows and doors for your home or business. Our comprehensive directory showcases a wide range of products and…

Glass & Mirror

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World Choice Windows Ltd

◆ London · SW16 4AD

Discover the perfect double glazing windows and doors for your home or business. Our comprehensive directory showcases a wide range of products and…

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Brookhouse London

◆ London · EC1V 2NX

We are your trusted partner for bespoke windows & doors in Surrey, London, Cobham, Leatherhead, Weybridge, Richmond & Hampshire homes.

Glass & Mirror Windows & Doors

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PAR Glass London LTD

◆ London · NW10 7PF

PAR Glass - London's #1 Leading Glass Supplier and Manufacturer of Glass - Splashbacks, Shower Screens, Mirrors, Doors And Partitions and Balustrades

Glass & Mirror

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Barris Roofing Ltd

◆ London · SW6 1BE

Local domestic roofers in London and Surrey providing a full range of roofing services. NFRC accredited, family run company. Repairs and renewals, flat and pitched roofs

Gutters & Fascias Roofing

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Double glazing in London: what to know

Replacement windows and doors in England must meet the Building Regulations — a U-value of 1.4 W/m²K or a Window Energy Rating of band B, and no worse than the units they replace. A FENSA- or CERTASS-registered installer can self-certify that compliance and register the work, so you get a certificate without arranging building control separately.

When comparing firms in London, check the accreditations each one holds, make sure quotes are like-for-like on frame material and glass specification, and get at least three before you decide. Every listing here is an independent local business, so your enquiry goes straight to the firm.

Double glazing in London — common questions

How much does double glazing cost in London?

As a rough guide, a replacement uPVC casement window is typically around £400–£650 fitted, and a full-house replacement often falls between £4,000 and £8,000 depending on the number of windows, the glass specification and the frame style. Prices vary between firms, so it is worth comparing at least three quotes from installers in London.

Are double glazing installers in London FENSA registered?

Many are. Replacement windows and doors must meet Building Regulations, and a FENSA- or CERTASS-registered installer can self-certify the work and register it for you — so you receive a compliance certificate without arranging building control separately. Each listing shows the accreditations that firm holds.

Do I need building regulations approval for new windows in London?

Replacement windows must meet the Building Regulations, but you usually do not need a separate building control application — a FENSA- or CERTASS-registered installer self-certifies the work. In England the windows must not exceed a U-value of 1.4 W/m²K (or achieve at least a WER band B) and must be no worse than the ones they replace.

How many double glazing installers are listed in London?

We currently list 913 in London. You can compare them above by the services they offer and the accreditations they hold.

How do I get quotes from installers in London?

Use the quote form on this page — enter your postcode and what you need, and we will pass it to matched local installers. It is free and there is no obligation to proceed.