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Double glazing installers in London

913 double glazing installers are listed in London, covering areas like London, Chiswick, South Kensington, Finsbury Park, Muswell Hill and Archway. Between them they cover Windows & Doors, Glass & Mirror, Structural Glazing and Gutters & Fascias. Every listing is an independent local business — compare their services and accreditations below, then request free, no-obligation quotes from the firms that suit your project.

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913 installers in London

Hamilton Roofing & Building (Fulham)

◆ London · SW6 2SZ

Welcome to Hamilton Roofing & Building Ltd Your home and its contents are probably your most valuable asset; Hamilton Roofing & Building Ltd can provide you with first class roofing & building services at very competitive prices to help look after this asset. Hamilton Roofing & Building Ltd are proud members of the 'Confederation of Roofing Contractors' and are the first choice for professional roofing services in Fulham & around West London, offering comprehensive roofing services to both residential and commercial customers that include everything from flat roof repair to pitch and lead roofing, new roofs to traditional tile and slate, through to associated services including chimney and brickwork, flashing and guttering. We specialise in all aspects of roofing services, including: • Single ply systems • Topseal systems • Lead Work • Pluvitec • Flat Roofs • Waterproofing • Velux Windows • Slating & Tiling • uPVC Fascias • Chimney Works • Guttering Works • Insulation • Exterior Decorating • General Building Works

Gutters & Fascias Renovation & Refurb Roofing
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IDSystems

◆ London · WC1E 7BT

Award-winning specialists in bespoke glazing systems - bifold doors, sliding doors, balustrades, windows and roofs, from smaller projects to grand designs.

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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.
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