Double glazing installers in Londonderry – Double Glazing Windows UK

Top Quality Aluminium Windows, Doors, Curtain Walling Systems & Bespoke Glazing Systems throughout Northern Ireland and the UK, England, Scotland and Wales

Windows & Doors

Request quote View profile

MCG Structural Glass

◆ Londonderry · BT47 6JS

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 Structural Glazing Windows & Doors

Request quote View profile

PVC Window Warehouse

◆ Derry · BT48 7SE

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 Hardware & Plastics Windows & Doors

Request quote View profile

Derry Glass

◆ Londonderry · BT48 8SE

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 Windows & Doors

Request quote View profile

Pavo Windows and Doors

◆ Londonderry · BT47 6UQ

Professional double glazing repairs derry donegal and antrim coast, all types of window repairs and door repairs we also supply and install windows and doors

Glass & Mirror Windows & Doors

Request quote View profile

Joe Cassidy Windows & Doors

◆ Greysteel · BT47 3EF

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 Windows & Doors

Request quote View profile

Double glazing in Londonderry: 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 Londonderry, 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 Londonderry — common questions

How much does double glazing cost in Londonderry?

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 Londonderry.

Are double glazing installers in Londonderry 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 Londonderry?

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 Londonderry?

We currently list 12 in Londonderry. You can compare them above by the services they offer and the accreditations they hold.

How do I get quotes from installers in Londonderry?

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.