External UPVC Back Doors

The cost of a uPVC back door depends on your size, chosen style, colour and glazing options.

House of Windows supply only uPVC back doors start from just £466, including VAT and free delivery.

We also offer a Low Price Promise — we’re happy to price match or beat a competitor’s price so you always get excellent value for money.

Yes. House of Windows uPVC back doors are designed to be highly energy efficient, helping maintain a comfortable indoor temperature and reduce energy costs.

Our doors use a 70mm multi-chamber uPVC frame. The chambers trap air to create a thermal barrier that slows heat transfer.

We also use a double-rebated profile and patented double-action ‘bubble’ gaskets (Liniar), delivering superior weather tightness and helping to prevent draughts and water ingress — even in harsh weather.

House of Windows offer an impressive range of made-to-measure sizes.

• Widths: 700mm up to 1100mm
• Heights: 1300mm up to 3000mm

Ultra slim sightlines help deliver a modern aesthetic without compromising on door size. This flexibility makes our uPVC back doors suitable for everything from traditional cottages to contemporary, buggy or wheelchair-friendly openings.

Yes. We offer a range of thresholds to suit different access and installation requirements:

• Standard 77mm frame
• Lower 57mm frame
• Low 25mm aluminium frame (commonly used as a wheelchair compliant threshold) – can be installed flush to the floor to reduce trip hazards and improve access for buggies, prams and mobility needs.

It depends on your installation and the existing construction of your property.

A cill isn’t always necessary, but where required it helps deflect rainwater away from the base of the door to prevent water ingress and improve weather tightness.

We offer four cill options:

• No Cill – where a cill isn’t required or already exists.
• 85mm Stub Cill – discreet option for limited external space.
• Standard 150mm Cill – the most common all-round option.
• 180mm Cill – larger projection for wider brickwork or openings.

Tip: If you have the measurements of your door opening (or a photo of the installation area), our team can help you choose the best cill size.

Yes. House of Windows uPVC back doors can be supplied opening inwards or outwards, with left or right hand hinges. Your door is manufactured to your chosen configuration to ensure it suits your home and available space.

Yes. Our uPVC back doors are available in a wide choice of panel styles, colours and hardware finishes, allowing you to create a door that suits both modern and traditional homes.

You can choose from moulded or flat panels and customise your door with a choice of colour from 14 colourways, including white, coloured woodgrain both sides, or coloured woodgrain outside with white inside. Dual-colour options are also available for a more bespoke look.

Door furniture is available in white, polished chrome, black, polished gold, polished chrome stainless steel, or polished gold stainless steel. Our uPVC back door system also includes a common rebate detail, which allows you to add astragal bar glass decoration where required.