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Energy-Efficient Front and Back Doors: cost, savings and EPC impact

An old external door can let in noticeable draughts, but a new one is a modest energy upgrade. Security, appearance and fit are usually bigger reasons to buy.

IndicativeFigures on this page are indicative ranges for a typical UK home. They are not a quote, a survey or an EPC. Your home will differ.

What it is

A new insulated composite, timber or uPVC door and frame is fitted with proper seals. Good fitting matters as much as the door itself.

If your door is sound but draughty, new seals and a letterbox brush might be enough.

Indicative cost, savings and EPC effect

Small energy gain on its own; security and appearance matter too.

Prices vary a lot by home. See the Energy Saving Trust’s retrofit guide for general background.

A door replacement adds little to an EPC on its own. See how EPC ratings work. Savings from several upgrades do not simply add up.

Is it right for your home?

• Doors that are warped, damaged, poorly fitting or not secure.
• Doors that open straight into the living space of a home, where draughts are felt more.
• In a conservation area or listed building, check what consent is required before changing a door.

What affects the price

• Door and frame material and style
• Glazed panels and side windows
• Locks and security rating
• Whether the frame also needs replacing

Questions to ask any installer

• What U-value does the door achieve, and does it carry a security rating?
• Is the installer registered with a competent person scheme so the fitting is signed off?

Always get a proper survey and written quote. We introduce you to one vetted firm to do that, and explain why only one.

Related upgrades

• Double and Triple Glazing
• Draught-Proofing
• Roofline: Fascias, Soffits and Guttering