Composite Door Cost Breakdown

A composite door supplied and fitted in the UK typically ranges from around £900 to £1,800, with premium designs, sidelights or complex glazing pushing costs higher still. This is a wide range because composite doors vary enormously in construction quality, core material and finish. Rather than fixating on a single number, it is more useful to understand the components that make up the price so you can judge whether a quote represents fair value for the specification offered.

The slab itself, typically a GRP skin over a solid timber or insulating foam core, is the largest single cost component. Higher-density foam cores and thicker GRP skins tend to cost more but offer better durability and thermal performance. Cheaper doors sometimes use hollow or lower-density cores, which can affect how the door feels and performs over time, so it is worth asking your installer directly what core material is used rather than assuming all composite doors are equal.

Doors with glazed apertures cost more than solid designs, and the price rises further with decorative or leaded glass units, especially bespoke patterns. Toughened safety glass is standard for door glazing and should always be specified. If you want a fully bespoke glass design, expect this to be one of the more significant variables in your final price, so discuss options early in the quoting process.

Standard multi-point locking is included as a baseline on most composite doors, but upgraded cylinders with anti-snap protection, smart locks, or heritage-style furniture will add to the cost. Given that the front door is a key security point for the home, it is worth viewing hardware upgrades as a worthwhile investment rather than a place to cut corners, particularly for ground-floor or highly visible entrances.

Adding glazed sidelights, a top light, or a wider frame to fill an existing opening will increase both material and labour costs. Installation complexity also varies: replacing a like-for-like door in good structural condition is more straightforward than altering an opening or working around period brickwork. Your installer should clarify any structural work needed at survey stage so it is reflected in the fixed quote rather than added later.

When comparing composite door quotes, check that each one specifies the core material, glass specification, lock grade and guarantee length, not just a headline price. A lower quote that omits details on core density or lock type may not be comparable to a higher one that specifies premium components. Ask for these details in writing so you can make a fair, informed comparison across multiple quotes.