Composite Door Installation Costs UK — What to Charge to Fit a Front Door in 2026

What Is a Composite Door?

A composite door is built from several materials bonded together to play to each one's strengths. The outer skin is usually GRP (glass-reinforced plastic), which gives a hard, weatherproof, low-maintenance surface that can be moulded to look like timber. Behind that skin sits a solid, insulated foam core — typically high-density polyurethane — that delivers the thermal performance and the reassuring weight when the door closes.

Compared with a UPVC door, a composite is more rigid, more secure and far less prone to warping or discolouring. Compared with a timber door, it doesn't swell, rot, crack or need repainting every few years. That low-maintenance, high-security story is exactly what most customers are buying, so it's worth being able to explain it clearly at the quote stage — it justifies your price and separates you from installers who just hand over a number.

Supply and Fit: What to Charge All In

For most jobs the customer wants a single price to supply and fit a new composite front door. For a standard mid-range door — including the frame, a multipoint locking mechanism and standard furniture (handle, letterplate, knocker, spy hole) — a typical all-in price in 2026 is £900–£1,600. That covers the door unit, fixings and trims, labour for a straightforward like-for-like swap, and removal of the old door.

Price toward the bottom of that range for a basic colour, standard size and easy access; price toward the top for a better-specified door, decorative glazing, a tricky frame or a more affluent area. Anything with side panels, made-to-measure sizing or structural work sits above this range — covered further down.

The Door Unit Alone

Whether you buy from a trade supplier or the customer supplies their own, it helps to know what the door slab and frame cost on their own, before labour. Prices vary with the slab design, the glazing, the colour and the brand.

• Basic composite door (plain or simple style, standard size): £400–£700
• Mid-range composite door (better core, popular styles, colour both sides): £700–£1,200
• Premium / designer door or decorative glass: £1,200–£2,000+

Decorative or bevelled glass, RAL-matched colours, contemporary slab designs and bigger-name brands push you up through these bands. When you quote supply and fit, the door unit is usually your single biggest line cost, so confirm the exact spec with the customer before you commit to a price.

Fit-Only Labour (Customer-Supplied Door)

Some customers buy the door themselves online and just want it fitted. On a straightforward like-for-like swap — where the new doorset is the same size as the old one and the opening is sound — fit-only labour is typically £200–£400. That usually covers removing the old door and frame, fitting and packing the new frame square and plumb, hanging and adjusting the door, fitting the furniture, sealing around the frame and taking the old door away.

Be cautious with customer-supplied doors. If the unit arrives the wrong size, badly made or damaged, you can lose a day and end up in a dispute that isn't your fault. Make clear in writing that your fit-only price assumes a correctly measured, undamaged doorset and that any size or structural issues are chargeable extras.

Composite Back and Side Doors

A composite back door or side door is priced much the same way as a front door — often the same or slightly less, because back doors are frequently a smaller or simpler spec with less decorative glazing. The labour to fit is broadly the same since the work is identical: out with the old, in with the new, packed square and sealed. Where a back door opens onto an awkward step, a lean-to or a tight utility space, factor that access into your labour time.

Extras That Add Cost

The base price assumes a simple swap. Plenty of common requests push the job — and the quote — well above the standard range. Watch for these and price each as a clear line item:

• Side panels / sidelights: Glazed panels either side of the door widen the overall frame and add unit cost and fitting time.
• Glazed top lights: A fanlight or top light above the door increases the unit price and the size of the opening you're working with.
• Non-standard sizes and made-to-measure: If the opening doesn't suit a stock size, a bespoke doorset costs more and has a longer lead time.
• New opening or structural work: Forming a new opening, altering brickwork or fitting a lintel is a different job entirely — price the building work separately.
• Threshold and level-access changes: A low or level-access threshold for wheelchair use, or making good a worn step, adds material and labour.
• Upgraded or smart locks: A high-spec anti-snap cylinder, a multipoint upgrade or a smart lock all add to the bill.

Security: PAS 24, Secured by Design and the Lock Standard

Security is one of the main reasons customers choose composite, so it pays to know the standards and quote them by name. PAS 24 is the enhanced security performance standard that a doorset is tested against; many quality composite doors are PAS 24 certified. Secured by Design is the police-backed accreditation that customers and some insurers recognise as a mark of a properly secure product.

The lock cylinder matters just as much as the door. Look for a 3-star (TS007) anti-snap cylinder, or a 1-star cylinder paired with 2-star security handles, to resist snapping, drilling and bumping. Cylinder snapping is one of the most common forced-entry methods, so fitting and quoting a high-grade anti-snap cylinder is an easy, credible upgrade to offer.

Energy Efficiency and the Multipoint Lock

The insulated foam core gives composite doors strong thermal performance. Quality doorsets achieve a U-value of roughly 1.0–1.8 W/m²K depending on the glazing — lower is better. For customers chasing a warmer, draught-free hallway, the U-value is a useful selling point and a genuine point of difference over an old timber or single-skin door.

Composite doors use a multipoint locking mechanism — typically hooks, rollers and deadbolts that engage at several points up the frame when you lift the handle and turn the key. This spreads the locking force, pulls the door tight against the seals for better weather performance, and is far harder to force than a single deadlock. It's standard on a good composite door and worth pointing out when you explain the spec.

Building Regs and FENSA: Is It Notifiable?

This is a common point of confusion. Replacing a door is generally not notifiable in the way replacing a window is. The FENSA self-certification scheme exists because replacement windows have to comply with the energy-efficiency parts of the Building Regulations, and a doorset that is more than 50% glazed is treated like a window for those purposes — but a standard composite door isn't in that category.

Put simply: a like-for-like composite door replacement isn't FENSA-notifiable the way a window is, so you don't need a FENSA certificate for a normal front door swap. Where the job involves a heavily glazed doorset, a new opening or structural work, the relevant Building Regulations still apply — so make sure any glazing and any structural alterations are done correctly and, where required, signed off. If in doubt on a glazed-heavy or structural job, check with building control before you quote.

What Affects the Price

Two composite door jobs are rarely identical. These are the factors that move your quote up or down, and the things to check on a survey before you commit a number:

• Door spec: Basic, mid-range or premium slab, brand, colour both sides and the grade of lock and furniture.
• Size: A stock size keeps costs down; an oversized or undersized opening means made-to-measure and a higher unit price.
• Glazing: Plain, decorative or bevelled glass, plus any side panels or top lights, all change the unit cost.
• Frame condition: A sound, square opening fits quickly; a rotten, out-of-square or damaged surround needs making good first.
• Access: Easy ground-floor access is cheapest; tight passages, awkward steps or upper-floor flats add time.
• Removal and disposal: Taking away and disposing of the old door and frame is usually included, but a heavy timber or composite unit and tip fees should be allowed for.

Quick Reference: Composite Door Prices UK 2026