Entry Door Cost Calculator UK

How the calculation works

Entry door replacement is one of the highest-return investments a household can make in the UK, improving both security and thermal efficiency while adding value to the property. The total cost depends on the door type, its security rating, and whether you pay for professional installation. This explanation covers the EN 1627 classification system (used across Europe, including the UK), the types of door available in the British market, common mistakes to avoid, and when to engage a specialist.

EN 1627 Security Ratings and UK Building Regulations

The European standard EN 1627:2011 classifies the resistance of doors to forced entry into six classes: RC1, RC2, RC3, RC4, RC5 and RC6. For residential properties in the UK, the relevant classes are:

RC1 provides basic manual resistance, protecting only against casual attempts without tools. This is not suitable for an external entry door on a house. RC2, also known as WK2, resists attack with basic hand tools (pry bar, screwdriver) for at least 3 minutes. This is the minimum rating recommended by most UK home insurers and by Building Regulations guidance in England, Wales and Scotland. A terrace in London or a flat in Edinburgh with an RC2-rated door demonstrates responsible security practice. RC3 (WK3) additionally resists powered tools such as drills and angle grinders for 5 minutes, appropriate for detached houses in remote areas, properties in high-crime postcodes, or homes containing valuable contents.

A certified EN 1627 door is tested as a complete assembly: frame, leaf, locking hardware and hinges together. A timber leaf with a non-certified lock provides no EN 1627 protection, regardless of the lock quality. Always request the Manufacturer's Declaration of Performance when purchasing a security-rated door, and check that the installer is competent to install security doors without compromising their certification.

Building Regulations in England and Wales (Regulation 7.2) require all replacement external doors to meet minimum standards for air permeability and thermal performance (Approved Document Part L). In Scotland, Building Standards 4.11 and 4.12 apply similar requirements. These are separate from EN 1627 security ratings; a door can meet thermal requirements without any security rating, or achieve RC2 and still meet thermal performance.

Door Types Available in the UK Market

Timber (solid wood or hardwood veneer) is the traditional choice for period properties and conservation areas. Timber offers aesthetic warmth and can be decorated to match period style, but does not inherently meet any EN 1627 class. Durability depends on timber species and external exposure; a north-facing timber door in Scotland may require re-treatment every 10 to 15 years, whereas a timber door on a south-facing porch may last much longer. Timber frames require regular maintenance and repainting or restaining.

Composite (GRP or timber-effect composite) is a material made from resin and wood fibres, designed to look like timber while being more durable and lower-maintenance. Composite doors are now the single most popular choice for new-build and refurbished properties across the UK, available through large builders' merchants and specialist door suppliers. They resist rot and warping, require only occasional cleaning, and can be colour-matched or wood-stained. Most composite doors available in the UK market do not carry an EN 1627 rating as standard, though some manufacturers offer security-rated composite doors.

PVCu (unplasticised polyvinyl chloride) consists of rigid plastic frames filled with foam, lightweight and very low-maintenance, with good thermal performance. PVCu doors are common in suburban estates and semi-detached houses in the Midlands and the South of England. They are not typically available in security-rated versions.

Security-rated doors (EN 1627 RC2 and RC3) are available in timber, composite, steel and aluminium. A security-rated door includes a reinforced frame, multi-point locking hardware with anti-snap mechanisms, and in some cases internal steel plates. The cost premium over a standard door is significant, but a property in a moderate-risk postcode with an RC2-rated entry door may qualify for a 5 to 15 per cent reduction in home contents insurance. Security-rated doors are always installed by qualified locksmiths or security engineers rather than general carpenters.

Aluminium-framed doors, often with timber cladding, are popular in modern builds and retrofits, offering slim frames and good thermal performance. Aluminium doors do not inherently carry EN 1627 ratings, though some specialist suppliers offer security-rated aluminium-frame assemblies.

Common Mistakes in Door Specification and Installation

Assuming the frame is included in the price is a frequent error. Many retailers quote the cost of the door leaf alone, and frame, hinges, and locking hardware are charged separately. For a security-rated door, the frame must match the security class of the leaf; a certified RC2 leaf in a non-reinforced frame negates the security benefit. Always obtain a quotation that specifies the complete assembly.

Getting the hand (swing direction) wrong means the door will not fit without rebuilding the frame. Most entry doors swing inward. Some period properties or flats with communal entry doors swing outward. Clarify the swing direction with the retailer before ordering.

Not specifying the frame fixing method can cause installation problems. In modern construction, external door frames are usually fixed to the rough opening with plastic plugs and screws into the masonry. In older properties with timber-frame or cavity construction, different fixing may be required. Specify that the frame is to be fixed with chemical anchors (epoxy fixings) or traditional brick bonding, depending on your property's construction.

Choosing a security-rated door but not upgrading the lock defeats the security benefit. RC2 locks have multiple internal components and anti-snap features. Retrofitting a standard lock to an RC2 door compromises security. Verify that the ordered door includes an RC2-rated lock with the security features you require.

Insisting on a timber door without understanding maintenance is unrealistic. Timber entry doors in the UK require repainting or restaining every 5 to 10 years depending on exposure and timber species. A north-facing timber door exposed to rain and wind requires more frequent maintenance than a sheltered south-facing one. If you choose timber, budget for ongoing maintenance or accept a shorter lifespan before replacement.

When to Engage a Specialist

This calculator provides an estimate to help you plan your budget. For an actual replacement, always obtain two to three written quotations that specify the exact door model and its EN 1627 class (if security-rated), the frame material and fixing method, the locking hardware included (make, model, and number of locking points), whether the price includes removal of the existing door, and the timeline for installation.

For security-rated doors (RC2 or RC3), installation must be carried out by a qualified locksmith or security engineer recognised by a trade body such as the Master Locksmiths Association or equivalent. Poor installation can compromise the security benefit of the door, and most insurers require documented proof of proper installation.

If your property is in a listed building or a conservation area, you may face planning or conservation constraints on door style, materials, and colour. Consult your local conservation officer before ordering. If your entry door is shared in a block of flats (a common entrance), check the building's lease or management regulations for restrictions on style, colour or material.

This calculator includes labour for installation and removal as separate line items so you can understand the full scope of cost. Use the calculator to compare scenarios: for example, the cost difference between a standard composite door and an RC2-rated equivalent, or between removing the old door yourself (if feasible) and paying for professional removal.

For thermal and air-tightness performance, modern replacement doors must meet Approved Document Part L (England and Wales) or Building Standard 4.11 and 4.12 (Scotland). Check the product U-value (typically 0.9 to 1.4 W/m²K for modern external doors) and ask whether the supplier will seal the perimeter with low-expansion foam and mastic to minimise air leakage during installation.