Installed UK-wide

Security doors

Steel and steel-faced doorsets for back doors, stock rooms, plant rooms and side entrances, fitted across the UK. They suit premises where the vulnerable door is not on the shop window. Indicative prices start at £800–£1,500 for a standard steel door, rising with the security rating.

Consents this work tends to involve

  • Planning permission
    Sometimes

    A rear service door rarely needs it. A new door on a front or prominent side elevation, or in a conservation area, may.

  • Listed building consent
    Sometimes

    Replacing a historic door or its frame on a listed building.

  • Building regulations
    Often needed

    If the door is on an escape route its hardware must let people out without a key.

An installer’s general guide; your council decides.

Pair of fully glazed aluminium entrance doors with long pull handles under a glazed fanlight
Pair of fully glazed aluminium entrance doors with long pull handles under a glazed fanlight.

What does an LPS 1175 rating actually tell you?

It tells you how long a tested doorset resisted a defined attack with a defined tool kit — not that it cannot be opened. A rating is only worth having if the whole set was tested together: leaf, frame, hinges, locks and fixings. A strong door in a weak frame is not a rated door.

Ask for the certificate and check the product on it matches what is being fitted. Insurers sometimes specify the rating; when they do, they will want the paperwork too.

Can a security door also be a fire exit?

Yes, and it often has to be. A door on an escape route needs hardware that opens from inside in one action without a key — emergency exit devices for staff-only routes, panic bars where the public may use it. Security comes from the outside face and the frame, not from locking people in.

Standards and regulations

ReferenceWhat it covers
LPS 1175Intruder resistance — security rating of the complete doorset.
BS EN 1627Burglar resistance classes RC1–RC6 for doors, windows and shutters.
BS EN 179 / BS EN 1125Emergency exit devices (staff-only routes) and panic exit devices (public routes).

Indicative prices

  • Standard steel door£800 – £1,500
    Galvanised steel with multi-point lock
  • LPS 1175 SR2 door£1,500 – £3,000
    Certified to the SR2 grade
  • LPS 1175 SR3 door£2,500 – £5,000
    Certified to the SR3 grade

Supply and fit, before survey. How prices are built up.

Questions

Does a steel back door need planning permission?
Usually not when it replaces an existing rear door in the same opening. It may if the door faces the street, changes the opening, or the building is listed or in a conservation area — ask the council if any of those apply.

Related

  • Fire doors — Certified doorsets for stairs, plant rooms and escape routes, fitted so the rating holds.
  • Roller shutters and grilles — Internal, lattice and vision shutters chosen for the street they face, not just the risk.
  • Aluminium entrance doors — Commercial entrance doors on floor springs or closers, with level thresholds.
  • Composite doors — Heavy, reinforced front doors in period styles, for houses and flats over shops.

Talk to a person at Sigma

Ring, WhatsApp a photo, or leave one line below. We reply to emergency repair calls within two hours.

Want to add a photo or more detail? Use the full form.

CallMessage
WhatsApp 07397 066538