Shelters, bunkers and safe rooms in the UK: costs, planning and how to choose a builder

What it is

Three different things get called a shelter:

• A safe room inside the house: a strengthened room with a secure door.
• A basement shelter: an existing or new basement fitted out with air filtration and supplies.
• A buried shelter or bunker in the garden, usually a prefabricated unit.

For a radiation warning, the official UK advice is to go in, stay in and tune in, using an inner room of an ordinary home. Most households start there: see our stay-in room shopping list and which room is safest.

UK planning and building rules

• New basements commonly need planning permission, and digging one is likely to need it because of the size of the works. Converting an existing basement usually doesn't, unless you add a lightwell, change how the outside looks or create a separate home. Councils may set their own limits on basement depth and size (Planning Portal).
• Garden buildings can be permitted development in England within limits: single storey, eaves no higher than 2.5 m, no more than half the land around the original house, and not living accommodation. Listed buildings, conservation areas and Article 4 directions change this (Planning Portal). How this applies to a buried shelter is not clear, so ask your council before you commit, and ask about a Lawful Development Certificate if you're unsure.
• Building regulations apply to basement work: ask your council's building control (GOV.UK).
• Neighbours. In England and Wales you must tell your neighbours about building work near or on a shared boundary (GOV.UK: party walls).
• Rules differ in Scotland, Wales and Northern Ireland. Find your council.

What it costs

• A Lincolnshire builder said a two-bedroom family shelter cost about £90,000, and that a small 2 m by 3 m shelter had cost £12,000 to £14,000 about five years earlier (Lincs Online, 11 December 2023, read 1 Nov 2026).
• Prefabricated bunkers sold in the UK and Europe cost up to about €181,000 (Euronews, 12 September 2025, read 1 Nov 2026).
• These are reported prices, not quotes. Ground conditions, access and air filtration change the cost a lot.

How to choose an installer

• Ask for a site survey and a written quote that lists the air filtration, the door and what standard each is built to. Treat any protection claim as the builder's claim.
• Ask who handles planning, building control and the party wall notices.
• Ask for addresses of finished jobs you can contact, and check the company on Companies House.
• Be wary of anyone who says a shelter will keep you safe from anything, or pushes you to sign quickly.