There is no law that says a UK workplace must provide a smoking shelter. But the moment you do put one up, smoke-free legislation has plenty to say about what it can look like — and the difference between a compliant shelter and an unlawful one usually comes down to a single test: whether the structure is "substantially enclosed". This guide explains the smoking shelter regulations that apply in the UK, the 50% rule in plain English, and what to check on siting and planning before the shelter arrives.
The law in brief
Since 2007, virtually all enclosed and substantially enclosed workplaces and public premises in the UK have been smoke-free by law. In England the framework is the Health Act 2006 and the Smoke-free (Premises and Enforcement) Regulations 2006; Wales and Northern Ireland have parallel regulations, and Scotland's rules come from the Smoking, Health and Social Care (Scotland) Act 2005. The practical effect is the same everywhere: smoking indoors at work is banned, so smoking moves outside — and a shelter is only lawful if it does not count as an enclosed or substantially enclosed space itself.
The 50% rule explained
In England and Wales, a structure with a roof is "substantially enclosed" if the openings in its walls add up to less than half of the total wall area — doors and windows that can be shut don't count as openings. That is the test a smoking shelter has to pass: keep at least 50% of the total wall area permanently open, and the shelter is not substantially enclosed, so smoking inside it is lawful. Scotland applies a similar "wholly or substantially enclosed" test.
In practice this is why compliant smoking shelters are open-fronted. A typical three-sided shelter with a roof, a fully open front and part-height or perforated side panels stays on the right side of the calculation; box the front in with doors or full-height panels and it tips into "substantially enclosed" territory. If you are modifying a shelter — adding windbreaks, infill panels or an extra bay — redo the sums, because it is the finished structure that gets measured.
Siting: where the shelter goes matters
The regulations govern the structure; common sense and your local authority govern where it stands. Three things to check:
Doors, windows and air intakes. There is no fixed statutory distance in England, but siting a shelter tight against opening windows, entrances or ventilation intakes invites smoke straight back into the building — and complaints with it. Guidance from local authorities commonly suggests keeping shelters several metres clear of building openings.
Boundaries and neighbours. A shelter pushed against the site boundary can drift smoke into neighbouring premises. Corner positions away from shared walkways work better.
Ground and access. A shelter needs firm, level standing. Free-standing units such as the GPC smoking shelters we supply are secured with six 600 × 600 mm paving slabs rather than ground fixings, which keeps installation simple — but the ground still needs to be flat and the delivery route needs forklift access for offloading.
Do you need planning permission?
Possibly. A smoking shelter is a structure, and depending on its size, siting and your premises' planning status, it may need planning permission — particularly in conservation areas, on listed sites, or where the shelter is prominent from the highway. Many small shelters fall within permitted development, but that is a judgement for your local planning authority, not the shelter supplier. A quick call before ordering is far cheaper than a retrospective application.
What a compliant shelter looks like
The shelters in our outdoor shelters range are built for exactly this job: a heavy-duty steel box-section frame with a galvanised sheet steel roof, open-fronted, with a choice of 16 mm twinwall fluted plastic side panels or powder-coated punched steel side and back panels — the punched (perforated) steel keeping airflow through the structure. A wall-mounted version suits sites where a free-standing unit would obstruct walkways. Whichever format you pick, confirm the open-area calculation for your final configuration and siting — the 50% test applies to the structure as installed, not the brochure drawing.
Add a cigarette bin rather than relying on the floor — smoking litter is an offence for the smoker and a headache for the site. If you are also tidying up bins and cycle parking in the same yard, our bin store guide and smoking & cycle shelter buying guide cover the wider options.
What about vaping?
UK smoke-free law covers tobacco smoking — it does not ban vaping indoors or out. Whether employees may vape in the smoking shelter, in a separate area or not at all is an employer policy decision. Many sites treat vaping like smoking for simplicity; others provide a separate vaping area so vapers aren't pushed into second-hand smoke. Either is lawful — just write it into the smoking policy so the rule is clear.
Smoking shelter regulations: FAQ
Is an employer legally required to provide a smoking shelter?
No. There is no duty to provide anywhere to smoke. A shelter is a staff-welfare and site-tidiness choice, not a legal obligation.
Can a smoking shelter have four sides?
Only if the wall openings still add up to at least half the total wall area — in practice four-sided designs rarely pass the test. Open-fronted three-sided designs are the safe pattern.
Does a smoking shelter need planning permission?
Sometimes. Size, siting and the planning status of your premises all matter — check with your local planning authority before ordering.
Does the shelter need no-smoking signage?
No — signage requirements apply to the smoke-free premises, not to the shelter. Clear signage to the shelter, and a bin inside it, are good practice rather than law.
Browse the full smoking, cycle and bin shelter range for specifications and configurations, or contact us with your site layout if you're weighing up free-standing against wall-mounted.