Landlord licensing explained
There are three kinds of property licence a private landlord in the UK might need. Two are set by your local council for specific areas, and one applies nationwide. Getting this wrong is expensive, so here is how the whole system fits together.
The three licence types
Mandatory HMO licensing applies everywhere in England. Any property let to 5 or more people forming 2 or more households who share a kitchen, bathroom or toilet needs one. There is no storey requirement any more (that was removed in October 2018).
Additional HMO licensing is a discretionary scheme a council can bring in to cover smaller HMOs, typically those let to 3 or 4 sharers, that fall below the mandatory threshold. It only applies where the council has designated it.
Selective licensing is a discretionary scheme covering ordinary private rented homes (not just HMOs) within a designated area, often a few streets or wards with housing or antisocial-behaviour problems. If your let is in the designated area, you need a licence even for a single family tenant.
How to tell which you need
Start with occupancy. Five or more people in two or more households almost always means mandatory HMO licensing, wherever the property is.
Then check your council. If it runs an additional licensing scheme and you let a 3-4 person HMO, you likely need an additional licence. If it runs a selective scheme and your address is inside the designated area, you need a selective licence even for a single household.
Because selective and additional schemes are frequently designated at street or part-ward level, the only reliable way to know is to check your specific address against the council's designation map. Our postcode checker does the first pass for you and the paid report gives the property-specific verdict.
Wales, Scotland and Northern Ireland
Wales has both. Every landlord must register with Rent Smart Wales, and self-managing landlords need a licence with training, backed by fixed penalties, unlimited fines and rent stopping orders. On top of that, Welsh councils hold exactly the same powers as English ones to designate selective and additional licensing schemes, because the Housing Act 2004 extends to England and Wales. Nine of the twenty-two Welsh councils currently run one, several of them county-wide, with fees running past £2,000. Registering with Rent Smart Wales does not cover you for those.
Wales also kept the three-storey test for mandatory HMO licensing that England dropped in 2018, so a Welsh property needs a mandatory licence only where it has three or more storeys as well as 5 or more occupants in 2 or more households.
Scotland requires all landlords to register with each council where they let, renewing every three years, with fines up to £50,000 for letting unregistered. HMO licensing is stricter than England's: a licence is needed where 3 or more people from 3 or more households share, not England's 5 in 2. Scottish councils cannot run selective or additional licensing at all, because the Housing Act 2004 does not extend to Scotland.
Northern Ireland has a landlord registration scheme plus HMO licensing, administered by the NIHMO Unit at Belfast City Council for all eleven councils. An HMO licence is needed where 3 or more people forming more than two households occupy the property, again a lower threshold than England's. Northern Irish councils cannot run selective or additional licensing either.