Southampton HMO Licence: Which Scheme Applies to Your Property

Southampton operates two HMO licensing schemes right now, and a third — selective licensing — is not active. If you rent out a shared property in the city, working out which scheme catches your property (or whether any scheme does) is the first compliance question you need to answer.

The Two Active Schemes

Mandatory HMO licensing covers the entire city. Any property occupied by five or more people from two or more separate households, where they share facilities like a kitchen or bathroom, needs a mandatory HMO licence. This is a national requirement under Part 2 of the Housing Act 2004 — it applies citywide regardless of which ward the property sits in.

Additional HMO licensing is Southampton City Council's local scheme. It came into force on 1 October 2025 and runs until 30 September 2030. It captures smaller HMOs — properties with three or four occupants from two or more households sharing amenities — but only in nine designated wards: Banister and Polygon, Bargate, Bassett, Bevois, Freemantle, Millbrook, Portswood, Shirley and Swaythling. It also picks up HMOs inside purpose-built blocks of flats in those wards, which mandatory licensing excludes.

Selective licensing is not active in Southampton. Single-household rentals do not currently need a property licence under the Housing Act 2004 in this city.

How to Work Out Which Licence You Need

The decision turns on two facts: how many people live in the property and how many separate households they form.

A "household" under Section 258 of the Housing Act 2004 means members of the same family — married or cohabiting partners, parents, children, siblings, grandparents, grandchildren, uncles, aunts, nephews and nieces (including step and half-relations). Three unrelated sharers signing a joint tenancy form three separate households. Four members of one family, even on separate agreements, remain one household.

Start with the headcount. If the property houses five or more people from two or more households sharing facilities, it needs a mandatory licence — no matter where it is in Southampton. If it houses three or four people from two or more households sharing facilities, check the ward. Inside the nine additional-licensing wards, that property needs an additional licence. Outside those wards, no licence is needed unless it crosses the five-person mandatory threshold.

A resident landlord with up to two lodgers is exempt. Add a third lodger, and the property becomes an HMO — triggering additional licensing in the nine wards or mandatory licensing once total occupancy hits five.

Purpose-Built Flats: The Local Exception

Nationally, purpose-built flats in blocks of three or more self-contained units are excluded from mandatory HMO licensing. Southampton's additional licensing scheme deliberately closes that gap. A flat in a purpose-built block occupied by three or more sharers from separate households in one of the nine wards needs an additional licence.

Section 257 converted blocks — buildings where the conversion did not comply with the Building Regulations applicable to the conversion and less than two thirds of the flats are owner-occupied — are excluded from the additional scheme.

What Happens Next

Once you know which licence applies, the process is the same for both schemes: apply through the council's online portal, submit the required safety certificates, pay the Stage 1 fee, pass the fit-and-proper-person assessment, and complete the Stage 2 payment when the council issues its notice of intention to grant. The standard fee is £953, though landlords who use an approved independent surveyor pay £636 — a £317 saving.

Operating without a licence when one is required can expose you to civil penalties of up to £40,000 for offences committed on or after 1 May 2026 (£30,000 for earlier offences), criminal prosecution and rent repayment orders from tenants. Submitting a valid application gives you immediate legal protection under Section 72(4) while the council processes it.

For a full walkthrough of the application process, documents and fee tiers, see our step-by-step Southampton licensing guide.

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