Southwark Joint Tenancy HMO Classification: When a Single Contract Creates an HMO

The Misconception

One of the most common mistakes Southwark landlords make is assuming that a single joint tenancy agreement means the property is not an HMO. Three friends sign one tenancy, pay one rent — so it is one household, one straightforward let. No HMO licence needed.

That is not how the law works.

The Statutory Household Test

Section 254 of the Housing Act 2004 defines a household based on the relationships between the occupants, not the tenancy agreement structure. Section 258 treats people as one household if they are all members of the same family or fall within a relationship category prescribed by regulations. Family includes a married or cohabiting couple and their relatives.

Three friends who are not related and not in a relationship with each other form three separate households, regardless of whether they signed a single joint tenancy or three individual contracts. The tenancy agreement is irrelevant to the statutory classification.

Once a property has three or more occupants forming two or more separate households sharing a kitchen, bathroom or toilet, it meets the definition of a house in multiple occupation.

What This Means in Southwark

Three unrelated sharers on a joint tenancy: three occupants, three households, sharing amenities. This is a small HMO. It needs a Southwark additional HMO licence (£1,433), regardless of which ward it is in — the additional scheme runs borough-wide.

Five unrelated sharers on a joint tenancy: five occupants, five households, sharing amenities. This is a large HMO. It needs a mandatory HMO licence (£1,653.50+), again regardless of ward.

Two unrelated sharers on a joint tenancy: they form two households under Section 258 of the Housing Act 2004. Southwark's additional scheme applies to HMOs occupied by three or more people, so a private rental occupied by two unrelated sharers needs a selective licence (£945) if it is in one of the 19 designated wards; in an exempt ward, no selective licence is needed.

A couple and one friend: the couple forms one household, the friend forms another. Three occupants, two households — additional HMO licence required.

The Fire Risk Assessment Shock

The practical sting of HMO classification is not just the licence fee. HMO properties need a suitable and sufficient fire risk assessment, which many small landlords have never commissioned. The assessment often reveals remedial works — fire doors, upgraded alarm systems, emergency lighting — that can cost more than the licence itself.

LandlordZONE forums document Southwark landlords who discovered this only after the council classified their three-friend flat as an HMO. The fire risk assessment revealed extensive works, and the landlord found themselves choosing between expensive remediation or giving notice to tenants and reducing to two occupants.

Checking the Classification Before Letting

Before agreeing tenancy terms, count the occupants and assess their household relationships. If three or more unrelated individuals will share, plan for HMO licensing from the start. This means budgeting for the licence fee, commissioning a fire risk assessment, checking room sizes against Southwark's space standards and ensuring the property has adequate bathroom and kitchen facilities for the occupant count.

Discovering the HMO requirement after the tenants have moved in creates urgency — the property is already unlicensed, and every day of unlicensed operation is an ongoing offence.

For a decision tree that walks through every occupancy scenario and identifies which Southwark licence applies, see the full licensing guide.

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