Wales HMO Licence vs Rent Smart Wales — Do You Need Both?

Two Licensing Systems, One Property

Landlords in Wales sometimes assume that paying for one licence covers them for both. It does not. Rent Smart Wales operates under Part 1 of the Housing (Wales) Act 2014 as a national scheme — every landlord letting residential property in Wales must register, regardless of property type. HMO licensing runs under Parts 2 and 3 of the Housing Act 2004, administered by your local council, and applies only to houses in multiple occupation that meet specific criteria.

A property can trigger both requirements at the same time. A three-storey shared house in Cathays with five tenants needs mandatory HMO licensing from Cardiff Council and a Rent Smart Wales landlord registration (plus a landlord licence if you self-manage). Holding one does not satisfy the other.

What Rent Smart Wales Covers

Rent Smart Wales is a person-based scheme, not a property-based one. You register yourself as a landlord and list every Welsh rental property on your account. If you self-manage — arranging viewings, collecting rent, instructing repairs — you also need a Rent Smart Wales landlord licence, which requires approved training and a fit-and-proper person check.

The registration fee is £60 online (£102 paper), and a self-managing licence costs £254 online (£327 paper). Both last five years.

If you appoint a fully licensed letting agent to handle all lettings and management, you still register personally but skip the landlord licence — the agent holds their own agent licence instead.

What HMO Licensing Covers

HMO licensing is a property-based scheme. It applies when a dwelling is occupied by three or more people forming two or more separate households who share facilities like a kitchen or bathroom.

Mandatory HMO licensing (England and Wales) catches larger HMOs: properties occupied by five or more people in two or more households. Your local council issues the licence; fees and licence terms are set by the relevant authority.

Additional licensing is a discretionary scheme that councils can layer on top. Cardiff Council runs additional licensing in Cathays, Plasnewydd, and Gabalfa for smaller HMOs that fall below the mandatory threshold. Swansea, Newport, and other councils may have their own schemes. Check your specific local authority.

Where They Overlap — and Where They Do Not

A standard single-let flat needs Rent Smart Wales registration (and a licence if self-managed), but no HMO licence. A shared house meeting HMO criteria needs both systems. Section 44 links Section 173 notices to Rent Smart Wales registration and licensing; HMO licensing is a separate local-authority requirement.

Cardiff's Additional Licensing in Practice

Cardiff has some of the densest HMO concentrations in Wales. The council's additional licensing scheme covers smaller HMOs below the mandatory licensing threshold in designated wards. The fee is separate from Rent Smart Wales. Check the current scheme to confirm which council licence applies to your property.

The practical lesson: check both the Rent Smart Wales public register for your personal compliance status and your local council's HMO register for each property.

Getting Both Right

The sequencing matters. Register with Rent Smart Wales and secure your landlord licence (if self-managing) before marketing any property. Apply for an HMO licence from your local council before letting to the number of tenants that triggers the HMO threshold. Running either scheme without the proper licence exposes you to fixed penalty notices from Rent Smart Wales (up to £150) and separate council enforcement for unlicensed HMO operation.

Our Rent Smart Wales Registration and Licensing Guide walks through the national registration and licensing steps — including a pre-application worksheet and dual-clock renewal tracker — so you can get the Rent Smart Wales side locked down before tackling your council's HMO requirements.

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