For landlords and investors with an eye on Cardiff’s rental market, the CF24 postcode continues to stand out as one of the most compelling HMO opportunities in Wales. Covering Cathays, Roath, and the increasingly sought-after Splott, this corridor of the city delivers strong, consistent demand from students, young professionals, and postgraduate contract holders – and in 2026, the numbers are telling a very clear story.
This guide breaks down what you need to know: achievable room rents, gross yields, Cardiff Council’s HMO concentration rules, and the Welsh legal framework every landlord operating here must understand.
Why CF24 remains Cardiff’s strongest HMO postcode
CF24 benefits from a rare combination of factors that few postcodes in Wales can match. Cardiff University and Cardiff Metropolitan University together enrol over 50,000 students, with Cathays sitting directly adjacent to the main Cathays campus. This creates a near-permanent pool of demand for shared housing that simply does not dry up between cycles.
Roath adds a layer of professional appeal, with its café culture along City Road, independent restaurants, and easy access to Cardiff city centre. Splott, meanwhile, is undergoing a genuine transformation – new residential developments, improved transport connectivity, and growing footfall are attracting a younger, working professional demographic that is increasingly comfortable in HMO-style accommodation.
Room rents and gross yields in 2026
Based on current market activity across Cathays, Roath, and Splott, achievable room rents for compliant HMOs in CF24 are benchmarking at £650 to £700 per calendar month per room in 2026.
For a well-maintained five-bedroom HMO at full occupancy, that equates to a monthly gross income of £3,250 to £3,500. On a property purchased at £350,000 – a realistic entry point in this postcode – landlords are looking at gross yields in the region of 11% to 12%.
These figures are meaningfully above the Cardiff-wide buy-to-let average, and they reflect the premium that compliant, well-managed HMOs are commanding in a tightening supply environment.
Cardiff Council’s HMO concentration policy and what it means for values
Cardiff Council operates one of the most actively enforced HMO saturation policies in Wales. Under the current planning framework, any street where more than 25% of properties are already classified as HMOs is considered saturated, and new HMO applications in those streets are typically refused.
This policy has had a direct and measurable effect on the market. Compliant, licensed HMOs in CF24 are now trading at a 10 to 15% premium over comparable standard buy-to-let properties, simply because the supply of new conversions is restricted.
What this means for buyers and existing landlords
For investors looking to enter the market, this premium is worth paying. A licensed, compliant HMO on a non-saturated street represents a protected asset – one that cannot easily be replicated by a competitor down the road.
For existing landlords in CF24, it reinforces the importance of maintaining compliance. A property that loses its HMO licence does not just face a regulatory problem – it faces a valuation problem too.
The Welsh legal framework: what CF24 landlords must know in 2026
Operating an HMO in Cardiff means navigating a legal framework that is distinct from the rest of the UK. Wales has its own legislation, and the requirements are specific and enforceable.
Renting Homes (Wales) Act 2016
All residential tenancies in Wales are now governed by the Renting Homes (Wales) Act 2016, which came fully into force in December 2022. Under this legislation, the term “tenant” is replaced by “contract holder”, and all occupiers must be issued with a written occupation contract – either a fixed-term standard contract or a periodic standard contract.
For HMO landlords in CF24, this means every room in your property requires its own compliant occupation contract. There is no flexibility on this point, and failure to issue a correct contract affects your ability to serve a valid notice to vacate.
The Act also introduces fitness for human habitation requirements, which carry particular weight for HMOs given the shared nature of facilities.
Rent Smart Wales licensing and enforcement updates
Every landlord letting property in Wales must be registered with Rent Smart Wales. If you manage your own properties, you must also hold a valid Rent Smart Wales licence and complete the required training.
In 2026, Rent Smart Wales’s enforcement activity has continued to intensify. Landlords operating without registration or a valid licence face civil penalties of up to £7,500 for a first offence, with repeat offences attracting higher sanctions. Cardiff remains one of the most active local authority areas for enforcement referrals.
For HMO landlords specifically, Rent Smart Wales compliance sits alongside – not instead of – the mandatory HMO licence issued by Cardiff Council. Both are required. Neither substitutes for the other.
HMO licensing requirements in Cardiff
Any property in Cardiff occupied by five or more contract holders forming more than one household must hold a mandatory HMO licence. Cardiff Council also operates an additional licensing scheme across much of CF24, meaning smaller HMOs with three or four contract holders may also require a licence depending on location.
Licenses must be renewed every five years, and Cardiff Council carries out inspections as part of the renewal process. Fire safety, room sizing, kitchen and bathroom ratios, and general property condition are all assessed.
Practical advice for CF24 HMO landlords in 2026
Whether you manage one HMO or a portfolio across Cathays and Roath, a few practical steps will protect both your income and your compliance standing. Audit your occupation contracts now to ensure they meet the Renting Homes (Wales) Act requirements. If you are still using pre-2022 tenancy agreements, they will need to be updated.
Check your HMO licence expiry date and begin the renewal process at least three months in advance – Cardiff Council’s processing times can extend during busy periods. Review room rents against the current CF24 market. If your rents are below £650 per room, you may be leaving meaningful income on the table, particularly if you have recently invested in improvements.
How Belvoir Cardiff can help
At Belvoir Cardiff, we work with landlords across CF24 – from first-time HMO investors to experienced portfolio landlords managing multiple properties in Cathays, Roath, and Splott. We understand the local market in detail, and we understand the Welsh legal framework that governs it.
Whether you need help maximising your HMO yield, ensuring your occupation contracts are compliant, or navigating Cardiff Council’s licensing process, the team at Belvoir Cardiff is here to support you at every stage.
Ready to make the most of your CF24 investment?
If you own or are considering purchasing an HMO in Cardiff’s CF24 postcode, now is the time to get a clear, accurate picture of what your property could achieve.
Book a valuation with Belvoir Cardiff today to find out exactly what your HMO is worth in the current market – and how to position it for maximum return in 2026.
To speak with a member of our lettings team about HMO management, licensing support, or investment advice in Cathays, Roath, or Splott, get in touch with Belvoir Cardiff directly. We are ready to help you move forward with confidence.
