HMO damp and mould repairs across Cardiff

In short: Damp and mould in an HMO is usually caused by condensation, leaks or rising or penetrating damp, and often by a mix. We carry this out across Cardiff, priced against the HMO rules for Wales and the council’s own standards.

Nation: Wales
Pricing region: Wales
Postcode areas: CF
Main towns: Cardiff, Whitchurch

What do damp, mould and HHSRS repairs in Cardiff involve?

Mould treatment and stain-block
Leak, gutter and roof repairs
Photo report of before and after
Cause-finding survey with moisture readings
Extraction and continuous ventilation
Re-plastering and making good

Which rules apply in Cardiff?

Councils assess hazards, including damp and mould, under the HHSRS, alongside the fitness for human habitation rules for occupation contracts.
Rented homes must meet at least EPC E. Whether the planned EPC C standard will apply in Wales has not yet been confirmed.

Cardiff Council: local HMO schemes

Additional licensing	In force in part of the council area Cathays: 1 Feb 2023 to 1 Feb 2028. Plasnewydd had a scheme from 1 Jan 2021; check with Cardiff Council whether it has been renewed.
Selective licensing	No scheme found

Schemes change. Check the council’s current pages for the exact address in Cardiff before you buy or start work. Source: Cardiff Council HMO licensing page, checked 2026-10-31.

How much do damp, mould and HHSRS repairs cost in Cardiff?

Regional adjustment for Wales. Planning budgets: see our prices page.
Item	UK typical	Local guide	Per
Damp repair, from a single wall to a whole house	£600 – £4,000	£560 – £3,750	job
Mould treatment and making good	£250 – £500	£240 – £470	room

Typical time on site: 2–10 working days. For a figure for your house, try the guide-price tool.

Damp, mould and HHSRS repairs by town in Cardiff

Questions about damp, mould and HHSRS repairs in Cardiff

How quickly should damp be dealt with?

As soon as possible, and quickly where health is at risk. New rules on hazard timescales are coming into the private rented sector; our compliance pages explain what is confirmed.

Will a mould wash fix it?

Only for a while. Unless the cause is fixed, mould comes back.

Do you carry out damp, mould and HHSRS repairs across Cardiff?

Yes, across the whole of Cardiff, including Cardiff, Whitchurch.

Who licenses HMOs in Cardiff?

Cardiff council licenses HMOs in its area. Landlords must also register with Rent Smart Wales.

Damp, mould and HHSRS repairs across Cardiff