HMO fire alarm systems across Cardiff

In short: An HMO fire alarm is an interlinked system of smoke and heat detectors that sounds everywhere in the house when one detector triggers. In Cardiff we survey first, price each item separately and hand over the certificates and photos a council asks for.

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

What do fire alarm and detection systems in Cardiff involve?

Maintenance and testing visits
Mains-wired interlinked smoke and heat detectors
Survey and system design to the fire risk assessment
Carbon monoxide alarms where needed
Panel systems for larger HMOs
User instructions and a logbook

Which rules apply in Cardiff?

Fitness for human habitation rules require mains-powered, interlinked smoke alarms on every storey and CO alarms where there is a gas, oil or solid-fuel appliance.
Mandatory licence for HMOs with 3 or more storeys and 5 or more people in 2 or more households; Wales did not adopt England’s 2018 change.
An electrical inspection and test at least every 5 years, with the report given to the contract-holder within 14 days.
Council HMO standards and the fire risk assessment set detection, fire doors and escape routes.
Councils such as Cardiff and Swansea run additional licensing for HMOs outside the mandatory scheme.

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 fire alarm and detection systems cost in Cardiff?

Regional adjustment for Wales. Planning budgets: see our prices page.
Item	UK typical	Local guide	Per
Interlinked mains alarm system (Grade D type), small HMO (our estimate from installer guides)	£800 – £2,000	£750 – £1,900	house
Panel alarm system (Grade A type), larger HMO	£1,750 – £4,500	£1,650 – £4,250	house
Emergency light fitting, installed (our estimate)	£150 – £350	£140 – £330	fitting

Typical time on site: 1–4 working days. For a figure for your house, try the guide-price tool.

Fire alarm and detection systems by town in Cardiff

Questions about fire alarm and detection systems in Cardiff

What grade of fire alarm does an HMO need?

There is no single answer in law. Guidance links the grade and coverage to the size of the house and the risk, and your fire risk assessment and council will set it. We install to that specification.

How often should the alarm be tested?

Guidance usually asks for regular user tests and periodic servicing by a competent person. We can set up a maintenance schedule.

Do you carry out fire alarm and detection systems 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.

Fire alarm and detection systems across Cardiff