House to HMO conversion across County Down

In short: A house to HMO conversion turns a single-family home into a house in multiple occupation: a shared home for unrelated people with private bedrooms and shared kitchen or bathroom space. We carry this out across County Down, priced against the HMO rules for Northern Ireland and the council’s own standards.

Nation: Northern Ireland
Pricing region: Northern Ireland
Postcode areas: BT
Main towns: Bangor (County Down), Banbridge, Holywood

What does house to HMO conversion in County Down involve?

Rewiring or upgrades, with an electrical certificate
Extra bathrooms, shower rooms or ensuites
Measured survey and room-size check against the licensing standards
Fire doors, fire-rated linings and an interlinked fire alarm
Decoration, flooring and a handover pack for licensing
New stud walls, door openings and room splits

Which rules apply in County Down?

Licences usually last 5 years, and landlords must also register with the NI landlord registration scheme.
Space and amenity standards come from the HMO (Living Accommodation Standard) Regulations (NI) 2019 and the licence conditions.
Kitchens, bathrooms and WCs must meet the 2019 living accommodation standard regulations and licence conditions.
All new HMOs need planning permission; councils such as Belfast apply HMO policy areas and limits on concentration.
New HMOs need building control approval as well as planning permission.

In Northern Ireland, licensing is run centrally by the NI HMO Unit, and all new HMOs need planning permission and building control approval from the local council.

How much does house to HMO conversion cost in County Down?

Regional adjustment for Northern Ireland. Planning budgets: see our prices page.
Item	UK typical	Local guide	Per
Typical 3–4 bed house to a 5–6 bed HMO, all-in	£30,000 – £75,000	£27,000 – £67,500	project
Conversion works per letting room (walls, linings, electrics, decoration; excludes kitchens, bathrooms and fire systems; our estimate)	£3,500 – £6,500	£3,150 – £5,850	letting room
Ensuite shower room added to a bedroom	£4,000 – £10,000	£3,600 – £9,000	ensuite
Communal HMO kitchen with extra cooking and sink capacity (our estimate from domestic ranges)	£8,000 – £18,000	£7,200 – £16,200	kitchen
Interlinked mains alarm system (Grade D type), small HMO (our estimate from installer guides)	£800 – £2,000	£720 – £1,800	house

Typical time on site: 6–14 weeks. For a figure for your house, try the guide-price tool.

House to HMO conversion by town in County Down

Questions about house to HMO conversion in County Down

How long does a house to HMO conversion take?

Most conversions of a three or four-bedroom house take six to fourteen weeks on site, after drawings and any approvals. Bigger layout changes, extensions or loft rooms add time.

Do you carry out house to HMO conversion across County Down?

Yes, across the whole of County Down, including Bangor (County Down), Banbridge, Holywood.

Who licenses HMOs in County Down?

HMO licensing in County Down, as everywhere in Northern Ireland, is run by the NI HMO Unit at Belfast City Council. Planning and building control are handled by the local council.