An HMO extension adds space to a shared house, usually a ground-floor bedroom with ensuite or a bigger communal kitchen. For a house in Bangor (County Down) we start with a measured survey, check the NI HMO standards and licence conditions for the number of sharers, and then price each item separately.
- Area
- County Down, Northern Ireland
- Postcodes
- BT19 and BT20
- Location
- 11 miles north-east of Belfast
- Pricing region
- Northern Ireland
What do extensions for extra rooms in Bangor (County Down) involve?
- Planning route check and drawings
- Heating, insulation and glazing
- Foundations, structure and roof
- Party wall coordination where needed
- Building control completion
Which rules apply in Bangor (County Down)?
Extensions for extra rooms in Bangor (County Down) must satisfy national law for Northern Ireland, the NI HMO standards and licence conditions and, where walls, drainage or fire separation change, the building rules. In short:
- 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.
- The NIFRS HMO Fire Safety Guide (July 2026) usually expects Grade D1 interlinked detection in smaller shared houses and a Grade A system with more than 6 occupants or over 200 m².
- Kitchens, bathrooms and WCs must meet the 2019 living accommodation standard regulations and licence conditions.
How much do extensions for extra rooms cost in Bangor (County Down)?
| Item | UK typical | Local guide | Per |
|---|---|---|---|
| Single-storey extension, about 15 m² | £35,000 – £60,000 | £31,500 – £54,000 | project |
| Single-storey extension per m² | £1,800 – £4,000 | £1,600 – £3,600 | m² |
These are typical ranges including VAT, adjusted for Northern Ireland, where costs run below the UK average. The fixed price for a house in Bangor (County Down) follows a site visit.
How long does it take?
Typical time on site: 8–14 weeks. We agree the programme with you before starting and send photo updates as the work progresses.
When do Bangor (County Down) landlords need it?
Landlords in Bangor (County Down) most often ask us for this when:
- Moving to more sharers with consent
- Adding a ground-floor room
Questions about extensions for extra rooms in Bangor (County Down)
Do you handle building control?
Yes, from application to completion certificate.
Which postcodes in Bangor (County Down) do you work in?
All of them, including BT19 and BT20, and the surrounding parts of County Down.
Does a shared house in Bangor (County Down) need an HMO licence?
Yes, if 3 or more people forming more than two households live there as their main home and pay rent. Licensing for every council in Northern Ireland is run by the NI HMO Unit at Belfast City Council.
How much do extensions for extra rooms cost in Bangor (County Down)?
Our guide ranges for Northern Ireland are in the table on this page, and the guide-price tool gives a figure for your house. A fixed written quote follows a free site visit.
Extensions for extra rooms near Bangor (County Down)
- Newtownards · 5 mi
- Holywood · 6 mi
- Carrickfergus · 7 mi
- Dundonald · 7 mi
- Newtownabbey · 10 mi
- Castlereagh · 11 mi
- All of County Down
Other HMO services in Bangor (County Down)
- Loft conversions for extra rooms in Bangor (County Down)
- Communal kitchen refits in Bangor (County Down)
- Layout changes and room reconfiguration in Bangor (County Down)
- Large HMO conversions (7+ sharers) in Bangor (County Down)
- Ensuite installation in Bangor (County Down)
- House to HMO conversion in Bangor (County Down)
- Bedroom upgrades and room refits in Bangor (County Down)
- Licence condition and schedule-of-works in Bangor (County Down)