An HMO extension adds space to a shared house, usually a ground-floor bedroom with ensuite or a bigger communal kitchen. Dundonald is 5 miles east of Belfast. We price extensions for extra rooms there against Northern Ireland’s HMO rules and the NI HMO standards and licence conditions, so work is planned to the standard an inspection looks for.
- Area
- Belfast, Northern Ireland
- Postcodes
- BT4, BT5 and BT16
- Location
- 5 miles east of Belfast
- Pricing region
- Northern Ireland
What do extensions for extra rooms in Dundonald involve?
- Ensuite drainage and extraction
- Party wall coordination where needed
- Kitchen or bedroom fit-out
- Building control completion
- Heating, insulation and glazing
Which rules apply in Dundonald?
The rules below are the Northern Ireland-wide position for this kind of work. The NI HMO Unit’s standards and licence conditions apply on top, so we always check the address in Dundonald before we price.
- 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 Dundonald?
| 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 |
Use these as a starting point for budgeting. Access, condition and the council’s requirements in Dundonald can move the figure either way, which is why we quote after seeing the house.
How long does it take?
Allow 8–14 weeks on site for a typical job. Drawings, approvals and long-lead items such as kitchens or fire door sets are booked before we start.
When do Dundonald landlords need it?
Typical reasons for this work in Dundonald:
- Adding a ground-floor room
- Moving to more sharers with consent
Questions about extensions for extra rooms in Dundonald
Will the extension affect neighbours?
Possibly, if it is on or near a boundary. Party wall procedures may apply in England and Wales.
How far do you travel from Dundonald?
We cover the whole of Belfast and work UK-wide. For Dundonald the nearest towns on our list are Holywood (3 miles), Castlereagh (4 miles), Newtownards (4 miles).
Where do I check the HMO rules for an address in Dundonald?
With the local council for the address. 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 do extensions for extra rooms cost in Dundonald?
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 Dundonald
- Holywood · 3 mi
- Castlereagh · 4 mi
- Newtownards · 4 mi
- Belfast · 5 mi
- Newtownabbey · 6 mi
- Bangor (County Down) · 7 mi
- All of Belfast
Other HMO services in Dundonald
- Loft conversions for extra rooms in Dundonald
- Communal kitchen refits in Dundonald
- Layout changes and room reconfiguration in Dundonald
- Large HMO conversions (7+ sharers) in Dundonald
- Ensuite installation in Dundonald
- House to HMO conversion in Dundonald
- Shared bathroom and shower room refits in Dundonald
- Small HMO conversions (3–6 sharers) in Dundonald