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 Londonderry County Borough 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 Londonderry, Northern Ireland
- Postcodes
- BT47 and BT48
- Pricing region
- Northern Ireland
What do extensions for extra rooms in Londonderry County Borough involve?
- Heating, insulation and glazing
- Planning route check and drawings
- Party wall coordination where needed
- Building control completion
- Fire separation and detection extended to the new space
Which rules apply in Londonderry County Borough?
Extensions for extra rooms in Londonderry County Borough 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 Londonderry County Borough?
| 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 Londonderry County Borough can move the figure either way, which is why we quote after seeing the house.
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 Londonderry County Borough landlords need it?
Landlords in Londonderry County Borough most often ask us for this when:
- Moving to more sharers with consent
- A kitchen too small for the number of sharers
Questions about extensions for extra rooms in Londonderry County Borough
Is a kitchen extension worth it?
Often, when the existing kitchen limits how many people the council will allow. A bigger kitchen can unlock an extra room.
How far do you travel from Londonderry County Borough?
We cover the whole of County Londonderry and work UK-wide. For Londonderry County Borough the nearest towns on our list are Derry (0 miles), Strabane (14 miles), Coleraine (27 miles).
Does a shared house in Londonderry County Borough 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 Londonderry County Borough?
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 Londonderry County Borough
- Derry · 0 mi
- Strabane · 14 mi
- Coleraine · 27 mi
- Omagh · 27 mi
- Ballymena · 42 mi
- Enniskillen · 47 mi
- All of County Londonderry
Other HMO services in Londonderry County Borough
- Loft conversions for extra rooms in Londonderry County Borough
- Communal kitchen refits in Londonderry County Borough
- Layout changes and room reconfiguration in Londonderry County Borough
- Large HMO conversions (7+ sharers) in Londonderry County Borough
- Ensuite installation in Londonderry County Borough
- House to HMO conversion in Londonderry County Borough
- Student HMO refurbishment in Londonderry County Borough
- Void and between-tenancy refurbs in Londonderry County Borough