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 Derry 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. With students as well as working sharers renting in Derry, we plan bigger jobs for the gap between academic-year tenancies where we can.
- Area
- County Londonderry, Northern Ireland
- Postcodes
- BT47 and BT48
- Pricing region
- Northern Ireland
What do extensions for extra rooms in Derry involve?
- Foundations, structure and roof
- Planning route check and drawings
- Fire separation and detection extended to the new space
- Ensuite drainage and extraction
- Heating, insulation and glazing
Which rules apply in Derry?
Here is what usually applies to a Derry job of this kind. It is general information rather than legal advice, and the NI HMO standards and licence conditions have the final detail.
- 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.
- Doors on protected routes are typically FD30 or FD30S, self-closing on three hinges; emergency lighting is required in HMOs of 4 or more storeys.
- Kitchens, bathrooms and WCs must meet the 2019 living accommodation standard regulations and licence conditions.
How much do extensions for extra rooms cost in Derry?
| 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 Derry follows a site visit.
How long does it take?
Most jobs of this kind take 8–14 weeks. If a council deadline applies in Derry, tell us at the first call so the programme is built around it.
For student houses in Derry, booking by spring is the safest way to make the summer gap.
When do Derry landlords need it?
Typical reasons for this work in Derry:
- A kitchen too small for the number of sharers
- Adding a ground-floor room
Questions about extensions for extra rooms in Derry
Can I extend an HMO under permitted development?
Some extensions to houses are permitted development, but rules differ for HMOs and by nation and council. We check the address before design.
How far do you travel from Derry?
We cover the whole of County Londonderry and work UK-wide. For Derry the nearest towns on our list are Londonderry County Borough (0 miles), Strabane (14 miles), Coleraine (27 miles).
Does a shared house in Derry 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 Derry?
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 Derry
- Londonderry County Borough · 0 mi
- Strabane · 14 mi
- Coleraine · 27 mi
- Omagh · 28 mi
- Ballymena · 42 mi
- Enniskillen · 47 mi
- All of County Londonderry