An HMO loft conversion adds one or two letting rooms, often with an ensuite, in the roof space. For a house in Antrim 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 Antrim, Northern Ireland
- Postcodes
- BT41
- Location
- 14 miles north-west of Belfast
- Pricing region
- Northern Ireland
What do loft conversions for extra rooms in Antrim involve?
- Building control sign-off
- Feasibility and head-height check
- Fire doors and extended alarm system
- Ensuite where space allows
- Dormer or roof windows
Which rules apply in Antrim?
Loft conversions for extra rooms in Antrim 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.
- 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.
- Space and amenity standards come from the HMO (Living Accommodation Standard) Regulations (NI) 2019 and the licence conditions.
How much do loft conversions for extra rooms cost in Antrim?
| Item | UK typical | Local guide | Per |
|---|---|---|---|
| Dormer loft conversion, about 30 m² | £40,000 – £60,000 | £36,000 – £54,000 | project |
| Rooflight loft conversion, about 30 m² | £22,500 – £30,000 | £20,250 – £27,000 | project |
These are typical ranges including VAT, adjusted for Northern Ireland, where costs run below the UK average. The fixed price for a house in Antrim follows a site visit.
How long does it take?
Typical time on site: 6–10 weeks. We agree the programme with you before starting and send photo updates as the work progresses.
When do Antrim landlords need it?
Typical reasons for this work in Antrim:
- A house with usable roof space
- Adding rooms to make an HMO work financially
Questions about loft conversions for extra rooms in Antrim
How much head height do I need?
As a rule of thumb, about 2.2 metres at the highest point of the existing roof space before any work. Less can work with a dormer or lowered ceilings.
Which postcodes in Antrim do you work in?
All of them, including BT41, and the surrounding parts of County Antrim.
Does a shared house in Antrim 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 loft conversions for extra rooms cost in Antrim?
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.
Loft conversions for extra rooms near Antrim
- Ballymena · 10 mi
- Newtownabbey · 13 mi
- Belfast · 14 mi
- Lisburn · 15 mi
- Carrickfergus · 16 mi
- Holywood · 16 mi
- All of County Antrim
Other HMO services in Antrim
- Extensions for extra rooms in Antrim
- Large HMO conversions (7+ sharers) in Antrim
- Escape routes, emergency lighting and fire stopping in Antrim
- Ensuite installation in Antrim
- Layout changes and room reconfiguration in Antrim
- Fire alarm and detection systems in Antrim
- House to HMO conversion in Antrim
- Rewires and EICR remedials in Antrim