Newtownabbey, County Antrim
Two-storey rear extension in Newtownabbey
We plan and build two-storey rear extensions for homeowners in Newtownabbey. A larger kitchen downstairs and an extra bedroom or bathroom upstairs, under one roof. Start with a free site visit, then a written price once the design is agreed.
We cover Newtownabbey (BT36 and BT37) as part of our County Antrim work. Two-storey rear extensions suit semi-detached houses in Newtownabbey best, where the extra bedroom matters as much as the bigger kitchen.
Book a free site visit
Tell us about the house and we'll call to arrange a free, no-obligation visit.
How much does a two-storey rear extension cost in Newtownabbey?
A two-storey rear extension in Newtownabbey is priced at £1,570–£2,350 per square metre including VAT as a guide, before kitchen fit-out and fees. Northern Ireland prices are the lowest in our range.
| Size | Guide price inc VAT |
|---|---|
| 3 m × 5 m footprint, two floors (30 m²) | £47,000–£70,500 |
| 4 m × 6 m footprint, two floors (48 m²) | £75,000–£113,000 |
We put a fixed price in writing once the design is agreed, and explain any provisional sums such as foundations.
Do you need planning permission for a two-storey rear extension in Newtownabbey?
Planning for a two-storey rear extension in Newtownabbey follows the Northern Irish householder rules.
In Northern Ireland a rear extension of more than one storey can be permitted development if it projects no more than 3 metres and stays at least 7 metres from the rear boundary. Two-storey extensions in conservation areas, and most larger schemes, need planning permission from the council.
Conservation areas, Areas of Outstanding Natural Beauty and listed buildings restrict permitted development in Northern Ireland. We check your house's planning history and any conservation area before drawing, so the route is clear before you spend on plans.
What are homes in Newtownabbey like to extend?
Semis and detached houses are typical of Newtownabbey, and many have room for a rear extension within Northern Ireland's permitted development limits.
How a two-storey rear extension in Newtownabbey comes together
Survey visit
We visit free of charge, measure up, check access, drainage and neighbours' extensions, and note what you want the room to do.
Design and guide price
Two or three layout options with a guide price for each, so you choose the design knowing what it costs.
Paperwork handled
Planning or permitted development, building control approval, structural design and neighbour agreements are all handled by us.
Written price, then build
Once the design and approvals are in place, you get a fixed written price and programme, and we build through to sign-off.
Two-storey rear extensions near Newtownabbey
Neighbouring places we cover include Holywood (3.7 miles) and Belfast (4.4 miles).
- Two-storey rear extension in Holywood
- Two-storey rear extension in Belfast
- Two-storey rear extension in Carrickfergus
- Two-storey rear extension in Castlereagh
- Two-storey rear extension in Dundonald
Other work in Newtownabbey:
FAQ
Two-storey rear extension questions in Newtownabbey
Do I need planning permission for a rear extension in Newtownabbey?
Often not for a single-storey rear extension of up to 3 metres (4 metres detached) under Northern Ireland's permitted development rules, outside conservation areas.
Can you match the brick or stone on my Newtownabbey house?
We source the closest match and show you samples before ordering; reclaimed materials are often the best match on older houses.
Does a two-storey rear extension need planning permission?
Almost always. England and Northern Ireland allow 3 metres without an application only if at least 7 metres remains to the rear boundary; Wales and Scotland are similar or stricter.
Is the site visit in Newtownabbey free?
Yes. We visit, measure up and talk through the options with no cost and no obligation.
Can I live at home while the extension is built?
Usually yes. Most of the work is outside until the back wall is opened near the end, and that stage is screened off.
Do I need a party wall agreement?
Northern Ireland has no Party Wall Act; we agree any shared-wall work with your neighbour in writing.