Castlereagh, County Down
Wraparound extension in Castlereagh
We plan and build wraparound extensions for homeowners in Castlereagh. An L-shaped extension that fills the side return and runs across the back. Start with a free site visit, then a written price once the design is agreed.
Castlereagh is covered from our County Down round, including BT8. In Castlereagh we usually draw the wraparound and a simpler rear-only option side by side, so the planning risk and cost difference are clear.
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 wraparound extension cost in Castlereagh?
A wraparound extension in Castlereagh is priced at £1,910–£3,130 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 |
|---|---|
| L-shaped, about 22 m² of new floor | £42,000–£69,000 |
| L-shaped, about 30 m² of new floor | £57,500–£94,000 |
Your written price follows a measured survey and an agreed design, so it reflects your house, not an average.
Do you need planning permission for a wraparound extension in Castlereagh?
Here is how the rules in Northern Ireland apply to a wraparound extension in Castlereagh.
In Northern Ireland side extensions that face a road, or go beyond permitted development limits, need planning permission from the council, and most wraparounds go through a planning application.
Northern Ireland has no Party Wall Act. Shared-wall work relies on agreement with your neighbour and the general law, so we put access and protection arrangements in writing before starting.
Conservation areas, Areas of Outstanding Natural Beauty and listed buildings restrict permitted development in Northern Ireland. At the first visit we measure what is there now and tell you which route fits: permitted development or a planning application.
What are homes in Castlereagh like to extend?
Semis and detached houses are typical of Castlereagh, and many have room for a rear extension within Northern Ireland's permitted development limits.
How a wraparound extension in Castlereagh comes together
Free site visit
We measure the house and garden, look at the back wall, drainage and boundaries, and talk through what you want from the space.
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.
Wraparound extensions near Castlereagh
From Castlereagh, the nearest places we also cover are Belfast (2.3 miles) and Dundonald (3.7 miles).
- Wraparound extension in Belfast
- Wraparound extension in Dundonald
- Wraparound extension in Holywood
- Wraparound extension in Newtownabbey
- Wraparound extension in Lisburn
Other work in Castlereagh:
FAQ
Wraparound extension questions in Castlereagh
Who will build my extension?
Vetted building teams working under contract to us. Your contract is with S&K Property Investments and Improvement Ltd for the design and the build.
Can you match the brick or stone on my Castlereagh house?
We source the closest match and show you samples before ordering; reclaimed materials are often the best match on older houses.
Will it take a lot of garden?
Less than a deep rear extension of the same area, because part of the space comes from the side passage.
Do I need planning permission for a rear extension in Castlereagh?
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.
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.
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.