Castlereagh, County Down
Kitchen-diner rear extension in Castlereagh
An open-plan kitchen, dining and family room that opens straight onto the garden. We design, get the approvals for and build kitchen-diner rear extensions in Castlereagh and the surrounding area, with one contract from the first survey to building control sign-off.
We cover Castlereagh (BT8) as part of our County Down work. For Castlereagh kitchens we plan the extraction route and the island drainage before the slab is poured, so nothing has to be chased in later.
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 kitchen-diner rear extension cost in Castlereagh?
For Castlereagh we work from the Northern Ireland rate: £1,650–£2,700 per square metre of new floor, including VAT, standard specification. Northern Ireland prices are the lowest in our range.
| Size | Guide price inc VAT |
|---|---|
| 3 m wide × 4 m deep (12 m²) | £20,000–£32,500 |
| 4 m wide × 5 m deep (20 m²) | £33,000–£54,000 |
| 4 m wide × 6 m deep (24 m²) | £39,500–£64,500 |
Ground conditions, glazing, the roof and how far the house is opened up move the final figure within the range.
Do you need planning permission for a kitchen-diner rear extension in Castlereagh?
The planning route for a kitchen-diner rear extension in Castlereagh is set by Northern Ireland's householder rules and your council.
In Northern Ireland the Planning (General Permitted Development) Order (Northern Ireland) 2015 allows a single-storey rear extension of up to 3 metres on an attached house or 4 metres on a detached house, no higher than 4 metres, with eaves no higher than 3 metres within 2 metres of a boundary. Building control approval from the council is still required.
Northern Ireland has no larger-extension prior approval route; anything beyond permitted development needs a planning application.
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 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 kitchen-diner rear 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.
Drawings and budget
Floor plans and elevations for the options, each with a guide price.
Planning and regulations
We take the design through the right planning route, then produce the construction drawings and engineer's calculations for council building control.
Build and sign-off
We build to the approved drawings with regular updates, then hand over the building control completion certificate and any guarantees from suppliers.
Kitchen-diner rear extensions near Castlereagh
From Castlereagh, the nearest places we also cover are Belfast (2.3 miles) and Dundonald (3.7 miles).
- Kitchen-diner rear extension in Belfast
- Kitchen-diner rear extension in Dundonald
- Kitchen-diner rear extension in Holywood
- Kitchen-diner rear extension in Newtownabbey
- Kitchen-diner rear extension in Lisburn
Other work in Castlereagh:
FAQ
Kitchen-diner rear extension questions in Castlereagh
How much does a kitchen-diner rear extension cost in Castlereagh?
As a guide, £1,650–£2,700 per square metre including VAT for a standard specification. For example, 3 m wide × 4 m deep (12 m²): about £20,000–£32,500 at that rate. Your written price follows the survey.
How long does a rear extension take to build in Castlereagh?
Most single-storey rear extensions take 10 to 16 weeks on site and two-storey extensions 16 to 26 weeks, after design and approvals.
Where does the cooker extraction go?
Through the new wall or roof, ducted to outside. Recirculating hoods are possible but less effective.
Is the site visit in Castlereagh free?
Yes. We visit, measure up and talk through the options with no cost and no obligation.
What postcode areas do you cover around Castlereagh?
Including BT8, and the surrounding County Down area.
Can I get a price without a visit?
Our online guide-price tool gives a range in a couple of minutes. A written price needs a survey.