Belfast, County Antrim
Kitchen-diner rear extension in Belfast
We plan and build kitchen-diner rear extensions for homeowners in Belfast. An open-plan kitchen, dining and family room that opens straight onto the garden. Start with a free site visit, then a written price once the design is agreed.
Belfast and its postcode districts BT3, BT5, BT7 and BT9 are part of our County Antrim coverage. We usually keep the working kitchen where the old one was and put the dining table in the new space by the doors, which suits most Belfast homes.
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 Belfast?
Guide prices for a kitchen-diner rear extension in Belfast start from our Northern Ireland rate of £1,650–£2,700 per square metre, including VAT. 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 |
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 kitchen-diner rear extension in Belfast?
Here is how the rules in Northern Ireland apply to a kitchen-diner rear extension in Belfast.
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 Belfast like to extend?
Belfast has terraces near the centre, semis on the edges and many detached houses and bungalows in the surrounding countryside, where plots are often generous.
How a kitchen-diner rear extension in Belfast 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.
Options and costs
We draw layout options and price each one, so the budget shapes the design rather than surprising you later.
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.
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.
Kitchen-diner rear extensions near Belfast
Close by, we work in Castlereagh, about 2.3 miles away, and Newtownabbey, about 4.4 miles away.
- Kitchen-diner rear extension in Castlereagh
- Kitchen-diner rear extension in Newtownabbey
- Kitchen-diner rear extension in Holywood
- Kitchen-diner rear extension in Dundonald
- Kitchen-diner rear extension in Lisburn
Other work in Belfast:
FAQ
Kitchen-diner rear extension questions in Belfast
How long does a rear extension take to build in Belfast?
Most single-storey rear extensions take 10 to 16 weeks on site and two-storey extensions 16 to 26 weeks, after design and approvals.
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.
How big should a kitchen-diner be?
Around 25 to 35 m² for the combined kitchen, dining and seating areas suits most family homes. Your survey shows what fits the house.
Do I need planning permission for a rear extension in Belfast?
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.
Will I need a structural engineer?
Yes for the beam over the new opening and usually the foundations; we arrange them and their calculations go to building control.
What postcode areas do you cover around Belfast?
Including BT3, BT5, BT7, BT9, BT11 and BT13, and the surrounding County Antrim area.