Dundonald, County Down
Single-storey rear extension in Dundonald
Thinking about a single-storey rear extension in Dundonald? Ground-floor space across the back of the house, usually for a kitchen, dining or family room. Our team handles the drawings, the planning route and the build, and your contract is with one company throughout.
Dundonald sits in County Down, with postcode districts including BT16. A single-storey rear extension in Dundonald is mostly built from the garden side, so the house stays usable for most of the job.
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 single-storey rear extension cost in Dundonald?
In Dundonald, our guide for a single-storey rear extension is £1,650–£2,700 per square metre including VAT for a 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 |
These are guide ranges; the written quote after the survey is the figure that counts.
Do you need planning permission for a single-storey rear extension in Dundonald?
The planning route for a single-storey rear extension in Dundonald is set by Northern Ireland's householder rules and your council.
Northern Ireland's permitted development rules allow a single-storey rear extension of 3 metres on terraced and semi-detached houses and 4 metres on detached houses, with a 4 metre height limit. Listed buildings, conservation areas and houses with removed rights need planning permission from the council.
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 Dundonald like to extend?
Semis and detached houses are typical of Dundonald, and many have room for a rear extension within Northern Ireland's permitted development limits.
How a single-storey rear extension in Dundonald comes together
Look round and measure
A free visit to see the back of the house, measure it, check the drains and boundaries and hear what you need.
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.
Fixed price and build
A written price for the agreed design, a start date and a named contact through the build, ending with the building control completion certificate.
Single-storey rear extensions near Dundonald
Neighbouring places we cover include Holywood (3.4 miles) and Castlereagh (3.7 miles).
- Single-storey rear extension in Holywood
- Single-storey rear extension in Castlereagh
- Single-storey rear extension in Newtownards
- Single-storey rear extension in Belfast
- Single-storey rear extension in Newtownabbey
Other work in Dundonald:
FAQ
Single-storey rear extension questions in Dundonald
Is the site visit in Dundonald free?
Yes. We visit, measure up and talk through the options with no cost and no obligation.
What postcode areas do you cover around Dundonald?
Including BT16, and the surrounding County Down area.
Can I stay in the house during the build?
Usually yes. The noisiest, dustiest stage, removing the back wall, is kept to the final weeks and screened off. Most families set up a temporary kitchen elsewhere in the house.
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.
Do I need planning permission for a rear extension in Dundonald?
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.