Bangor, County Down
Two-storey rear extension in Bangor
A larger kitchen downstairs and an extra bedroom or bathroom upstairs, under one roof. We design, get the approvals for and build two-storey rear extensions in Bangor and the surrounding area, with one contract from the first survey to building control sign-off.
We cover Bangor (BT19 and BT20) as part of our County Down work. Two-storey rear extensions suit semi-detached houses in Bangor 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 Bangor?
In Bangor, our guide for a two-storey rear extension is £1,570–£2,350 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 × 5 m footprint, two floors (30 m²) | £47,000–£70,500 |
| 4 m × 6 m footprint, two floors (48 m²) | £75,000–£113,000 |
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 two-storey rear extension in Bangor?
The planning route for a two-storey rear extension in Bangor is set by Northern Ireland's householder rules and your council.
Northern Ireland's 2015 Order allows a two-storey rear extension of up to 3 metres where at least 7 metres is left to the rear boundary. Anything larger, or in a conservation area, needs a planning application to 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 Bangor like to extend?
Bangor 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 two-storey rear extension in Bangor 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.
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 Bangor
Close by, we work in Newtownards, about 4.8 miles away, and Holywood, about 6.4 miles away.
- Two-storey rear extension in Newtownards
- Two-storey rear extension in Holywood
- Two-storey rear extension in Carrickfergus
- Two-storey rear extension in Dundonald
- Two-storey rear extension in Newtownabbey
Other work in Bangor:
FAQ
Two-storey rear extension questions in Bangor
What postcode areas do you cover around Bangor?
Including BT19 and BT20, and the surrounding County Down area.
How long does a rear extension take to build in Bangor?
Most single-storey rear extensions take 10 to 16 weeks on site and two-storey extensions 16 to 26 weeks, after design and approvals.
Will we need to move out?
Rarely. The first-floor opening is made late in the job and sealed with temporary screens.
Do I need planning permission for a rear extension in Bangor?
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.
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.
How much does a two-storey rear extension cost in Bangor?
As a guide, £1,570–£2,350 per square metre including VAT for a standard specification. For example, 3 m × 5 m footprint, two floors (30 m²): about £47,000–£70,500 at that rate. Your written price follows the survey.