Downpatrick, County Down
Two-storey rear extension in Downpatrick
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 Downpatrick and the surrounding area, with one contract from the first survey to building control sign-off.
Downpatrick and its postcode districts BT30 are part of our County Down coverage. In Downpatrick, a two-storey rear extension is worth comparing with the cost of moving once stamp duty, agents' and legal fees are counted.
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 Downpatrick?
In Downpatrick, 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 |
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 two-storey rear extension in Downpatrick?
Here is how the rules in Northern Ireland apply to a two-storey rear extension in Downpatrick.
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. 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 Downpatrick like to extend?
Downpatrick 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 Downpatrick 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.
Drawings and budget
Floor plans and elevations for the options, each with a guide price.
Approvals
Permitted development check or planning application, then building control drawings to the Northern Ireland Technical Booklets and structural calculations, plus a written agreement with neighbours for any shared-wall work.
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.
Two-storey rear extensions near Downpatrick
Close by, we work in Castlereagh, about 18.3 miles away, and Newtownards, about 18.3 miles away.
- Two-storey rear extension in Castlereagh
- Two-storey rear extension in Newtownards
- Two-storey rear extension in Dundonald
- Two-storey rear extension in Lisburn
- Two-storey rear extension in Belfast
Other work in Downpatrick:
FAQ
Two-storey rear extension questions in Downpatrick
Do I need planning permission for a rear extension in Downpatrick?
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.
What postcode areas do you cover around Downpatrick?
Including BT30, and the surrounding County Down area.
Does a two-storey rear extension need planning permission?
Almost always. England and Northern Ireland allow 3 metres without an application only if at least 7 metres remains to the rear boundary; Wales and Scotland are similar or stricter.
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.
Can you match the brick or stone on my Downpatrick house?
We source the closest match and show you samples before ordering; reclaimed materials are often the best match on older houses.
Do you handle building control in Downpatrick?
Yes. We apply to the council's building control team and hand over the completion certificate.