Rear extension design, approvals and build across the UKCall 0800 088 6341 · Online guide price
Rear Extensionsrear-extensions.co.uk 0800 088 6341 Get a guide price

Dundonald, County Down

Rear extension planning drawings in Dundonald

Measured survey, design options, planning drawings and the application, handled for you. If you live in Dundonald and want to know what a rear extension would cost and whether it needs planning, start with the online guide price or a free site visit.

We cover Dundonald (BT16) as part of our County Down work. Planning applications in Dundonald go to the local planning authority covering Dundonald, and we check its local design guidance for rear extensions before drawing.

Book a free site visit

Tell us about the house and we'll call to arrange a free, no-obligation visit.

What do rear extension planning drawings cost in Dundonald?

As a guide, £1,000–£2,500 including VAT for a single-storey rear extension, or £2,000–£3,500 for a two-storey scheme. Planning fees in Northern Ireland are set by the Department for Infrastructure; we confirm the current householder fee when we submit. 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 rear extension in Dundonald?

Here is how the rules in Northern Ireland apply to a rear extension in Dundonald.

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.

Northern Ireland councils work to a 15-week target for local applications, which include householder extensions; many householder decisions come sooner.

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?

Dundonald 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 rear extension in Dundonald comes together

  1. Survey visit

    We visit free of charge, measure up, check access, drainage and neighbours' extensions, and note what you want the room to do.

  2. Design and guide price

    Two or three layout options with a guide price for each, so you choose the design knowing what it costs.

  3. 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.

  4. 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.

Rear extension planning drawings near Dundonald

We also build rear extensions in nearby Holywood (3.4 miles) and Castlereagh (3.7 miles).

Other work in Dundonald:

All rear extensions in Dundonald

FAQ

Rear extension planning drawings questions in Dundonald

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.

How long does a rear extension take to build in Dundonald?

Most single-storey rear extensions take 10 to 16 weeks on site and two-storey extensions 16 to 26 weeks, after design and approvals.

Do neighbours get consulted?

Yes for a full application: the council writes to them or puts up a site notice.

Do you handle building control in Dundonald?

Yes. We apply to the council's building control team and hand over the completion certificate.

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.

Can you match the brick or stone on my Dundonald house?

We source the closest match and show you samples before ordering; reclaimed materials are often the best match on older houses.

Next step

See what your rear extension would cost

Get a guide price online in a couple of minutes, or book a free site visit and we'll measure up and talk you through the planning route.

CallGuide price