Two-storey wraparound extensions in Larne

Before you start in Larne, here's what applies.

Postcode districts: BT40
County / area: County Antrim, Northern Ireland
Price region: Northern Ireland
Guide price: £106,000–£145,500 (£1,890–£2,600 per m²)
Approval route: Planning permission is usually needed.
Nearest towns: Carrickfergus (9.3 miles), Ballyclare (10 miles), Greenisland (10.6 miles)
Distance to Belfast: about 18 miles
First visit: Free, no obligation

About a two-storey wraparound extension

A two-storey wraparound extension suits a house with space both beside it and behind it, where you want to transform the layout rather than add a single room. You get one design for the whole L-shape, the planning application, structural design for the corner and the openings into the house, building regulations approval and the build, managed by us and carried out by vetted teams working under S&K.

Larne sits about 18.0 miles from Belfast. Closer to home, Carrickfergus is 9.3 miles away and Ballyclare 10.0 miles.

What it costs in Larne

Guide prices for two-storey wraparound extensions in Northern Ireland are around £1,890–£2,600 per m² of new floor space, including VAT. For a typical project with an L-shaped footprint of about 28 m² wrapping the side and rear, on two floors (56 m² of new floor space), that's roughly £106,000–£145,500. Kitchens, bathroom fittings and flooring are priced separately so you can compare like with like.

Spec	Per m²	An L-shaped footprint of about 28 m² wrapping the side and rear, on two floors (56 m² of new floor space)
Essential	£1,740–£2,390 per m²	£97,500–£133,500
Standard	£1,890–£2,600 per m²	£106,000–£145,500
Premium	£2,270–£3,120 per m²	£127,000–£174,500

Planning and building control in Larne

In Northern Ireland, the permitted development allowance for two-storey extensions covers rear extensions of up to 3 m that stay 7 m from the rear boundary. A wraparound adds a side element on two floors, so it normally needs a planning application. The fee is £347 per dwelling, and councils aim for an average of 15 weeks for local applications.

Approval in Northern Ireland: Planning application for works to a house: £347. Councils aim to decide local applications within an average of 15 weeks; many take longer.

Building control: Building control approval from the local council under the Building Regulations (Northern Ireland), using the Technical Booklets.

Design points for Larne homes

Two roofs that meet

A wraparound needs the side roof and rear roof to join cleanly, often with a valley or hip where they meet. Getting pitches and ridge heights right keeps rainwater moving and avoids a bulky mass at the back corner, which neighbours and planners notice.

Phasing the build

A wraparound touches two sides of the house at once, so the kitchen and often the rear rooms are out of use for part of the build. We plan the sequence so you keep a working kitchen and bathroom for as long as possible, or advise when moving out briefly makes sense.

How we'd run your project

Free site visit
We visit your home in Larne, look at the structure, access and boundaries, and talk through what you want the new rooms to do.
Drawings, then consent
We draw the scheme, check it against the rules in Northern Ireland, and take it through the right consent with the council.
Engineer it
Foundations sized for two floors, steels for any openings, and building control approval, all before anyone starts on site.
Build it
The new structure goes up first, then we open into the house, finish inside and get the completion certificate.

Questions about two-storey wraparound extensions in Larne

Who handles building control for a project in Larne?

We handle it as part of the project. What's needed in Northern Ireland: building control approval from the local council under the Building Regulations (Northern Ireland), using the Technical Booklets. We prepare the drawings and the engineer's calculations, book the inspections and pass you the completion paperwork at the end.

How long does a two-storey wraparound extension take?

Allow 4 to 8 weeks for survey and design, then the approval period (councils aim to decide local applications within an average of 15 weeks; many take longer), then 4 to 8 weeks of technical design, which can overlap. The build itself usually takes 14 to 20 weeks, longer for large or complex designs.

Which postcodes do you cover around Larne?

We cover Larne (BT40) and nearby places including Carrickfergus, Ballyclare and Greenisland, plus the rest of County Antrim. The first site visit is free.

Is a wraparound extension better than separate side and rear extensions?

Building both at once usually costs less than two separate projects, because you pay for one set-up, one scaffold, one roof junction and one set of approvals. It also lets the layout be designed as a whole. The trade-off is a larger single outlay and a longer build, often 16 to 24 weeks at this size.

Does a wraparound extension need steel?

Almost always. Opening the corner of the house and the old rear wall to make one open-plan space means steel beams, and often a steel post or frame at the outside corner. The structural engineer sizes these, and the steel is ordered once the design is fixed, which is one reason a wraparound needs careful sequencing.

Nearby

We also cover places near Larne, including:

Other extensions in Larne

All two-storey extension services in Larne · Two-storey wraparound extensions across County Antrim

Ready to talk it through? Call us or send the form and we'll arrange a visit to your home in Larne.