Two-storey wraparound extensions in Alexandria

Quick reference for homeowners in Alexandria.

Postcode districts: G83
County / area: Glasgow and Dunbartonshire, Scotland
Price region: Scotland
Guide price: £113,000–£155,500 (£2,020–£2,770 per m²)
Approval route: Planning permission is usually needed: Class 1B permitted development only applies if every part of the extension is at least 10 m from all boundaries. A building warrant is needed before work starts.
Nearest towns: Bonhill (1.3 miles), Vale of Leven (1.6 miles), Dumbarton (3.5 miles)
Distance to Glasgow: about 15.5 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, a building warrant and the build, managed by us and carried out by vetted teams working under S&K.

Alexandria sits about 15.5 miles from Glasgow. Closer to home, Bonhill is 1.3 miles away and Vale of Leven 1.6 miles.

What it costs in Alexandria

Expect a two-storey wraparound extension in Alexandria to land somewhere around £113,000–£155,500 for an L-shaped footprint of about 28 m² wrapping the side and rear, on two floors (56 m² of new floor space). Our Scotland guide rate is £2,020–£2,770 per m², including VAT. Professional fees for drawings and the structural engineer are listed separately on our prices page.

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	£1,860–£2,550 per m²	£104,000–£143,000
Standard	£2,020–£2,770 per m²	£113,000–£155,500
Premium	£2,430–£3,330 per m²	£136,000–£186,500

Planning and building standards in Alexandria

In Scotland, a two-storey wraparound would need to be at least 10 m from every boundary to be permitted development under Class 1B, and not on an elevation fronting a road. That is rarely possible, so plan for a householder planning application, which costs £371 and is decided within two months, followed by a building warrant before work starts.

Approval in Scotland: Householder planning application: £371. Councils have two months to decide a local planning application.

Building standards: A building warrant from the council's building standards service before work starts, and a completion certificate at the end. Scotland uses its own Technical Handbooks.

Design points for Alexandria homes

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.

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.

How we'd run your project

Start at your house
We come to your home in Alexandria, measure up, check the ground floor walls and roof structure, and note anything near the boundaries.
Design and approvals
We draw the extension and check it against the rules for Scotland, then apply for planning permission or a certificate of lawfulness, whichever fits.
Detail and price
Construction drawings, engineer's calculations and building warrant approval, then a written fixed price for the build.
Build and hand over
We manage the build from groundworks to decoration-ready finish and hand over with the completion paperwork.

Questions about two-storey wraparound extensions in Alexandria

Do I need planning permission for a two-storey wraparound extension in Alexandria?

Alexandria is in Scotland. Planning permission is usually needed: Class 1B permitted development only applies if every part of the extension is at least 10 m from all boundaries. A building warrant is needed before work starts.

Which postcodes do you cover around Alexandria?

We cover Alexandria (G83) and nearby places including Bonhill, Vale of Leven and Dumbarton, plus the rest of Glasgow and Dunbartonshire. The first site visit is free.

How long does a two-storey wraparound extension take?

Allow 4 to 8 weeks for survey and design, then the approval period (councils have two months to decide a local planning application), 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.

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.

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.

Nearby

Nearby towns we cover for two-storey wraparound extensions:

Other extensions in Alexandria

All two-storey extension services in Alexandria · Two-storey wraparound extensions across Glasgow and Dunbartonshire

The quickest next step is a visit. We'll look at your house in Alexandria and give you an honest view of the options.