Wraparound extensions in Carshalton

Covering Carshalton

Carshalton sits 10 miles south of London, with Sutton 2 miles to the south-west and Mitcham 2 miles to the north.

Homes in London

London projects often mean working on period terraces with neighbours on both sides, tight access through the house and conservation area controls, so careful planning and party wall work matter as much as the build.

What goes into a wraparound extension?

Because it removes two external walls, a wraparound needs careful structural design and a good plan for the corner where the steels meet. We design, apply for any permissions, build and finish the shell, and can fit the kitchen as part of the same contract.

Party wall process with both neighbours if needed
Steel frame or goalpost for the corner opening
Pitched, flat or glazed roof with rooflights

How much should I budget for a wraparound extension?

Use these ranges to budget for wraparound extensions; the survey turns them into a fixed price for the agreed specification.

Wraparound extensions	Guide price incl. VAT
Standard specification	£3,400 to £3,800 per m²
Good specification	£3,800 to £4,250 per m²
High specification	£4,250 to £4,700 per m²

Planning and building rules in Carshalton

In England we deal with the council’s planning team for permission or a lawful development certificate, with building control (the council or a registered building control approver) for inspections, and with neighbours under the Party Wall etc. Act 1996 where it applies.

In England a wraparound extension is treated as one extension, and because it covers both the side and the rear it does not normally fit within permitted development.

What can affect a wraparound extension?

Both neighbours may need party wall notices.
An open-plan space this size needs a heating plan, often underfloor heating.

From first call to completion

Send us the details. Give us a postcode, a rough idea of size and some photos, by phone, form or the guide price tool.
Free site visit. We measure up, look at access, drains and the structure, and talk through options and budget.
Design and fixed price. You get drawings and a written price for the agreed specification before anything is ordered.
Build and hand over. Our teams build to the programme, building control inspects, and you get the completion paperwork at the end.

What people ask before starting

How much does a wraparound extension cost?

Typically £3,400 to £4,700 per square metre including VAT. Many come in between £85,000 and £120,000 before the kitchen.

Does a wraparound need planning permission?

Usually yes. In England it combines a side and rear extension, which takes it outside permitted development in most cases.

Do you work in Carshalton?

Yes. Carshalton is within our coverage for wraparound extensions, along with nearby Sutton and Mitcham.

Other towns nearby

Learn more about wraparound extensions, or see every project we cover in Carshalton.