Wraparound extensions in Purley

Covering Purley

Alongside Purley, we also cover Coulsdon, South Croydon (2 miles to the north-east) and Carshalton.

Homes in London

Terraced houses dominate many London neighbourhoods, so most projects involve shared walls, narrow access and a party wall process. Conservation areas are widespread, and some boroughs have their own mansard and basement guidance.

What does a wraparound extension involve?

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.

Steel frame or goalpost for the corner opening
Pitched, flat or glazed roof with rooflights
Optional kitchen supply and installation

How much does a wraparound extension cost in Purley?

Indicative costs for wraparound extensions. London and the South East usually sit towards the top of each range.

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

What approvals does a wraparound extension need in England?

Projects in England go through two separate checks. Planning (or confirmation that the work is permitted development) comes from the district, borough or unitary council, and building regulations approval comes from the council’s building control team or a registered building control approver. Where work touches a shared wall or digs near a neighbour’s foundations, the Party Wall etc. Act 1996 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 should Purley homeowners check first?

Roof water from an L-shape needs careful falls and outlets.
An open-plan space this size needs a heating plan, often underfloor heating.

What are the steps?

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.
Price and paperwork. The design is priced line by line, and we submit the planning and building control applications.
We build it. Work follows an agreed programme, with inspections at each stage and a final sign-off.

What people ask before starting

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.

How long does a wraparound take?

Around 12 to 18 weeks on site after approvals.

Do you work in Purley?

Yes. Purley is within our coverage for wraparound extensions, along with nearby Coulsdon and South Croydon.

Also covering

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