Covering Chiswick
Our coverage around Chiswick (W4) also includes Acton, Barnes and Shepherd's Bush.
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 do you get with a wraparound extension?
A wraparound extension combines a side return and a rear extension into one L-shaped build, giving the biggest possible ground-floor space on terraced and semi-detached houses. It usually creates a large open-plan kitchen, dining and living area across the back of the house.
- Steel frame or goalpost for the corner opening
- Glazing, insulation, plastering and electrics
- Optional kitchen supply and installation
How much should I budget for a wraparound extension?
Typical ranges for wraparound extensions. Ground conditions, access and specification move the final figure, which we fix in writing before work starts.
| 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 Chiswick
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. Most need householder planning permission, which usually takes around eight weeks once validated.
What should I think about before starting?
- The corner steel connection is the critical detail and is designed by a structural engineer.
- 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.
- Survey at your house. We look at the existing structure, services and access, and agree what the design needs to achieve.
- Drawings, approvals, written quote. We prepare the design, apply for the approvals it needs, and give you a fixed price in writing.
- Construction and completion. One site lead co-ordinates every trade through to the building control certificate.
Wraparound extensions: common questions
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.
How long does a wraparound take?
Around 12 to 18 weeks on site after approvals.
How do I get a price for wraparound extensions in Chiswick?
Use the guide price tool for a ballpark figure, then book a visit for a fixed written price for the agreed specification.
Wraparound extensions near Chiswick
- Wraparound extensions in Acton
- Wraparound extensions in Barnes
- Wraparound extensions in Shepherd's Bush
- Wraparound extensions in Notting Hill
Learn more about wraparound extensions, or see every project we cover in Chiswick.