Wraparound extensions in Farnworth
If you live in Farnworth and want more space without moving, a wraparound extension is one of the most practical ways to get it. We handle the drawings, approvals and the build.
- Guide price in FarnworthFrom £34,000 inc VAT
- PlanningUsually a householder application
- Build time14–20 weeks on site
- Postcode districtsBL3, BL4, M38
What we take care of
- Householder planning application
- Party wall notice support (England and Wales)
- Foundations, drainage and any manhole relocation
- Full internal finish or kitchen-ready shell
Extensions in and around Farnworth
Our survey diary covers Farnworth, including BL3, BL4, M38. The same team covers Walkden (2 miles), Bolton (3 miles), Radcliffe (3 miles), Tyldesley (4 miles), all within easy reach.
Golborne, in Merseyside, is roughly 10 miles from Farnworth and also on our list. The North West has a high share of Victorian and Edwardian terraces with rear yards and outriggers, plus large areas of inter-war semis in the suburbs.
How much does a wraparound extension cost in Farnworth?
Labour and material costs vary across the UK, so for Farnworth we use our North West England factor (×0.95). The ranges include VAT and exclude design, structural and council fees.
Typical rates in Farnworth: £1,900 to £3,520 per m² including VAT, depending on specification.
| Size | Essential | Standard | Premium |
|---|---|---|---|
| Compact L-shape 18 m² | £34,000 – £41,500 | £39,000 – £50,000 | £49,500 – £63,500 |
| Medium L-shape 25 m² | £47,500 – £57,000 | £54,500 – £69,000 | £68,500 – £88,000 |
| Large L-shape 32 m² | £60,500 – £73,000 | £69,500 – £88,500 | £88,000 – £112,500 |
Try the guide-price tool to see a range for your own size and finish.
Do I need planning permission in Farnworth?
In England a wraparound extension is assessed as both a side and a rear extension, and the combination usually falls outside permitted development, so most need a householder planning application (£548 from 1 April 2026).
Homes in conservation areas, national parks, National Landscapes (formerly AONBs), the Broads and World Heritage Sites have tighter rules, so we always check the property's status and planning history before design starts.
Building regulations approval is separate from planning. In England you can use the council's building control team or a registered building control approver; a full plans application gets the drawings checked before work starts, and the inspector signs the work off with a completion certificate.
Applications are decided by the local planning authority (your district, borough or unitary council).
From first visit to completion
Site visits are free and there is no obligation. Where drawings are needed, the design stage is priced in writing before it starts.
Free site visit
First, a site visit: we look at the house, garden, access and drains and listen to what you need.
Design and approvals
Once the layout is agreed, we deal with the council: planning permission or written confirmation that none is needed, plus building control.
Fixed written price
We confirm the build price in writing, based on the approved drawings and the finishes you have chosen.
Build and sign-off
Our team builds the extension, keeps you updated weekly and finishes with building control sign-off.
Questions people ask about wraparound extensions
Who do I contract with for a wraparound extension in Farnworth?
Your contract is with S&K Property Investments and Improvement Ltd, which designs and manages the project and the build teams who carry it out.
Do you cover all of Farnworth?
Yes. We cover Farnworth and the surrounding parts of Greater Manchester. Site visits are free and there is no obligation.
Can I see a price before committing to anything?
Yes. The guide prices on this page are adjusted for Farnworth, and the guide-price tool gives a range for your own size. After the survey you get a written price before anything is agreed.
Do wraparound extensions need planning permission?
Usually, yes. In England the side element counts as a side extension and the rear element as a rear extension, and the combination normally falls outside permitted development. A householder application costs £548 in England from 1 April 2026.
How much does a wraparound extension cost?
Our guide range is about £1,900 to £3,520 per m² including VAT. A 25 m² standard-spec wraparound typically lands around £54,500 to £69,000 in Farnworth before design and council fees.
Book a free site visit in Farnworth
We will measure up, check the planning position and give you honest guide figures.
- Free, no-obligation site visit
- Planning route checked before you spend on drawings
- Written price once the design is agreed
- Building control sign-off at the end
Prefer to talk? Call 0800 088 6341 or .
Book a free site visit
Tell us a little about the project and we will arrange a time.