Farnworth, Greater Manchester
Two-storey rear extension in Farnworth
A larger kitchen downstairs and an extra bedroom or bathroom upstairs, under one roof. We design, get the approvals for and build two-storey rear extensions in Farnworth and the surrounding area, with one contract from the first survey to building control sign-off.
Farnworth and its postcode districts BL2, BL3 and BL4 are part of our Greater Manchester coverage. In Greater Manchester we check the neighbours' rear windows first, because the upper floor is where most two-storey schemes win or lose planning.
Book a free site visit
Tell us about the house and we'll call to arrange a free, no-obligation visit.
How much does a two-storey rear extension cost in Farnworth?
A two-storey rear extension in Farnworth is priced at £1,690–£2,540 per square metre including VAT as a guide, before kitchen fit-out and fees. North West prices sit below our West Midlands baseline; access on terraced streets is the main variable.
| Size | Guide price inc VAT |
|---|---|
| 3 m × 5 m footprint, two floors (30 m²) | £51,000–£76,000 |
| 4 m × 6 m footprint, two floors (48 m²) | £81,000–£122,000 |
We put a fixed price in writing once the design is agreed, and explain any provisional sums such as foundations.
Do you need planning permission for a two-storey rear extension in Farnworth?
Here is how the rules in England apply to a two-storey rear extension in Farnworth.
England's rules allow a rear extension of more than one storey without an application only when it is no deeper than 3 metres and at least 7 metres from the boundary opposite the rear wall, and never on designated land. Most two-storey schemes need householder planning permission.
Conservation areas, National Parks, National Landscapes and the Broads restrict permitted development, and listed buildings always need listed building consent. Before any drawing we look up the property's history with the council, because earlier extensions and removed rights change the answer.
What are homes in Farnworth like to extend?
Stone and brick terraces are common around Farnworth. Where houses back onto a ginnel or alley, deliveries can come in from the rear, which makes the build tidier.
How a two-storey rear extension in Farnworth comes together
Look round and measure
A free visit to see the back of the house, measure it, check the drains and boundaries and hear what you need.
Options and costs
We draw layout options and price each one, so the budget shapes the design rather than surprising you later.
Approvals
Permitted development check, prior approval or planning application, then Building Regulations drawings and structural calculations, plus party wall notices where they apply.
Fixed price and build
A written price for the agreed design, a start date and a named contact through the build, ending with the building control completion certificate.
Two-storey rear extensions near Farnworth
From Farnworth, the nearest places we also cover are Little Lever (1.3 miles) and Kearsley (1.3 miles).
- Two-storey rear extension in Little Lever
- Two-storey rear extension in Kearsley
- Two-storey rear extension in Little Hulton
- Two-storey rear extension in Walkden
- Two-storey rear extension in Bolton
Other work in Farnworth:
FAQ
Two-storey rear extension questions in Farnworth
Do I need a party wall agreement?
In England, usually yes if the extension is on or near a shared boundary or the foundations are close to a neighbour's building. We serve the notices.
Can I live at home while the extension is built?
Usually yes. Most of the work is outside until the back wall is opened near the end, and that stage is screened off.
What is the 45-degree rule?
Many councils check that a two-storey extension does not cross a 45-degree line drawn from the nearest habitable window of the neighbouring house. We test it at the first drawing.
Is the site visit in Farnworth free?
Yes. We visit, measure up and talk through the options with no cost and no obligation.
Can you match the brick or stone on my Farnworth house?
We source the closest match and show you samples before ordering; reclaimed materials are often the best match on older houses.
Who will build my extension?
Vetted building teams working under contract to us. Your contract is with S&K Property Investments and Improvement Ltd for the design and the build.