Farnworth, Greater Manchester
Side return extension in Farnworth
We plan and build side return extensions for homeowners in Farnworth. Infilling the narrow passage beside a Victorian or Edwardian back addition. Start with a free site visit, then a written price once the design is agreed.
Farnworth is covered from our Greater Manchester round, including BL2, BL3 and BL4. Side return projects in Farnworth usually start with a drainage survey of the side passage.
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 side return extension cost in Farnworth?
A side return extension in Farnworth is priced at £2,160–£3,570 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 |
|---|---|
| 2 m wide × 6 m deep (12 m²) | £26,000–£43,000 |
| 2.5 m wide × 7 m deep (17.5 m²) | £38,000–£62,500 |
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 side return extension in Farnworth?
Here is how the rules in England apply to a side return extension in Farnworth.
Side return infills and the side leg of a wraparound are treated as side extensions in England: single-storey, no more than 4 metres high and no wider than half the original house. They are not permitted development in conservation areas, National Parks or National Landscapes, and a joined wraparound often needs a planning application because the side and rear rules apply together.
The Party Wall etc. Act 1996 applies in England: you serve notice two months before work to a shared wall, and one month before digging foundations within 3 metres (or 6 metres for deeper foundations) of a neighbour's building. Neighbours can agree in writing; if they dissent, surveyors agree an award.
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 side return extension in Farnworth comes together
Survey visit
We visit free of charge, measure up, check access, drainage and neighbours' extensions, and note what you want the room to do.
Drawings and budget
Floor plans and elevations for the options, each with a guide price.
Planning and regulations
We take the design through the right planning route, then produce the construction drawings and engineer's calculations for building control.
Written price, then build
Once the design and approvals are in place, you get a fixed written price and programme, and we build through to sign-off.
Side return extensions near Farnworth
We also build side return extensions in nearby Little Lever (1.3 miles) and Kearsley (1.3 miles).
- Side return extension in Little Lever
- Side return extension in Kearsley
- Side return extension in Little Hulton
- Side return extension in Walkden
- Side return extension in Bolton
Other work in Farnworth:
FAQ
Side return 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.
Where does the drainage go?
Side passages often carry the soil and rainwater pipes. We survey them first and reroute them under the new floor where needed.
Do you handle building control in Farnworth?
Yes. We apply to the council or a registered building control approver and hand over the completion certificate.
How much does a side return extension cost in Farnworth?
As a guide, £2,160–£3,570 per square metre including VAT for a standard specification. For example, 2 m wide × 6 m deep (12 m²): about £26,000–£43,000 at that rate. Your written price follows the survey.
Can I get a price without a visit?
Our online guide-price tool gives a range in a couple of minutes. A written price needs a survey.