Northwich, Cheshire
Terraced house rear extension in Northwich
Rear and side return extensions for terraces, with access through the house and two neighbours. If you live in Northwich and want to know what a terraced house rear extension would cost and whether it needs planning, start with the online guide price or a free site visit.
Northwich and its postcode districts CW9 are part of our Cheshire coverage. Terraced streets make up much of the housing in parts of Cheshire, and most rear extensions here go in without side access.
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 terraced house rear extension cost in Northwich?
For Northwich we work from the North West England rate: £1,930–£3,100 per square metre of new floor, including VAT, standard specification. North West prices sit below our West Midlands baseline; access on terraced streets is the main variable.
| Size | Guide price inc VAT |
|---|---|
| 3 m wide × 4.5 m deep (13.5 m²) | £26,000–£42,000 |
| 3 m wide × 6 m deep (18 m²) | £34,500–£56,000 |
These are guide ranges; the written quote after the survey is the figure that counts.
Do you need planning permission for a terraced house rear extension in Northwich?
Here is how the rules in England apply to a terraced house rear extension in Northwich.
English permitted development (Class A) allows a single-storey rear extension of 3 metres on a terraced or semi-detached house and 4 metres on a detached one, measured from the original house, with a maximum height of 4 metres and eaves of no more than 3 metres within 2 metres of a boundary.
Because rear extensions often sit on or near the boundary, the Party Wall etc. Act 1996 usually applies in England. Notices go out one or two months before work depending on the type of work, and a surveyor's award is only needed if a neighbour does not consent.
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 Northwich like to extend?
Northwich has long runs of terraced houses with back yards and alleys, plus 1930s semis further out. Yard extensions on terraces are often single-storey and close to both boundaries.
How a terraced house rear extension in Northwich 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.
Design and guide price
Two or three layout options with a guide price for each, so you choose the design knowing what it costs.
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.
Terraced house rear extensions near Northwich
From Northwich, the nearest places we also cover are Winsford (4.7 miles) and Middlewich (5.5 miles).
- Terraced house rear extension in Winsford
- Terraced house rear extension in Middlewich
- Terraced house rear extension in Knutsford
- Terraced house rear extension in Lymm
- Terraced house rear extension in Warrington
Other work in Northwich:
FAQ
Terraced house rear extension questions in Northwich
Is the site visit in Northwich free?
Yes. We visit, measure up and talk through the options with no cost and no obligation.
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.
How do you keep the house clean?
Dust screens, floor protection and a single protected route through the house.
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.
How much does a terraced house rear extension cost in Northwich?
As a guide, £1,930–£3,100 per square metre including VAT for a standard specification. For example, 3 m wide × 4.5 m deep (13.5 m²): about £26,000–£42,000 at that rate. Your written price follows the survey.
What postcode areas do you cover around Northwich?
Including CW9, and the surrounding Cheshire area.