Cheam, Greater London
Terraced house rear extension in Cheam
Rear and side return extensions for terraces, with access through the house and two neighbours. We design, get the approvals for and build rear extensions for terraced houses in Cheam and the surrounding area, with one contract from the first survey to building control sign-off.
Cheam and its postcode districts SM1, SM2 and SM3 are part of our Greater London coverage. On a Cheam terrace both neighbours usually need party wall notices or agreement, so we talk to them early.
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 Cheam?
A terraced house rear extension in Cheam is priced at £2,660–£4,290 per square metre including VAT as a guide, before kitchen fit-out and fees. London prices sit at the top of our range because of labour rates, access through the house, parking suspensions and skip licences.
| Size | Guide price inc VAT |
|---|---|
| 3 m wide × 4.5 m deep (13.5 m²) | £36,000–£58,000 |
| 3 m wide × 6 m deep (18 m²) | £48,000–£77,000 |
Ground conditions, glazing, the roof and how far the house is opened up move the final figure within the range.
Do you need planning permission for a terraced house rear extension in Cheam?
Planning for a terraced house rear extension in Cheam follows the English householder rules.
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. At the first visit we measure what is there now and tell you which route fits: permitted development, prior approval or a planning application.
What are homes in Cheam like to extend?
Much of Cheam is 1920s and 1930s semis and short terraces with longer gardens than inner London, which suit full-width single-storey rear extensions. Parking suspensions, skip licences and controlled hours on residential streets shape the programme more than the build itself.
How a terraced house rear extension in Cheam 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.
Approvals
Permitted development check, prior approval or planning application, then Building Regulations drawings and structural calculations, plus party wall notices where they apply.
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.
Terraced house rear extensions near Cheam
From Cheam, the nearest places we also cover are Sutton (1.2 miles) and Ewell (1.5 miles).
- Terraced house rear extension in Sutton
- Terraced house rear extension in Ewell
- Terraced house rear extension in Belmont
- Terraced house rear extension in Worcester Park
- Terraced house rear extension in St Helier
Other work in Cheam:
FAQ
Terraced house rear extension questions in Cheam
Is the site visit in Cheam free?
Yes. We visit, measure up and talk through the options with no cost and no obligation.
What postcode areas do you cover around Cheam?
Including SM1, SM2 and SM3, and the surrounding Greater London area.
Can you build without side access?
Yes. Materials come through the house in protected runs or over the roof by crane on tight sites.
Do you handle building control in Cheam?
Yes. We apply to the council or a registered building control approver and hand over the completion certificate.
How much does a terraced house rear extension cost in Cheam?
As a guide, £2,660–£4,290 per square metre including VAT for a standard specification. For example, 3 m wide × 4.5 m deep (13.5 m²): about £36,000–£58,000 at that rate. Your written price follows the survey.
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.