St Ann's, Greater London
Terraced house rear extension in St Ann's
Rear and side return extensions for terraces, with access through the house and two neighbours. If you live in St Ann's 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.
St Ann's is covered from our Greater London round, including N4, N8 and N15. In St Ann's we plan the delivery route through the house and the skip licence before anything else.
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 St Ann's?
For St Ann's we work from the London rate: £2,660–£4,290 per square metre of new floor, including VAT, standard specification. 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 |
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 terraced house rear extension in St Ann's?
The planning route for a terraced house rear extension in St Ann's is set by England's householder rules and your council.
Under England's householder permitted development rules you can usually add 3 metres at the back of an attached house, or 4 metres on a detached house, without a planning application, as long as the extension stays under 4 metres high and its eaves stay under 3 metres where it is 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. We check your house's planning history and any conservation area before drawing, so the route is clear before you spend on plans.
What are homes in St Ann's like to extend?
Period terraces in St Ann's sit alongside flats, and the difference matters: houses usually keep permitted development rights, while flats and maisonettes need planning permission for any rear extension.
How a terraced house rear extension in St Ann's 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.
Options and costs
We draw layout options and price each one, so the budget shapes the design rather than surprising you later.
Planning and regulations
We take the design through the right planning route, then produce the construction drawings and engineer's calculations for building control.
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 St Ann's
From St Ann's, the nearest places we also cover are Harringay (0.4 miles) and Seven Sisters (0.6 miles).
- Terraced house rear extension in Harringay
- Terraced house rear extension in Seven Sisters
- Terraced house rear extension in Stroud Green
- Terraced house rear extension in Stamford Hill
- Terraced house rear extension in Hornsey
Other work in St Ann's:
FAQ
Terraced house rear extension questions in St Ann's
How long does a rear extension take to build in St Ann's?
Most single-storey rear extensions take 10 to 16 weeks on site and two-storey extensions 16 to 26 weeks, after design and approvals.
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 deep can I go on a terrace?
3 metres under permitted development in England, or up to 6 metres with prior approval outside designated land.
Can you match the brick or stone on my St Ann's house?
We source the closest match and show you samples before ordering; reclaimed materials are often the best match on older houses.
How much does a terraced house rear extension cost in St Ann's?
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.
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.