Northampton, Northamptonshire
Terraced house rear extension in Northampton
Rear and side return extensions for terraces, with access through the house and two neighbours. If you live in Northampton 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.
We cover Northampton (NN1, NN2, NN3 and NN4) as part of our Northamptonshire work. In Northampton 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 Northampton?
For Northampton we work from the East Midlands rate: £1,990–£3,200 per square metre of new floor, including VAT, standard specification. East Midlands prices sit a little below our West Midlands baseline.
| Size | Guide price inc VAT |
|---|---|
| 3 m wide × 4.5 m deep (13.5 m²) | £27,000–£43,000 |
| 3 m wide × 6 m deep (18 m²) | £36,000–£57,500 |
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 Northampton?
Whether your terraced house rear extension in Northampton needs a planning application depends on its size, your house and any local restrictions.
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.
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. 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 Northampton like to extend?
Red-brick terraces and semis are typical of Northampton. Coal-mining legacy areas in parts of the East Midlands can need a Coal Authority check before foundations are designed.
How a terraced house rear extension in Northampton comes together
Free site visit
We measure the house and garden, look at the back wall, drainage and boundaries, and talk through what you want from the space.
Options and costs
We draw layout options and price each one, so the budget shapes the design rather than surprising you later.
Paperwork handled
Planning, prior approval or permitted development, Building Regulations approval, structural design and party wall notices are all handled by us.
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 Northampton
Close by, we work in Wellingborough, about 8.8 miles away, and Daventry, about 11.7 miles away.
- Terraced house rear extension in Wellingborough
- Terraced house rear extension in Daventry
- Terraced house rear extension in Rushden
- Terraced house rear extension in Kettering
- Terraced house rear extension in Newport Pagnell
Other work in Northampton:
FAQ
Terraced house rear extension questions in Northampton
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.
Is the site visit in Northampton free?
Yes. We visit, measure up and talk through the options with no cost and no obligation.
Will my terrace be in a conservation area?
Many Victorian terraces are. Your council's map shows it; we check at the survey.
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.
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.
Do you handle building control in Northampton?
Yes. We apply to the council or a registered building control approver and hand over the completion certificate.