Daventry, Northamptonshire
Two-storey rear extension in Daventry
A larger kitchen downstairs and an extra bedroom or bathroom upstairs, under one roof. We design, get the approvals for and build two-storey rear extensions in Daventry and the surrounding area, with one contract from the first survey to building control sign-off.
Daventry is covered from our Northamptonshire round, including NN11. In Northamptonshire we check the neighbours' rear windows first, because the upper floor is where most two-storey schemes win or lose planning.
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 two-storey rear extension cost in Daventry?
Guide prices for a two-storey rear extension in Daventry start from our East Midlands rate of £1,750–£2,620 per square metre, including VAT. East Midlands prices sit a little below our West Midlands baseline.
| Size | Guide price inc VAT |
|---|---|
| 3 m × 5 m footprint, two floors (30 m²) | £52,500–£78,500 |
| 4 m × 6 m footprint, two floors (48 m²) | £84,000–£125,500 |
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 two-storey rear extension in Daventry?
Whether your two-storey rear extension in Daventry needs a planning application depends on its size, your house and any local restrictions.
England's rules allow a rear extension of more than one storey without an application only when it is no deeper than 3 metres and at least 7 metres from the boundary opposite the rear wall, and never on designated land. Most two-storey schemes need householder planning permission.
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 Daventry like to extend?
Daventry has plenty of inter-war semis and bungalows, and single-storey rear extensions suit both.
How a two-storey rear extension in Daventry comes together
Look round and measure
A free visit to see the back of the house, measure it, check the drains and boundaries and hear what you need.
Options and costs
We draw layout options and price each one, so the budget shapes the design rather than surprising you later.
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.
Two-storey rear extensions near Daventry
We also build two-storey rear extensions in nearby Rugby (9.0 miles) and Northampton (11.7 miles).
- Two-storey rear extension in Rugby
- Two-storey rear extension in Northampton
- Two-storey rear extension in Royal Leamington Spa
- Two-storey rear extension in Banbury
- Two-storey rear extension in Brackley
Other work in Daventry:
FAQ
Two-storey rear extension questions in Daventry
How much does a two-storey rear extension cost in Daventry?
As a guide, £1,750–£2,620 per square metre including VAT for a standard specification. For example, 3 m × 5 m footprint, two floors (30 m²): about £52,500–£78,500 at that rate. Your written price follows the survey.
Will I need a structural engineer?
Yes for the beam over the new opening and usually the foundations; we arrange them and their calculations go to building control.
Will we need to move out?
Rarely. The first-floor opening is made late in the job and sealed with temporary screens.
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.
Do I need planning permission for a rear extension in Daventry?
Often not for a single-storey rear extension of up to 3 metres (4 metres on a detached house) under permitted development, or up to 6 or 8 metres with prior approval, unless the house is in a conservation area or its rights have been removed.
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.