Berwick-upon-Tweed, Northumberland
Two-storey rear extension in Berwick-upon-Tweed
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 Berwick-upon-Tweed and the surrounding area, with one contract from the first survey to building control sign-off.
We cover Berwick-upon-Tweed (TD15) as part of our Northumberland work. Two-storey rear extensions suit semi-detached houses in Berwick-upon-Tweed best, where the extra bedroom matters as much as the bigger kitchen.
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 Berwick-upon-Tweed?
Guide prices for a two-storey rear extension in Berwick-upon-Tweed start from our North East England rate of £1,620–£2,430 per square metre, including VAT. North East prices are among the lowest in our range; former mining ground is the main foundation variable.
| Size | Guide price inc VAT |
|---|---|
| 3 m × 5 m footprint, two floors (30 m²) | £48,500–£73,000 |
| 4 m × 6 m footprint, two floors (48 m²) | £78,000–£116,500 |
Your written price follows a measured survey and an agreed design, so it reflects your house, not an average.
Do you need planning permission for a two-storey rear extension in Berwick-upon-Tweed?
Here is how the rules in England apply to a two-storey rear extension in Berwick-upon-Tweed.
A two-storey rear extension can be permitted development in England only if it projects no more than 3 metres, stays at least 7 metres from the rear boundary, matches the existing roof pitch and has obscure-glazed upper side windows. In practice most double-storey rear extensions go through a householder planning application.
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 Berwick-upon-Tweed like to extend?
Terraces and semis are typical around Berwick-upon-Tweed. On terraces a single-storey rear extension across the back yard is usually the practical choice; semis often have room for more.
How a two-storey rear extension in Berwick-upon-Tweed 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.
Build and sign-off
We build to the approved drawings with regular updates, then hand over the building control completion certificate and any guarantees from suppliers.
Two-storey rear extensions near Berwick-upon-Tweed
We also build two-storey rear extensions in nearby Kelso (20.4 miles) and Dunbar (25.4 miles).
- Two-storey rear extension in Kelso
- Two-storey rear extension in Dunbar
- Two-storey rear extension in Galashiels
- Two-storey rear extension in Selkirk
- Two-storey rear extension in Tranent
Other work in Berwick-upon-Tweed:
FAQ
Two-storey rear extension questions in Berwick-upon-Tweed
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.
Do I need planning permission for a rear extension in Berwick-upon-Tweed?
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 add an en-suite upstairs?
Yes. We plan the soil pipe route early so the bathroom sits where drainage works without boxing through the room below.
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 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.
How long does a rear extension take to build in Berwick-upon-Tweed?
Most single-storey rear extensions take 10 to 16 weeks on site and two-storey extensions 16 to 26 weeks, after design and approvals.