Newcastle upon Tyne, Tyne and Wear
Semi-detached rear extension in Newcastle upon Tyne
For homes in Newcastle upon Tyne, a semi-detached rear extension is often the simplest way to gain space without moving. Single or two-storey extensions for semi-detached houses, with side access and one party wall. We take it from survey to completion certificate.
Newcastle upon Tyne is covered from our Tyne and Wear round, including NE3, NE4, NE5 and NE6. Semi-detached houses are common across Tyne and Wear, and their side access makes rear extensions quicker to build.
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 semi-detached rear extension cost in Newcastle upon Tyne?
In Newcastle upon Tyne, our guide for a semi-detached rear extension is £1,710–£2,790 per square metre including VAT for a standard specification. 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 wide × 4 m deep (12 m²) | £20,500–£33,500 |
| 4 m wide × 5 m deep (20 m²) | £34,000–£56,000 |
| 4 m wide × 6 m deep (24 m²) | £41,000–£67,000 |
These are guide ranges; the written quote after the survey is the figure that counts.
Do you need planning permission for a semi-detached rear extension in Newcastle upon Tyne?
Whether your semi-detached rear extension in Newcastle upon Tyne needs a planning application depends on its size, your house and any local restrictions.
In England a single-storey rear extension can often be built under permitted development: up to 3 metres beyond the original rear wall of an attached house, or 4 metres on a detached house, no higher than 4 metres, with eaves no higher than 3 metres if any part is within 2 metres of a boundary.
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.
England also has the larger home extension route: a single-storey rear extension of up to 6 metres on an attached house or 8 metres on a detached house, after prior approval from the council. The council notifies your neighbours and has 42 days to decide; the fee is £249 (£310 for applications made from 8 December 2026). The route is not available on designated land such as conservation areas.
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 Newcastle upon Tyne like to extend?
Terraces and semis are typical around Newcastle upon Tyne. On terraces a single-storey rear extension across the back yard is usually the practical choice; semis often have room for more. Where a Newcastle upon Tyne semi already has a small lean-to at the back, we usually replace it rather than extend it.
How a semi-detached rear extension in Newcastle upon Tyne 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.
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.
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.
Semi-detached rear extensions near Newcastle upon Tyne
From Newcastle upon Tyne, the nearest places we also cover are Gateshead (0.9 miles) and Gosforth (1.8 miles).
- Semi-detached rear extension in Gateshead
- Semi-detached rear extension in Gosforth
- Semi-detached rear extension in Felling
- Semi-detached rear extension in Whickham
- Semi-detached rear extension in Wallsend
Other work in Newcastle upon Tyne:
FAQ
Semi-detached rear extension questions in Newcastle upon Tyne
Can you match the brick or stone on my Newcastle upon Tyne house?
We source the closest match and show you samples before ordering; reclaimed materials are often the best match on older houses.
Do I need planning permission for a rear extension in Newcastle upon Tyne?
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.
How long does a semi extension take?
10 to 16 weeks on site for a single-storey extension.
Do you handle building control in Newcastle upon Tyne?
Yes. We apply to the council or a registered building control approver and hand over the completion certificate.
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 Newcastle upon Tyne?
Most single-storey rear extensions take 10 to 16 weeks on site and two-storey extensions 16 to 26 weeks, after design and approvals.