West Yorkshire
Single-storey rear extensions in West Yorkshire
Ground-floor space across the back of the house, usually for a kitchen, dining or family room. Across West Yorkshire we handle the whole rear extension: survey, drawings, the planning route, building control and the build. Towns we cover here include Leeds, Bradford and Huddersfield.
A single-storey rear extension in Leeds is mostly built from the garden side, so the house stays usable for most of the job. West Yorkshire has through terraces and some back-to-backs as well as later semis; back-to-backs have little or no rear space, so we look at side or loft options there.
How much does a single-storey rear extension cost in West Yorkshire?
In West Yorkshire, our guide for a single-storey rear extension is £1,770–£2,880 per square metre including VAT for a standard specification. Yorkshire prices sit below our West Midlands baseline; matching natural stone is the main variable.
| Size | Guide price inc VAT |
|---|---|
| 3 m wide × 4 m deep (12 m²) | £21,000–£34,500 |
| 4 m wide × 5 m deep (20 m²) | £35,500–£57,500 |
| 4 m wide × 6 m deep (24 m²) | £42,500–£69,000 |
Your written price follows a measured survey and an agreed design, so it reflects your house, not an average.
Do you need planning permission in West Yorkshire?
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.
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.
Where in West Yorkshire do we work?
- Leeds
- Bradford
- Huddersfield
- Wakefield
- Halifax
- Dewsbury
- Morley
- Keighley
- Castleford
- Pontefract
- Batley
- Yeadon
- Brighouse
- Shipley
- Cleckheaton
- Pudsey
- Lofthouse
- Ossett
- Guiseley
- Liversedge
- Horsforth
- South Elmsall
- Mirfield
- Chapel Allerton
- Heckmondwike
- Bingley
- Kippax
- Baildon
- Elland
- Garforth
- Ilkley
- Otley
- Knottingley
- Wetherby
- Todmorden
- Rastrick
- Featherstone
- Horbury
FAQ
Questions people ask
How deep can a single-storey rear extension be without planning?
In England, 3 metres on an attached house and 4 metres on a detached house under permitted development, or up to 6 and 8 metres with prior approval. Wales allows 4 metres; Scotland and Northern Ireland have their own limits.
Is a flat roof or a pitched roof better?
A warm flat roof keeps the extension low under first-floor windows and suits a roof lantern; a pitched or lean-to roof gives a vaulted ceiling. Both last for decades when built properly.
Can I stay in the house during the build?
Usually yes. The noisiest, dustiest stage, removing the back wall, is kept to the final weeks and screened off. Most families set up a temporary kitchen elsewhere in the house.
Do you cover all of West Yorkshire?
We cover 38 towns and districts in West Yorkshire, including Leeds, Bradford and Huddersfield.
Who builds the extension?
Vetted building teams working under contract to us; your contract is with S&K Property Investments and Improvement Ltd.