West Yorkshire
Rear extensions for semi-detached houses in West Yorkshire
Single or two-storey extensions for semi-detached houses, with side access and one party wall. We design and build rear extensions across West Yorkshire, from Leeds and Bradford to Huddersfield, covering single-storey kitchen extensions, two-storey additions, side returns and wraparounds.
Semi-detached houses are common across West Yorkshire, and their side access makes rear extensions quicker to build. 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 semi-detached rear extension cost in West Yorkshire?
In West Yorkshire, our guide for a semi-detached 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 |
These are guide ranges; the written quote after the survey is the figure that counts.
Do you need planning permission in West Yorkshire?
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.
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 far can I extend a semi without planning?
3 metres under permitted development in England, or up to 6 metres with prior approval, outside designated land.
Can I match pebbledash or render?
Yes. Many semis are refinished with new render across the whole back elevation so old and new match.
Single or two-storey on a semi?
Two-storey if you need bedrooms, single-storey if you need a bigger kitchen. Planning risk is lower for single-storey.
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.