Side return extensions in Castleford
We design and build side return extensions for houses in Castleford, with a written price once the survey and design are done and one point of contact throughout.
- Guide price in CastlefordFrom £16,500 inc VAT
- PlanningOften permitted development; party wall notice usual
- Build time10–14 weeks on site
- Postcode districtsWF6, WF10
Guide prices for Castleford
Labour and material costs vary across the UK, so for Castleford we use our Yorkshire and the Humber factor (×0.94). The ranges include VAT and exclude design, structural and council fees.
Typical rates in Castleford: £1,970 to £3,570 per m² including VAT, depending on specification.
| Size | Essential | Standard | Premium |
|---|---|---|---|
| 1.8 m × 4.5 m 8 m² | £16,500 – £20,500 | £18,000 – £23,000 | £22,500 – £29,000 |
| 2 m × 5.5 m 11 m² | £21,500 – £26,000 | £24,500 – £31,500 | £31,000 – £39,500 |
| 2.2 m × 7 m 15 m² | £29,500 – £35,500 | £33,500 – £42,500 | £42,000 – £54,000 |
Want a range for your exact size? The guide-price tool takes about a minute.
Will the council need to approve it?
In England a single-storey side return infill is often permitted development if it stays within the height limits and is no wider than half the width of the original house. Conservation areas, listed buildings and flats always need an application, and the boundary wall usually brings in the Party Wall Act.
Homes in conservation areas, national parks, National Landscapes (formerly AONBs), the Broads and World Heritage Sites have tighter rules, so we always check the property's status and planning history before design starts.
Building regulations approval is separate from planning. In England you can use the council's building control team or a registered building control approver; a full plans application gets the drawings checked before work starts, and the inspector signs the work off with a completion certificate.
Applications are decided by the local planning authority (your district, borough or unitary council).
Who a side return extension suits
- Victorian and Edwardian terraces with a rear outrigger
- Homes where the garden is too small to lose much depth
- Narrow galley kitchens
Working in Castleford
We cover Castleford and the postcode districts WF6, WF10. Neighbouring towns we cover include Pontefract (3 miles), Wakefield (6 miles), Leeds (9 miles), Ossett (9 miles).
Just over the South Yorkshire border, Darton is about 12 miles away. Homes across Yorkshire and the Humber range from back-to-back and through terraces to large suburban semis, and extension options vary with them.
From first visit to completion
Site visits are free and there is no obligation. Where drawings are needed, the design stage is priced in writing before it starts.
Free site visit
It starts with a visit to your house to measure, check access and talk through ideas and budget.
Design and approvals
We produce the drawings and structural design, and manage the approvals so they are in place before work starts.
Fixed written price
We confirm the build price in writing, based on the approved drawings and the finishes you have chosen.
Build and sign-off
Work is carried out to the agreed programme, inspected by building control and signed off at the end.
Common questions in Castleford
Can I see a price before committing to anything?
Yes. The guide prices on this page are adjusted for Castleford, and the guide-price tool gives a range for your own size. After the survey you get a written price before anything is agreed.
Do you cover all of Castleford?
Yes. We cover Castleford and the surrounding parts of West Yorkshire. Site visits are free and there is no obligation.
Who do I contract with for a side return extension in Castleford?
Your contract is with S&K Property Investments and Improvement Ltd, which designs and manages the project and the build teams who carry it out.
How much does a side return extension cost?
Our guide range is about £1,970 to £3,570 per m² including VAT, so a typical 2 m × 5.5 m infill lands around £24,500 to £31,500 at standard spec in Castleford, more in London.
Will the kitchen be darker?
Not if the roof is designed well. A glazed roof or a line of rooflights along the boundary usually makes the room brighter than before.
Book a free site visit in Castleford
We will measure up, check the planning position and give you honest guide figures.
- Free, no-obligation site visit
- Planning route checked before you spend on drawings
- Written price once the design is agreed
- Building control sign-off at the end
Prefer to talk? Call 0800 088 6341 or .
Book a free site visit
Tell us a little about the project and we will arrange a time.