Two-storey extensions in Knottingley
From over-garage bedrooms to full wraparounds, we cover every kind of two-storey extension in Knottingley.
Knottingley at a glance
- Postcode districts
- WF11
- Area
- West Yorkshire, England
- Price region
- Yorkshire and the Humber
- Nearest towns
- Pontefract (2.6 miles), Castleford (4.5 miles), Featherstone (West Yorkshire) (4.6 miles), Kippax (6.2 miles)
- Distance to Leeds
- about 13.4 miles
- Approvals
- Two-storey rear: up to 3 m deep and 7 m from the rear boundary under permitted development. Side, wraparound and front: planning permission.
We cover postcode district WF11 in and around Knottingley, along with neighbouring Pontefract, Castleford and Featherstone (West Yorkshire).
Extensions available in Knottingley
Two-storey rear extensions
From £51,500 in Knottingley. Free visit to firm it up.
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Two-storey side extensions
From £79,000 in Knottingley. Free visit to firm it up.
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Two-storey wraparound extensions
Guide from £111,000 in Knottingley, including VAT.
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Part single, part two-storey extensions
Guide from £66,000 in Knottingley, including VAT.
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Extensions over a garage
For homes in Knottingley: typical guide from £29,000.
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First-floor extensions
Our Yorkshire and the Humber guide starts at £23,000 for this type.
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Two-storey extensions for semi-detached houses
From £51,500 in Knottingley. Free visit to firm it up.
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Two-storey extensions for detached houses
Guide from £79,000 in Knottingley, including VAT.
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Kitchen extensions with bedrooms above
Design, approvals and build for Knottingley homes. Guide from £51,500 (before kitchen units).
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Extra bedroom and en-suite extensions
Guide from £51,500 (plus en-suite) in Knottingley, including VAT.
Learn moreWhich type suits your house?
If you're not sure which type fits, that's what the free visit is for. We'll sketch the realistic options for your house in Knottingley, with a rough idea of the approval route and cost for each.
Also available in West Yorkshire
- Two-storey front extensions
- Two-storey extensions for end-of-terrace houses
- Two-storey annexe extensions
- Garage conversions with a room above
- Two-storey extension plans and drawings
- Planning permission for two-storey extensions
- Structural engineering for two-storey extensions
- Building regulations for two-storey extensions
- Party wall notices for extensions
- Design and build two-storey extensions
Rules for Knottingley
Knottingley is in England. Two-storey rear: up to 3 m deep and 7 m from the rear boundary under permitted development. Side, wraparound and front: planning permission. Householder planning application: £548 (or £575 for applications made from 8 December 2026). Lawful development certificate: £274 (about £288 for applications from 8 December 2026). Councils should decide householder applications within 8 weeks of validation.
The full England rules explained
Questions about extensions in Knottingley
Do you cover Knottingley?
Yes. We cover Knottingley (WF11) and the surrounding area, including Pontefract and Castleford. The first site visit is free.
What does a two-storey extension cost in Knottingley?
Using our Yorkshire and the Humber guide, a two-storey rear extension with a 4 m × 3.5 m footprint on two floors (28 m² of new floor space) is about £51,500–£69,500 including VAT. An extension over a garage is about £29,000–£42,000.
Which other places near Knottingley do you cover?
Everywhere around it, including Pontefract (2.6 miles), Castleford (4.5 miles) and Featherstone (West Yorkshire) (4.6 miles), and the rest of West Yorkshire.