Two-storey extensions in King's Lynn
Planning a bigger home in King's Lynn? Compare extension types and guide prices below, then book a free site visit.
King's Lynn at a glance
- Postcode districts
- PE30, PE32, PE34 and PE35
- Area
- Norfolk, England
- Price region
- East of England
- Nearest towns
- Downham Market (10 miles), Wisbech (11.5 miles), March (18.9 miles), Watton (22.4 miles)
- Distance to Norwich
- about 38.8 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 King's Lynn (PE30, PE32, PE34 and PE35) and the places around it, including Downham Market (10.0 miles), Wisbech (11.5 miles) and March.
Extensions available in King's Lynn
Two-storey rear extensions
Guide from £57,500 in King's Lynn, including VAT.
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Two-storey side extensions
King's Lynn guide price from £88,500, Standard spec.
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Two-storey wraparound extensions
From £124,000 in King's Lynn. Free visit to firm it up.
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Part single, part two-storey extensions
Design, approvals and build for King's Lynn homes. Guide from £74,000.
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Extensions over a garage
King's Lynn guide price from £32,500, Standard spec.
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First-floor extensions
Design, approvals and build for King's Lynn homes. Guide from £26,000.
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Two-storey extensions for semi-detached houses
Guide from £57,500 in King's Lynn, including VAT.
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Two-storey extensions for detached houses
Guide from £88,500 in King's Lynn, including VAT.
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Kitchen extensions with bedrooms above
Our East of England guide starts at £57,500 (before kitchen units) for this type.
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Extra bedroom and en-suite extensions
Design, approvals and build for King's Lynn homes. Guide from £57,500 (plus en-suite).
Learn moreWhich type suits your house?
Start with what you need the space for. Bedrooms and an en-suite upstairs with a bigger kitchen below is the classic two-storey brief, but in King's Lynn we also design annexes, home offices and bedrooms over garages.
Also available in Norfolk
- 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 King's Lynn
King's Lynn 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 King's Lynn
Do you cover King's Lynn?
Yes. We cover King's Lynn (PE30, PE32, PE34 and PE35) and the surrounding area, including Downham Market and Wisbech. The first site visit is free.
What does a two-storey extension cost in King's Lynn?
Using our East of England 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 £57,500–£78,000 including VAT. An extension over a garage is about £32,500–£47,500.
Which other places near King's Lynn do you cover?
Everywhere around it, including Downham Market (10 miles), Wisbech (11.5 miles) and March (18.9 miles), and the rest of Norfolk.