Two-storey extensions in Buckingham
Planning a bigger home in Buckingham? Compare extension types and guide prices below, then book a free site visit.
Buckingham at a glance
- Postcode districts
- MK18
- Area
- Buckinghamshire, England
- Price region
- South East England
- Nearest towns
- Brackley (7.3 miles), Bicester (9.9 miles), Milton Keynes (10.3 miles), Bletchley (10.8 miles)
- Distance to Milton Keynes
- about 10.3 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.
Buckingham sits about 10.3 miles from Milton Keynes. Closer to home, Brackley is 7.3 miles away and Bicester 9.9 miles.
Extensions available in Buckingham
Two-storey rear extensions
For homes in Buckingham: typical guide from £61,500.
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Two-storey side extensions
Guide from £94,500 in Buckingham, including VAT.
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Two-storey wraparound extensions
Buckingham guide price from £132,500, Standard spec.
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Part single, part two-storey extensions
From £79,000 in Buckingham. Free visit to firm it up.
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Extensions over a garage
Our South East England guide starts at £34,500 for this type.
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First-floor extensions
Buckingham guide price from £27,500, Standard spec.
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Two-storey extensions for semi-detached houses
Buckingham guide price from £61,500, Standard spec.
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Two-storey extensions for detached houses
Design, approvals and build for Buckingham homes. Guide from £94,500.
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Kitchen extensions with bedrooms above
For homes in Buckingham: typical guide from £61,500 (before kitchen units).
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Extra bedroom and en-suite extensions
Buckingham guide price from £61,500 (plus en-suite), Standard spec.
Learn moreWhich type suits your house?
The boundaries usually decide it. Two-storey work close to a neighbour needs careful design for light and privacy, so at the visit in Buckingham we measure distances to every boundary before suggesting a type.
Also available in Buckinghamshire
- 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 Buckingham
Buckingham 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 Buckingham
Do you cover Buckingham?
Yes. We cover Buckingham (MK18) and the surrounding area, including Brackley and Bicester. The first site visit is free.
What does a two-storey extension cost in Buckingham?
Using our South East 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 £61,500–£83,000 including VAT. An extension over a garage is about £34,500–£50,500.
Which other places near Buckingham do you cover?
Everywhere around it, including Brackley (7.3 miles), Bicester (9.9 miles) and Milton Keynes (10.3 miles), and the rest of Buckinghamshire.