Two-storey extensions in Bletchley
We design, get approval for and build two-storey extensions in Bletchley and the surrounding area. Choose the type of extension below or book a free site visit.
Bletchley at a glance
- Postcode districts
- MK1, MK2, MK3, MK4, MK7 and MK17
- Area
- Buckinghamshire, England
- Price region
- South East England
- Nearest towns
- Milton Keynes (3.5 miles), Leighton Buzzard (6.2 miles), Newport Pagnell (6.5 miles), Flitwick (10.2 miles)
- Distance to Milton Keynes
- about 3.5 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 Bletchley (MK1, MK2, MK3, MK4, MK7 and MK17) and the places around it, including Milton Keynes (3.5 miles), Leighton Buzzard (6.2 miles) and Newport Pagnell.
Extensions available in Bletchley
Two-storey rear extensions
Design, approvals and build for Bletchley homes. Guide from £61,500.
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Two-storey side extensions
Guide from £94,500 in Bletchley, including VAT.
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Two-storey wraparound extensions
Guide from £132,500 in Bletchley, including VAT.
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Part single, part two-storey extensions
Guide from £79,000 in Bletchley, including VAT.
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Extensions over a garage
Bletchley guide price from £34,500, Standard spec.
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First-floor extensions
Guide from £27,500 in Bletchley, including VAT.
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Two-storey extensions for semi-detached houses
Design, approvals and build for Bletchley homes. Guide from £61,500.
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Two-storey extensions for detached houses
From £94,500 in Bletchley. Free visit to firm it up.
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Kitchen extensions with bedrooms above
Guide from £61,500 (before kitchen units) in Bletchley, including VAT.
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Extra bedroom and en-suite extensions
Bletchley guide price from £61,500 (plus en-suite), Standard spec.
Learn moreWhich type suits your house?
Which type suits your house in Bletchley depends mostly on where you have room. A deep garden points to a rear extension; space beside the house points to a side or over-garage extension; a house that already has a single-storey extension can often take a first floor on top.
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 Bletchley
Bletchley 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 Bletchley
Do you cover Bletchley?
Yes. We cover Bletchley (MK1, MK2, MK3, MK4, MK7 and MK17) and the surrounding area, including Milton Keynes and Leighton Buzzard. The first site visit is free.
What does a two-storey extension cost in Bletchley?
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 Bletchley do you cover?
Everywhere around it, including Milton Keynes (3.5 miles), Leighton Buzzard (6.2 miles) and Newport Pagnell (6.5 miles), and the rest of Buckinghamshire.