Two-storey extensions in Newmarket
We design, get approval for and build two-storey extensions in Newmarket and the surrounding area. Choose the type of extension below or book a free site visit.
Newmarket at a glance
- Postcode districts
- CB8
- Area
- Cambridgeshire, England
- Price region
- East of England
- Nearest towns
- Soham (6.9 miles), Mildenhall (8.2 miles), Haverhill (11.3 miles), Ely (12.3 miles)
- Distance to Peterborough
- about 35.7 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 Newmarket (CB8) and the places around it, including Soham (6.9 miles), Mildenhall (8.2 miles) and Haverhill.
Extensions available in Newmarket
Two-storey rear extensions
Design, approvals and build for Newmarket homes. Guide from £57,500.
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Two-storey side extensions
Guide from £88,500 in Newmarket, including VAT.
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Two-storey wraparound extensions
Our East of England guide starts at £124,000 for this type.
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Part single, part two-storey extensions
From £74,000 in Newmarket. Free visit to firm it up.
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Extensions over a garage
Newmarket guide price from £32,500, Standard spec.
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First-floor extensions
From £26,000 in Newmarket. Free visit to firm it up.
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Two-storey extensions for semi-detached houses
Guide from £57,500 in Newmarket, including VAT.
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Two-storey extensions for detached houses
Newmarket guide price from £88,500, Standard spec.
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Kitchen extensions with bedrooms above
Newmarket guide price from £57,500 (before kitchen units), Standard spec.
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Extra bedroom and en-suite extensions
Guide from £57,500 (plus en-suite) in Newmarket, including VAT.
Learn moreWhich type suits your house?
Which type suits your house in Newmarket 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 Cambridgeshire
- 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 Newmarket
Newmarket 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 Newmarket
Do you cover Newmarket?
Yes. We cover Newmarket (CB8) and the surrounding area, including Soham and Mildenhall. The first site visit is free.
What does a two-storey extension cost in Newmarket?
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 Newmarket do you cover?
Everywhere around it, including Soham (6.9 miles), Mildenhall (8.2 miles) and Haverhill (11.3 miles), and the rest of Cambridgeshire.