Two-storey extensions in Lewes
From over-garage bedrooms to full wraparounds, we cover every kind of two-storey extension in Lewes.
Lewes at a glance
- Postcode districts
- BN7 and BN8
- Area
- East Sussex, England
- Price region
- South East England
- Nearest towns
- Rottingdean (5.3 miles), Peacehaven (5.7 miles), Newhaven (5.7 miles), Brighton (7.2 miles)
- Distance to Brighton
- about 7.2 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.
Around Lewes we also work in Rottingdean, Peacehaven and Newhaven, and across the rest of East Sussex. Postcode districts in and near Lewes: BN7 and BN8.
Extensions available in Lewes
Two-storey rear extensions
Our South East England guide starts at £61,500 for this type.
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Two-storey side extensions
Guide from £94,500 in Lewes, including VAT.
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Two-storey wraparound extensions
For homes in Lewes: typical guide from £132,500.
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Part single, part two-storey extensions
Lewes guide price from £79,000, Standard spec.
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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
Design, approvals and build for Lewes homes. Guide from £27,500.
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Two-storey extensions for semi-detached houses
For homes in Lewes: typical guide from £61,500.
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Two-storey extensions for detached houses
Design, approvals and build for Lewes homes. Guide from £94,500.
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Kitchen extensions with bedrooms above
For homes in Lewes: typical guide from £61,500 (before kitchen units).
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Extra bedroom and en-suite extensions
From £61,500 (plus en-suite) in Lewes. Free visit to firm it up.
Learn moreWhich type suits your house?
Rear, side, wraparound or over the garage: each adds space in a different way. For most houses in East Sussex, one or two of these will clearly suit the plot better than the rest, and we'll tell you which.
Also available in East Sussex
- 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 Lewes
Lewes 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 Lewes
Do you cover Lewes?
Yes. We cover Lewes (BN7 and BN8) and the surrounding area, including Rottingdean and Peacehaven. The first site visit is free.
What does a two-storey extension cost in Lewes?
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 Lewes do you cover?
Everywhere around it, including Rottingdean (5.3 miles), Peacehaven (5.7 miles) and Newhaven (5.7 miles), and the rest of East Sussex.