Two-storey extensions in Crowborough
From over-garage bedrooms to full wraparounds, we cover every kind of two-storey extension in Crowborough.
Crowborough at a glance
- Postcode districts
- TN6, TN7 and TN20
- Area
- East Sussex, England
- Price region
- South East England
- Nearest towns
- Tunbridge Wells (6.6 miles), Uckfield (7 miles), East Grinstead (8.5 miles), Tonbridge (10.4 miles)
- Distance to Brighton
- about 20.8 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.
Around Crowborough we also work in Tunbridge Wells, Uckfield and East Grinstead, and across the rest of East Sussex. Postcode districts in and near Crowborough: TN6, TN7 and TN20.
Extensions available in Crowborough
Two-storey rear extensions
Our South East England guide starts at £61,500 for this type.
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Two-storey side extensions
For homes in Crowborough: typical guide from £94,500.
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Two-storey wraparound extensions
For homes in Crowborough: typical guide from £132,500.
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Part single, part two-storey extensions
Guide from £79,000 in Crowborough, including VAT.
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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
For homes in Crowborough: typical guide from £27,500.
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Two-storey extensions for semi-detached houses
Crowborough guide price from £61,500, Standard spec.
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Two-storey extensions for detached houses
From £94,500 in Crowborough. Free visit to firm it up.
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Kitchen extensions with bedrooms above
Crowborough guide price from £61,500 (before kitchen units), Standard spec.
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Extra bedroom and en-suite extensions
Guide from £61,500 (plus en-suite) in Crowborough, including VAT.
Learn moreWhich type suits your house?
If you're not sure which type fits, that's what the free visit is for. We'll sketch the realistic options for your house in Crowborough, with a rough idea of the approval route and cost for each.
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 Crowborough
Crowborough 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 Crowborough
Do you cover Crowborough?
Yes. We cover Crowborough (TN6, TN7 and TN20) and the surrounding area, including Tunbridge Wells and Uckfield. The first site visit is free.
What does a two-storey extension cost in Crowborough?
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 Crowborough do you cover?
Everywhere around it, including Tunbridge Wells (6.6 miles), Uckfield (7 miles) and East Grinstead (8.5 miles), and the rest of East Sussex.