Two-storey extensions in Folkestone
From over-garage bedrooms to full wraparounds, we cover every kind of two-storey extension in Folkestone.
Folkestone at a glance
- Postcode districts
- CT18, CT19 and CT20
- Area
- Kent, England
- Price region
- South East England
- Nearest towns
- Hythe (Kent) (3.7 miles), Dover (7 miles), New Romney (11.8 miles), Ashford (Kent) (13.5 miles)
- Distance to Maidstone
- about 30.9 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.
Folkestone sits about 30.9 miles from Maidstone. Closer to home, Hythe (Kent) is 3.7 miles away and Dover 7.0 miles.
Extensions available in Folkestone
Two-storey rear extensions
Guide from £61,500 in Folkestone, including VAT.
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Two-storey side extensions
Design, approvals and build for Folkestone homes. Guide from £94,500.
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Two-storey wraparound extensions
From £132,500 in Folkestone. Free visit to firm it up.
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Part single, part two-storey extensions
Folkestone guide price from £79,000, Standard spec.
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Extensions over a garage
Folkestone guide price from £34,500, Standard spec.
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First-floor extensions
For homes in Folkestone: typical guide from £27,500.
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Two-storey extensions for semi-detached houses
For homes in Folkestone: typical guide from £61,500.
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Two-storey extensions for detached houses
For homes in Folkestone: typical guide from £94,500.
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Kitchen extensions with bedrooms above
Folkestone guide price from £61,500 (before kitchen units), Standard spec.
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Extra bedroom and en-suite extensions
For homes in Folkestone: typical guide from £61,500 (plus en-suite).
Learn moreWhich type suits your house?
Which type suits your house in Folkestone 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 Kent
- 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 Folkestone
Folkestone 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 Folkestone
Do you cover Folkestone?
Yes. We cover Folkestone (CT18, CT19 and CT20) and the surrounding area, including Hythe (Kent) and Dover. The first site visit is free.
What does a two-storey extension cost in Folkestone?
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 Folkestone do you cover?
Everywhere around it, including Hythe (Kent) (3.7 miles), Dover (7 miles) and New Romney (11.8 miles), and the rest of Kent.