Two-storey extensions in Herne Bay
Homeowners in Herne Bay can use us for the whole project or just the drawings and approvals. Start with a free visit.
Herne Bay at a glance
- Postcode districts
- CT6
- Area
- Kent, England
- Price region
- South East England
- Nearest towns
- Whitstable (4.5 miles), Canterbury (6.8 miles), Birchington-on-Sea (7.6 miles), Faversham (11.1 miles)
- Distance to Maidstone
- about 27.4 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 Herne Bay we also work in Whitstable, Canterbury and Birchington-on-Sea, and across the rest of Kent. Postcode district in and near Herne Bay: CT6.
Extensions available in Herne Bay
Two-storey rear extensions
Guide from £61,500 in Herne Bay, including VAT.
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Two-storey side extensions
From £94,500 in Herne Bay. Free visit to firm it up.
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Two-storey wraparound extensions
Herne Bay guide price from £132,500, Standard spec.
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Part single, part two-storey extensions
For homes in Herne Bay: typical guide from £79,000.
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Extensions over a garage
For homes in Herne Bay: typical guide from £34,500.
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First-floor extensions
For homes in Herne Bay: typical guide from £27,500.
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Two-storey extensions for semi-detached houses
From £61,500 in Herne Bay. Free visit to firm it up.
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Two-storey extensions for detached houses
From £94,500 in Herne Bay. Free visit to firm it up.
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Kitchen extensions with bedrooms above
Design, approvals and build for Herne Bay homes. Guide from £61,500 (before kitchen units).
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Extra bedroom and en-suite extensions
For homes in Herne Bay: typical guide from £61,500 (plus en-suite).
Learn moreWhich type suits your house?
Start with what you need the space for. Bedrooms and an en-suite upstairs with a bigger kitchen below is the classic two-storey brief, but in Herne Bay we also design annexes, home offices and bedrooms over garages.
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 Herne Bay
Herne Bay 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 Herne Bay
Do you cover Herne Bay?
Yes. We cover Herne Bay (CT6) and the surrounding area, including Whitstable and Canterbury. The first site visit is free.
What does a two-storey extension cost in Herne Bay?
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 Herne Bay do you cover?
Everywhere around it, including Whitstable (4.5 miles), Canterbury (6.8 miles) and Birchington-on-Sea (7.6 miles), and the rest of Kent.