Two-storey extensions in Rochester
Everything for a two-storey extension in Rochester, in one place: types, guide prices for South East England, the approval rules in England and how to get started.
Rochester at a glance
- Postcode districts
- ME1
- Area
- Kent, England
- Price region
- South East England
- Nearest towns
- Chatham (1.1 miles), Strood (1.3 miles), Gillingham (1.9 miles), Snodland (4.8 miles)
- Distance to Maidstone
- about 8.4 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.
We cover postcode district ME1 in and around Rochester, along with neighbouring Chatham, Strood and Gillingham.
Extensions available in Rochester
Two-storey rear extensions
Guide from £61,500 in Rochester, including VAT.
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Two-storey side extensions
Design, approvals and build for Rochester homes. Guide from £94,500.
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Two-storey wraparound extensions
Guide from £132,500 in Rochester, including VAT.
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Part single, part two-storey extensions
Design, approvals and build for Rochester homes. Guide from £79,000.
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Extensions over a garage
For homes in Rochester: typical guide from £34,500.
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First-floor extensions
Our South East England guide starts at £27,500 for this type.
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Two-storey extensions for semi-detached houses
From £61,500 in Rochester. Free visit to firm it up.
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Two-storey extensions for detached houses
Design, approvals and build for Rochester homes. Guide from £94,500.
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Kitchen extensions with bedrooms above
Design, approvals and build for Rochester homes. Guide from £61,500 (before kitchen units).
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Extra bedroom and en-suite extensions
Guide from £61,500 (plus en-suite) in Rochester, 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 Rochester, with a rough idea of the approval route and cost for each.
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 Rochester
Rochester 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 Rochester
Do you cover Rochester?
Yes. We cover Rochester (ME1) and the surrounding area, including Chatham and Strood. The first site visit is free.
What does a two-storey extension cost in Rochester?
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 Rochester do you cover?
Everywhere around it, including Chatham (1.1 miles), Strood (1.3 miles) and Gillingham (1.9 miles), and the rest of Kent.