Two-storey extensions in Canvey Island
We design, get approval for and build two-storey extensions in Canvey Island and the surrounding area. Choose the type of extension below or book a free site visit.
Canvey Island at a glance
- Postcode districts
- SS8
- Area
- Essex, England
- Price region
- East of England
- Nearest towns
- South Benfleet (2.3 miles), Hadleigh (2.5 miles), Pitsea (4.2 miles), Rayleigh (4.5 miles)
- Distance to Southend-on-Sea
- about 5.8 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 Canvey Island we also work in South Benfleet, Hadleigh and Pitsea, and across the rest of Essex. Postcode district in and near Canvey Island: SS8.
Extensions available in Canvey Island
Two-storey rear extensions
From £57,500 in Canvey Island. Free visit to firm it up.
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Two-storey side extensions
Guide from £88,500 in Canvey Island, including VAT.
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Two-storey wraparound extensions
For homes in Canvey Island: typical guide from £124,000.
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Part single, part two-storey extensions
Our East of England guide starts at £74,000 for this type.
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Extensions over a garage
Our East of England guide starts at £32,500 for this type.
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First-floor extensions
Guide from £26,000 in Canvey Island, including VAT.
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Two-storey extensions for semi-detached houses
For homes in Canvey Island: typical guide from £57,500.
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Two-storey extensions for detached houses
Design, approvals and build for Canvey Island homes. Guide from £88,500.
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Kitchen extensions with bedrooms above
Canvey Island guide price from £57,500 (before kitchen units), Standard spec.
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Extra bedroom and en-suite extensions
Canvey Island guide price from £57,500 (plus en-suite), Standard spec.
Learn moreWhich type suits your house?
Rear, side, wraparound or over the garage: each adds space in a different way. For most houses in Essex, one or two of these will clearly suit the plot better than the rest, and we'll tell you which.
Also available in Essex
- 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 Canvey Island
Canvey Island 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 Canvey Island
Do you cover Canvey Island?
Yes. We cover Canvey Island (SS8) and the surrounding area, including South Benfleet and Hadleigh. The first site visit is free.
What does a two-storey extension cost in Canvey Island?
Using our East of 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 £57,500–£78,000 including VAT. An extension over a garage is about £32,500–£47,500.
Which other places near Canvey Island do you cover?
Everywhere around it, including South Benfleet (2.3 miles), Hadleigh (2.5 miles) and Pitsea (4.2 miles), and the rest of Essex.