Two-storey extensions in Basildon
Need more room in Basildon? Two-storey and first-floor extensions add bedrooms and living space without moving. Here's everything we offer locally.
Basildon at a glance
- Postcode districts
- SS14, SS15 and SS16
- Area
- Essex, England
- Price region
- East of England
- Nearest towns
- Pitsea (2.2 miles), Stanford-le-Hope (3.3 miles), Wickford (4.1 miles), Billericay (4.5 miles)
- Distance to Southend-on-Sea
- about 11.2 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 Basildon we also work in Pitsea, Stanford-le-Hope and Wickford, and across the rest of Essex. Postcode districts in and near Basildon: SS14, SS15 and SS16.
Extensions available in Basildon
Two-storey rear extensions
For homes in Basildon: typical guide from £57,500.
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Two-storey side extensions
Basildon guide price from £88,500, Standard spec.
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Two-storey wraparound extensions
Our East of England guide starts at £124,000 for this type.
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Part single, part two-storey extensions
For homes in Basildon: typical guide from £74,000.
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Extensions over a garage
For homes in Basildon: typical guide from £32,500.
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First-floor extensions
Guide from £26,000 in Basildon, including VAT.
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Two-storey extensions for semi-detached houses
From £57,500 in Basildon. Free visit to firm it up.
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Two-storey extensions for detached houses
Basildon guide price from £88,500, Standard spec.
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Kitchen extensions with bedrooms above
From £57,500 (before kitchen units) in Basildon. Free visit to firm it up.
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Extra bedroom and en-suite extensions
Design, approvals and build for Basildon homes. Guide from £57,500 (plus en-suite).
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 Basildon, with a rough idea of the approval route and cost for each.
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 Basildon
Basildon 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 Basildon
Do you cover Basildon?
Yes. We cover Basildon (SS14, SS15 and SS16) and the surrounding area, including Pitsea and Stanford-le-Hope. The first site visit is free.
What does a two-storey extension cost in Basildon?
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 Basildon do you cover?
Everywhere around it, including Pitsea (2.2 miles), Stanford-le-Hope (3.3 miles) and Wickford (4.1 miles), and the rest of Essex.