Two-storey extensions in Chadwell St Mary
Homeowners in Chadwell St Mary can use us for the whole project or just the drawings and approvals. Start with a free visit.
Chadwell St Mary at a glance
- Postcode districts
- RM16
- Area
- Essex, England
- Price region
- East of England
- Nearest towns
- Tilbury (1.3 miles), Grays (1.7 miles), Gravesend (2.7 miles), Chafford Hundred (3 miles)
- Distance to Southend-on-Sea
- about 15.6 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 Chadwell St Mary (RM16) and the places around it, including Tilbury (1.3 miles), Grays (1.7 miles) and Gravesend.
Extensions available in Chadwell St Mary
Two-storey rear extensions
Chadwell St Mary guide price from £57,500, Standard spec.
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Two-storey side extensions
For homes in Chadwell St Mary: typical guide from £88,500.
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Two-storey wraparound extensions
Guide from £124,000 in Chadwell St Mary, including VAT.
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Part single, part two-storey extensions
Guide from £74,000 in Chadwell St Mary, including VAT.
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Extensions over a garage
Design, approvals and build for Chadwell St Mary homes. Guide from £32,500.
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First-floor extensions
From £26,000 in Chadwell St Mary. Free visit to firm it up.
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Two-storey extensions for semi-detached houses
For homes in Chadwell St Mary: typical guide from £57,500.
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Two-storey extensions for detached houses
From £88,500 in Chadwell St Mary. Free visit to firm it up.
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Kitchen extensions with bedrooms above
Guide from £57,500 (before kitchen units) in Chadwell St Mary, including VAT.
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Extra bedroom and en-suite extensions
Chadwell St Mary guide price from £57,500 (plus en-suite), Standard spec.
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 Chadwell St Mary we also design annexes, home offices and bedrooms over garages.
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 Chadwell St Mary
Chadwell St Mary 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 Chadwell St Mary
Do you cover Chadwell St Mary?
Yes. We cover Chadwell St Mary (RM16) and the surrounding area, including Tilbury and Grays. The first site visit is free.
What does a two-storey extension cost in Chadwell St Mary?
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 Chadwell St Mary do you cover?
Everywhere around it, including Tilbury (1.3 miles), Grays (1.7 miles) and Gravesend (2.7 miles), and the rest of Essex.