Two-storey extensions in Upminster
We design, get approval for and build two-storey extensions in Upminster and the surrounding area. Choose the type of extension below or book a free site visit.
Upminster at a glance
- Postcode districts
- RM14
- Area
- Greater London, England
- Price region
- London
- Nearest towns
- Emerson Park (1.7 miles), Hornchurch (1.7 miles), Elm Park (2.8 miles), Harold Wood (2.8 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 Upminster we also work in Emerson Park, Hornchurch and Elm Park, and across the rest of Greater London. Postcode district in and near Upminster: RM14.
Extensions available in Upminster
Two-storey rear extensions
From £67,000 in Upminster. Free visit to firm it up.
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Two-storey side extensions
Our London guide starts at £103,500 for this type.
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Two-storey wraparound extensions
Our London guide starts at £144,500 for this type.
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Part single, part two-storey extensions
From £86,500 in Upminster. Free visit to firm it up.
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Extensions over a garage
Guide from £38,000 in Upminster, including VAT.
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First-floor extensions
Design, approvals and build for Upminster homes. Guide from £30,000.
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Two-storey extensions for semi-detached houses
From £67,000 in Upminster. Free visit to firm it up.
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Two-storey extensions for detached houses
Guide from £103,500 in Upminster, including VAT.
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Kitchen extensions with bedrooms above
Upminster guide price from £67,000 (before kitchen units), Standard spec.
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Extra bedroom and en-suite extensions
Design, approvals and build for Upminster homes. Guide from £67,000 (plus en-suite).
Learn moreWhich type suits your house?
Rear and side extensions suit most semi-detached and detached houses with room around them. Terraced and town-centre homes can take a two-storey extension too, with more care over neighbours, light and access.
Also available in Greater London
- 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 Upminster
Upminster 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 Upminster
Do you cover Upminster?
Yes. We cover Upminster (RM14) and the surrounding area, including Emerson Park and Hornchurch. The first site visit is free.
What does a two-storey extension cost in Upminster?
Using our London 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 £67,000–£90,500 including VAT. An extension over a garage is about £38,000–£55,000.
Which other places near Upminster do you cover?
Everywhere around it, including Emerson Park (1.7 miles), Hornchurch (1.7 miles) and Elm Park (2.8 miles), and the rest of Greater London.