Two-storey extensions in Marylebone
From over-garage bedrooms to full wraparounds, we cover every kind of two-storey extension in Marylebone.
Marylebone at a glance
- Postcode districts
- NW1 and W1
- Area
- Greater London, England
- Price region
- London
- Nearest towns
- Little Venice (0.6 miles), Maida Hill (0.9 miles), Bayswater (1.2 miles), Chalk Farm (1.5 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 Marylebone (NW1 and W1) and the places around it, including Little Venice (0.6 miles), Maida Hill (0.9 miles) and Bayswater.
Extensions available in Marylebone
Two-storey rear extensions
Design, approvals and build for Marylebone homes. Guide from £67,000.
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Two-storey side extensions
For homes in Marylebone: typical guide from £103,500.
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Two-storey wraparound extensions
For homes in Marylebone: typical guide from £144,500.
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Part single, part two-storey extensions
Design, approvals and build for Marylebone homes. Guide from £86,500.
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Extensions over a garage
For homes in Marylebone: typical guide from £38,000.
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First-floor extensions
From £30,000 in Marylebone. Free visit to firm it up.
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Two-storey extensions for semi-detached houses
For homes in Marylebone: typical guide from £67,000.
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Two-storey extensions for detached houses
For homes in Marylebone: typical guide from £103,500.
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Kitchen extensions with bedrooms above
Design, approvals and build for Marylebone homes. Guide from £67,000 (before kitchen units).
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Extra bedroom and en-suite extensions
Our London guide starts at £67,000 (plus en-suite) for this type.
Learn moreWhich type suits your house?
Which type suits your house in Marylebone depends mostly on where you have room. A deep garden points to a rear extension; space beside the house points to a side or over-garage extension; a house that already has a single-storey extension can often take a first floor on top.
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 Marylebone
Marylebone 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 Marylebone
Do you cover Marylebone?
Yes. We cover Marylebone (NW1 and W1) and the surrounding area, including Little Venice and Maida Hill. The first site visit is free.
What does a two-storey extension cost in Marylebone?
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 Marylebone do you cover?
Everywhere around it, including Little Venice (0.6 miles), Maida Hill (0.9 miles) and Bayswater (1.2 miles), and the rest of Greater London.