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Refused22/04741/NMASubmitted 4 years agoLoft conversion

39 Marylebone High Street Westminster W1U 4QQ

Amendments to planning permission 21st June 2022 (RN: 22/01190/FULL) Erection of a rear mansard style roof extension to enlarge dwelling (Class C3) and installation of new double-glazed windows on front and rear elevations of the building. NAMELY; installation of an additional conservation roof light and the use of lead at new flat roof level.

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Progress

Submitted
15 Jul 2022
— completed
Validated
15 Jul 2022
— completed
Consultation
— completed
Target date
12 Aug 2022
— completed
Decided
27 Jul 2022
— completed

Application details

Reference
22/04741/NMA
Local authority
Westminster
Postcode
W1U 4QQ
Ward
MBW_22
Application type
All Other
Property type
Flat

Key dates

Submitted
15 Jul 2022
Validated
15 Jul 2022
Target decision
12 Aug 2022
Decided
27 Jul 2022

Estimated project value

£37k–£100k

Typical UK cost for this job type, at inner London rates (2026). Estimated from the proposal description — planning applications do not state build cost. Source: Checkatrade 2026 loft conversion cost guide.

Recently sold nearby

New owners, recently moved in. First work on a house usually follows within months of completing. 8 recent sales are listed below.

Homes here go for about £1,325,000 — the median of the last 6 market sales in W1U (the wider postcode district), £685,000 to £1,500,000.

Contains HM Land Registry data © Crown copyright and database right 2026. This data is licensed under the Open Government Licence v3.0. Sales are matched by postcode, not by property, so a sale listed here may be a neighbouring address. England and Wales only.

Planning constraints

No designations recorded at this location. This is not a formal search — always confirm with the local authority before relying on it.

Designations from planning.data.gov.uk, Open Government Licence v3.0. Indicative only — not a formal local authority search.

Nearby applications