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Permitted22/01190/FULLSubmitted 4 years agoLoft conversion

39 Marylebone High Street Westminster W1U 4QQ

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.

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Progress

Submitted
8 Mar 2022
— completed
Validated
8 Mar 2022
— completed
Consultation
27 Jun 2022
— completed
Target date
3 May 2022
— completed
Decided
21 Jun 2022
— completed

Application details

Reference
22/01190/FULL
Local authority
Westminster
Postcode
W1U 4QQ
Ward
MHC_02
Application type
All Other
Property type
House

Key dates

Submitted
8 Mar 2022
Validated
8 Mar 2022
Comments close
27 Jun 2022
Target decision
3 May 2022
Decided
21 Jun 2022

Estimated project value

£140k–£290k

Based on the 85.9m² of floor area stated in the application, at inner London rates (2026). Source: Checkatrade 2026, loft conversion £1,200-£2,500/m².

Floor area gained: 85.9

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.

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