1 Marylebone High Street Westminster W1U 4DL
Rear extension to existing building, formation of new roof terrace including rooftop pavilion, new external plant, replacement of existing windows with double glazing and minor alterations to building facade including new entrance.
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Progress
Application details
- Reference
- 24/08179/FULL
- Local authority
- Westminster
- Postcode
- W1U 4DL
- Ward
- MBW_22
- Application type
- All Other
- Property type
- House
Key dates
- Submitted
- 5 Dec 2024
- Validated
- 5 Dec 2024
- Comments close
- 10 Feb 2025
- Target decision
- 30 Jan 2025
- Decided
- 18 Jun 2025
Estimated project value
£4420k–£7365k
Based on the 1,819m² of floor area stated in the application, at inner London rates (2026). Source: FMB / Checkatrade 2026, single-storey extension £1,800-£3,000/m².
Floor area gained: 1,819m²
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.
- THIRD FLOOR FLAT 5, 36 NOTTINGHAM PLACE, LONDON, W1U 5NTFlat or maisonette · Leasehold · £827,5003 months ago29 May 2026
- FLAT 9, 30 BLANDFORD STREET, LONDON, W1U 4BYFlat or maisonette · Leasehold · £1,500,0003 months ago19 May 2026
- 61, LUXBOROUGH TOWER LUXBOROUGH STREET, LONDON, W1U 5BNFlat or maisonette · Leasehold · £685,0003 months ago18 May 2026
- 209, BICKENHALL MANSIONS BICKENHALL STREET, LONDON, W1U 6BWFlat or maisonette · Leasehold · £1,300,0004 months ago5 May 2026
- 23 YORK STREET, LONDON, W1U 6PFOther · Leasehold · Not a standard market sale · £2,700,0004 months ago30 Apr 2026
- FLAT 18, ST ANDREWS MANSIONS DORSET STREET, LONDON, W1U 4EQFlat or maisonette · Leasehold · Not a standard market sale · £1,750,0005 months ago8 Apr 2026
- PARKING SPACE 10, BICKENHALL MANSIONS BICKENHALL STREET, LONDON, W1U 6BXOther · Leasehold · Not a standard market sale · £85,0005 months ago30 Mar 2026
- FLAT 5, 43A CHILTERN STREET, LONDON, W1U 6LTFlat or maisonette · Leasehold · £1,175,0005 months ago27 Mar 2026
Homes here go for about £1,175,000 — the median of the last 5 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
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