12 Hallam Street Westminster W1W 6JF
Replacement of windows with double-glazed timber sash windows at the front and aluminium ones at the rear; installation of air conditioning unit at roof level; and addition of a rear extension at part third, fourth and fifth floors.
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Progress
Application details
- Reference
- 22/05297/FULL
- Local authority
- Westminster
- Postcode
- W1W 6JF
- Ward
- WEW_22
- Application type
- All Other
- Property type
- House
Key dates
- Submitted
- 22 Aug 2022
- Validated
- 22 Aug 2022
- Comments close
- 23 Sept 2022
- Target decision
- 17 Oct 2022
- Decided
- 14 Oct 2022
Estimated project value
£20k–£34k
Based on the 8.3m² 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: 8.3m²
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.
- FLAT 3, 110 GREAT PORTLAND STREET, LONDON, W1W 6PQFlat or maisonette · Leasehold · £820,0002 months ago15 Jun 2026
- FLAT 63, 49 HALLAM STREET, LONDON, W1W 6JPFlat or maisonette · Leasehold · £485,0002 months ago10 Jun 2026
- FLAT M, STONE HOUSE, 9 WEYMOUTH STREET, LONDON, W1W 6DBFlat or maisonette · Leasehold · Not a standard market sale · £685,0003 months ago22 May 2026
- APARTMENT 5, 90 GREAT PORTLAND STREET, LONDON, W1W 7NTFlat or maisonette · Leasehold · £1,750,0004 months ago1 May 2026
- FLAT 2, COLLINGWOOD HOUSE, 103 NEW CAVENDISH STREET, LONDON, W1W 6XHFlat or maisonette · Leasehold · £817,3504 months ago27 Apr 2026
- FLAT 3, THE TOWN HOUSE, 105 HALLAM STREET, LONDON, W1W 5HDOther · Not a standard market sale · £4,750,0004 months ago23 Apr 2026
- SECOND FLOOR FLAT, 95 GREAT TITCHFIELD STREET, LONDON, W1W 6RRFlat or maisonette · Leasehold · £670,0004 months ago13 Apr 2026
- FLAT 7, 21 - 22 NASSAU STREET, LONDON, W1W 7AGFlat or maisonette · Leasehold · £725,0005 months ago27 Mar 2026
Homes here go for about £771,175 — the median of the last 6 market sales in W1W (the wider postcode district), £485,000 to £1,750,000.
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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