43, 45 Portman Square Westminster W1H 6LY
Variation of Condition 1 of planning permission dated 7th April 2025 (RN: 24/04987/FULL) for, 'Partial demolition of the existing roof and removal of plant equipment; construction of a roof extension providing new office (Class E) floorspace with associated external amenity spaces and plant equipment; refurbishment of the existing building, including infilling of the existing atrium; alterations to the existing façade; provision of cycle parking spaces and end of journey facilities, and all associated and ancillary works'; Namely,the retention of existing cores, the infilling of atria, the provision of additional rooflights to the western 3rd floor terrace, layout changes at ground and lower ground levels and changes to some windows on the eastern façade and retention of existing first floor windows, resulting in single storey full height glazing to the retail frontages along Orchard Street (Application under Section 73 of the Act).
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Progress
Application details
- Reference
- 25/06153/FULL
- Local authority
- Westminster
- Postcode
- W1H 6LY
- Ward
- WEW_22
- Application type
- All Other
- Property type
- Commercial
Key dates
- Submitted
- 15 Oct 2025
- Validated
- 15 Oct 2025
- Comments close
- 10 Oct 2025
- Target decision
- 14 Jan 2026
- Decided
- 22 Apr 2026
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.
- FLAT 8, CRANFIELD COURT HOMER STREET, LONDON, W1H 4NBFlat or maisonette · Leasehold · £485,0002 months ago19 Jun 2026
- 18 BRYANSTON MEWS WEST, LONDON, W1H 2DDFlat or maisonette · Leasehold · £1,825,0002 months ago17 Jun 2026
- FLAT D, 30 UPPER MONTAGU STREET, LONDON, W1H 1RPFlat or maisonette · Leasehold · £860,0003 months ago9 Jun 2026
- BASEMENT FLAT, 13 WYNDHAM PLACE, LONDON, W1H 2PYFlat or maisonette · Leasehold · £805,0003 months ago5 Jun 2026
- FLAT 32, CRANFIELD COURT HOMER STREET, LONDON, W1H 4NFFlat or maisonette · Leasehold · Not a standard market sale · £350,0004 months ago8 May 2026
- FLAT 6, 14 - 15 MOLYNEUX STREET, LONDON, W1H 5HQFlat or maisonette · Leasehold · £570,0004 months ago8 May 2026
- 7 TARRANT PLACE, LONDON, W1H 1ADTerraced · Leasehold · £1,550,0004 months ago29 Apr 2026
- 2, 114 SEYMOUR PLACE, LONDON, W1H 1NNFlat or maisonette · Leasehold · £375,0005 months ago27 Mar 2026
Homes here go for about £805,000 — the median of the last 7 market sales in W1H (the wider postcode district), £375,000 to £1,825,000.
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
- 43, 45 Portman Square Westminster W1H 6LYPermittedNext door
- 43, 45 Portman Square Westminster W1H 6LYPermittedNext door
- 43, 45 Portman Square Westminster W1H 6LYPermittedNext door
- 43, 45 Portman Square Westminster W1H 6LYRefusedNext door
- 43, 45 43-45 Portman Square Westminster W1H 6LYPermittedNext door
- 43, 45 Portman Square Westminster W1H 6LYPermittedNext door