1 Grosvenor Square Westminster W1K 4BN
External alterations to penthouse facade and roof consisting of alterations to the fenestration, including introduction of glazed corners, introduction of a zinc overhang to western facade, installation of two rooflights.
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Progress
Application details
- Reference
- 21/00621/FULL
- Local authority
- Westminster
- Postcode
- W1K 4BN
- Ward
- WEB_02
- Application type
- All Other
- Property type
- House
Key dates
- Submitted
- 8 Feb 2021
- Validated
- 8 Feb 2021
- Comments close
- 11 Mar 2021
- Target decision
- 5 Apr 2021
- Decided
- 30 Mar 2021
Estimated project value
£9k–£25k
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 / BestBuilders 2026 roof replacement, 3-bed semi.
Recently sold nearby
Inside the two years most owners do their major work — kitchens, bathrooms, rewires and lofts. 2 recent sales are listed below.
- THE MAYFAIR RESIDENCE, 1 GROSVENOR SQUARE, LONDON, W1K 4BNOther · Leasehold · Not a standard market sale · £19,125,0007 months ago9 Feb 2026
- THE MAYFAIR RESIDENCE, 1 GROSVENOR SQUARE, LONDON, W1K 4BNFlat or maisonette · Leasehold · Not a standard market sale · £19,125,00023 months ago9 Oct 2024
- APARTMENT 4.5, 1 GROSVENOR SQUARE, LONDON, W1K 4BNFlat or maisonette · Leasehold · £11,263,3602 years ago6 Dec 2023
- APARTMENT 3.8, 1 GROSVENOR SQUARE, LONDON, W1K 4BNFlat or maisonette · Leasehold · £5,000,0002 years ago6 Dec 2023
- APARTMENT 1.7, 1 GROSVENOR SQUARE, LONDON, W1K 4BNFlat or maisonette · Leasehold · £8,000,0002 years ago12 Oct 2023
- APARTMENT 2.5, 1 GROSVENOR SQUARE, LONDON, W1K 4BNFlat or maisonette · Leasehold · £9,255,0002 years ago2 Oct 2023
- APARTMENT 1.5, 1 GROSVENOR SQUARE, LONDON, W1K 4BNFlat or maisonette · Leasehold · £24,500,0003 years ago30 Jun 2023
- APARTMENT 3.5, 1 GROSVENOR SQUARE, LONDON, W1K 4BNFlat or maisonette · Leasehold · £9,250,0003 years ago6 Jun 2023
Homes here go for about £9,252,500 — the median of the last 6 market sales in W1K 4BN, £5,000,000 to £24,500,000.
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
- WestminsterPermittedNext door
- 1 Grosvenor Square Westminster W1K 4BNPermittedNext door
- Grosvenor Square WestminsterPermittedNext door
- Grosvenor Square WestminsterPermittedNext door
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- Grosvenor Square WestminsterPermittedNext door