21 Eastcastle Street Westminster W1W 8DA
Erection of a mansard extension at 3rd floor level and dormer infill extension at 2nd floor level. Removal of existing skylight and creation of a 2nd floor terrace served by new level access steps and enclosed by a guardrail.
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Progress
Application details
- Reference
- 25/03064/FULL
- Local authority
- Westminster
- Postcode
- W1W 8DA
- Ward
- WEW_22
- Application type
- All Other
- Property type
- House
Key dates
- Submitted
- 13 May 2025
- Validated
- 13 May 2025
- Comments close
- 19 Jun 2025
- Target decision
- 8 Jul 2025
- Decided
- 7 Jul 2025
Estimated project value
£41k–£86k
Based on the 25.4m² 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: 25.4m²
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 25, GOODWOOD COURT, 54 - 57 DEVONSHIRE STREET, LONDON, W1W 5EFFlat or maisonette · Leasehold · Not a standard market sale · £775,0002 months ago21 Aug 2026
- FLAT 19, GOODWOOD COURT, 54 - 57 DEVONSHIRE STREET, LONDON, W1W 5EFFlat or maisonette · Leasehold · £650,0003 months ago17 Jul 2026
- FLAT 10, 43 - 51 GREAT TITCHFIELD STREET, LONDON, W1W 7PQFlat or maisonette · Leasehold · £1,100,0003 months ago9 Jul 2026
- FLAT 11, GOODWOOD COURT, 54 - 57 DEVONSHIRE STREET, LONDON, W1W 5DZFlat or maisonette · Leasehold · £510,0003 months ago29 Jun 2026
- FLAT 5, 28 - 29 GOSFIELD STREET, LONDON, W1W 6HHOther · Leasehold · Not a standard market sale · £380,0004 months ago17 Jun 2026
- FLAT 3, 110 GREAT PORTLAND STREET, LONDON, W1W 6PQFlat or maisonette · Leasehold · £820,0004 months ago15 Jun 2026
- APARTMENT 2, 8 BOURLET CLOSE, LONDON, W1W 7BNFlat or maisonette · Leasehold · £1,150,0004 months ago12 Jun 2026
- FLAT 63, 49 HALLAM STREET, LONDON, W1W 6JPFlat or maisonette · Leasehold · £485,0004 months ago10 Jun 2026
Homes here go for about £735,000 — the median of the last 6 market sales in W1W (the wider postcode district), £485,000 to £1,150,000.
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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