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Permitted22/04118/FULLSubmitted 4 years agoLoft conversion

18 Castellain Road Westminster W9 1EZ

Replacement of roof, windows, doors and associated alterations to front and rear elevations; Replacement of rear dormer with larger dormer, installation of rooflight and creation of balcony at roof-level; Creation of balcony at ground floor level with new stair access leading to rear garden; Formation of new windows and doors to rear at ground and lower ground floor levels; associated with reconfiguration of existing flats (1 x 1 bed and 1 x 4 bed).

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Progress

Submitted
13 Jul 2022
— completed
Validated
13 Jul 2022
— completed
Consultation
17 Aug 2022
— completed
Target date
7 Sept 2022
— completed
Decided
2 Nov 2022
— completed

Application details

Reference
22/04118/FULL
Local authority
Westminster
Postcode
W9 1EZ
Ward
LVW_22
Application type
All Other
Property type
Flat

Key dates

Submitted
13 Jul 2022
Validated
13 Jul 2022
Comments close
17 Aug 2022
Target decision
7 Sept 2022
Decided
2 Nov 2022

Estimated project value

£10k–£21k

Based on the 6.0m² 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: 6m²

Recently sold nearby

Inside the two years most owners do their major work — kitchens, bathrooms, rewires and lofts. 4 recent sales are listed below.

Homes here go for about £800,000 — the median of the last 8 market sales in W9 1EZ, £555,000 to £3,000,000.

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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