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Pending26/06154/FULLSubmitted yesterdayLoft conversion

24 Castellain Road Westminster W9 1EZ

Use of part of the existing main flat roof as a private residential roof terrace; installation of black painted metal balustrading/railings; provision of safe access to the roof terrace via a sliding rooflight; installation of an Air Source Heat Pump (ASHP) at roof terrace level; construction of enlarged dormer and a terrace the rear of the 3rd floor; and associated works.

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Progress

Submitted
15 Sept 2026
— completed
Validated
15 Sept 2026
— completed
Consultation
—
— not yet reached
Target date
10 Nov 2026 (target)
— not yet reached
Decided
—
— not yet reached

Application details

Reference
26/06154/FULL
Local authority
Westminster
Postcode
W9 1EZ
Ward
LVW_22
Application type
All Other
Property type
Flat

Key dates

Submitted
15 Sept 2026
Validated
15 Sept 2026
Target decision
10 Nov 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

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.

Nearby applications