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Permitted18/04008/FULLLoft conversion

348 Kilburn Lane Westminster W9 3EF

Erection of rear extension at second floor level and erection of mansard roof extension and alterations to windows, in connection with the reconfiguration of the upper floors to comprise a flat at first floor level and a maisonette at second and third floor levels (Class C3).

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Progress

Submitted
—
— completed
Validated
—
— completed
Consultation
—
— completed
Target date
—
— completed
Decided
31 Jul 2018
— completed

Application details

Reference
18/04008/FULL
Local authority
Westminster
Postcode
W9 3EF
Ward
QUEEN'S PARK
Application type
All Other
Property type
Flat

Key dates

Decided
31 Jul 2018

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. 8 recent sales are listed below.

Homes here go for about £560,000 — the median of the last 5 market sales in W9 3EF, £410,000 to £600,000.

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