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Permitted22/06209/FULLSubmitted 4 years agoLoft conversion

54 Northumberland Place Westminster W2 5AS

Excavation of a new basement level to include a small front lightwell; Extend existing, external staircase and railings leading down to lower ground floor; Excavate rear garden down to meet proposed lower ground floor level, Form new lower ground floor extension with bi fold doors; Adapt existing rear outrigger and increase height by 650mm; Install new rear infill conservatory at ground floor level to replace existing; Adapt existing mansard to sit in line with 53; Replace all sash windows with new timber, double glazed windows to match existing in style and proportion; Repair all pointing, stucco, render. Repair or replace all lead flashings. Redecorate all painted elements; Replace front garden brick piers, brick upstand and railings with new stone plinth and iron railings to match neighbouring properties.

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Map of the site

Progress

Submitted
12 Sept 2022
— completed
Validated
12 Sept 2022
— completed
Consultation
26 Oct 2022
— completed
Target date
7 Nov 2022
— completed
Decided
22 Feb 2023
— completed

Application details

Reference
22/06209/FULL
Local authority
Westminster
Postcode
W2 5AS
Ward
BWW_22
Application type
All Other
Property type
House

Key dates

Submitted
12 Sept 2022
Validated
12 Sept 2022
Comments close
26 Oct 2022
Target decision
7 Nov 2022
Decided
22 Feb 2023

Estimated project value

£100k–£215k

Based on the 63.0m² 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: 63m² · 1 additional bedrooms

Recently sold nearby

Inside the two years most owners do their major work — kitchens, bathrooms, rewires and lofts. 2 recent sales are listed below.

Homes here go for about £3,745,000 — the median of the last 8 market sales in W2 5AS, £3,000,000 to £6,075,000.

Contains HM Land Registry data © Crown copyright and database right 2025. 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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