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Permitted23/00256/NMASubmitted 3 years agoLoft conversion

150, 156 Piccadilly Westminster W1J 9BR

Amendments to planning permission dated 12 July 2022 (RN: 21/07264/FULL) for alterations and extensions to the Ritz Hotel and William Kent House including the change of use of the casino to a dual flexible use as hotel and/or private members club, a two storey side extension to William Kent House, extensions to the Ritz hotel including on the site of 22 Arlington Street comprising an extension of five basements, lower ground, ground, mezzanine and seven upper floors to provide additional hotel floorspace, new and upgraded hotel facilities including hotel rooms, restaurant and spa, new entrances on Arlington Street, arrival and drop off facilities, changes to the servicing and refuse facilities, car and cycle parking, plant, landscaping and all works including demolition, enabling, highways and other ancillary works. Namely, minor alterations to the ground and upper floors of William Kent House (WKH) and the triangular staircase in the Ritz building; and external works to WKH including re-spacing balcony columns; ground floor external door detailed with light; first floor French windows cills lowered; new soil pipe to south west façade; Increased scope of slate replacement; relocated position of access hatch and dormer; new access ladder; windows and dormer louvre modification and to junction between Winter Garden and WKH.

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Progress

Submitted
16 Jan 2023
— completed
Validated
16 Jan 2023
— completed
Consultation
—
— completed
Target date
13 Feb 2023
— completed
Decided
15 Mar 2023
— completed

Application details

Reference
23/00256/NMA
Local authority
Westminster
Postcode
W1J 9BR
Ward
SJW_22
Application type
All Other
Property type
Commercial

Key dates

Submitted
16 Jan 2023
Validated
16 Jan 2023
Target decision
13 Feb 2023
Decided
15 Mar 2023

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

New owners, recently moved in. First work on a house usually follows within months of completing. 8 recent sales are listed below.

Homes here go for about £3,210,000 — the median of the last 4 market sales in W1J (the wider postcode district), £632,000 to £5,488,000.

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