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Permitted26/02814/FULLSubmitted 6 months agoRear extension

33 St James's Square Westminster SW1Y 4JS

Variation of conditions 1, 11, 16, 24 and 25 of planning permission dated 19 October 2020 (RN: 20/03222/FULL) for the partial demolition and reconstruction of enlarged rear extension with additional storey; formation of terraces at ground, fourth, fifth and sixth floor levels; excavation to extend existing basement level; installation of plant machinery; internal alterations including installation of new grand stair; and associated external alterations in connection with increase in office floorspace (Class B1), NAMELY to make changes to the approved drawings to allow changes to extend the lift overrun, remodelling of the roofscape, introduction of a secondary external staircase, omission of sixth floor east elevation terrace, amendments to elevations, plant reconfiguration and internal works. This also includes variations to Condition 11 (Roof Terrace), Condition 16 (Operational Management Plan), Condition 24 (Roof Terrace Hours) and Condition 25 (Charles II Street crossover).

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Progress

Submitted
29 Apr 2026
— completed
Validated
29 Apr 2026
— completed
Consultation
4 Jun 2026
— completed
Target date
29 Jul 2026
— completed
Decided
11 Sept 2026
— completed

Application details

Reference
26/02814/FULL
Local authority
Westminster
Postcode
SW1Y 4JS
Ward
SJW_22
Application type
All Other
Property type
Commercial

Key dates

Submitted
29 Apr 2026
Validated
29 Apr 2026
Comments close
4 Jun 2026
Target decision
29 Jul 2026
Decided
11 Sept 2026

Estimated project value

£41k–£75k

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: MyJobQuote / Checkatrade 2026, ~20m² at £1,800-£3,000/m².

Recently sold nearby

Inside the two years most owners do their major work — kitchens, bathrooms, rewires and lofts.

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.

Recorded changes

  • 12 Sept 2026: Approved
  • 11 Sept 2026: The proposal was amended

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