26/02952/NMAPlanning Application 26/02952/NMA

Amendment application at 17 William Mews London SW1X 9HF, Westminster. View planning documents, track the decision and get email alerts on updates.

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Amendments to planning permission dated 12 June 2025 (RN: 24/07507/FULL) for the erection of a roof extension and alterations to existing front elevation and fenestration. Excavation of a new basement below part existing dwellinghouse.; NAMELY minor amendments to the ground floor front elevation including revisions to the approved window openings, together with associated minor internal reconfiguration works.

26/02952/NMA

Small

Amendment

17 William Mews London SW1X 9HF

SubmittedSubmitted5 May

ValidatedValidated

ConsultationConsultation

TargetTarget Date

DecidedDecided

7 weeks typical decision time in Westminster80% of amendment applications approved

This is an application to amend a permission at 17 William Mews London SW1X 9HF. Westminster has handled 604 applications of this type and approves 80% of them, typically deciding them in 40 days. It was submitted on 5 May 2026 and is still awaiting a decision. The site is in 2 listed buildings nearby. There have been 2 other applications at this address. In the past year there have been 417 applications across Knightsbridge & Belgravia. We hold 636 applications in total for the SW1X postcode area.