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Planning application

Byron House 7 - 9 St James's Street London SW1A 1EE

Awaiting decision Westminster 26/05166/FULL Full applications

Works: Extension Windows or glazing

Still open. Anyone can comment while the consultation period runs, and comments go to the council rather than to us.

Proposal

Variation of conditions 4 and 5 of planning permission dated 16 June 2025 (RN: 25/03133/FULL) for the: Remodelling of existing seventh floor roof extension including enlarged window openings, timber louvres to existing plant area and creation of roof terrace with metal balustrade and planter boxes. NAMELY, to allow extending the hours of operation; making it available for third party use; and allowing for the playing of music.

As published by the council, reference 26/05166/FULL

Application record

Reference
26/05166/FULL
Category
Full applications
Status
Pending
Received
31 Jul 2026
Validated
31 Jul 2026
Postcode
SW1A 1EE

Timeline

Dates from the published record

  1. 31 Jul 2026

    Received by Westminster

  2. 9 Aug 2026

    Added to PlanIndex

  3. Decision

    Awaiting decision

    Decision expected by 25 September 2026, 8 weeks from validation under the statutory target for most applications. Extensions of time are common and are agreed case by case.

    Westminster took a median of 61 days over the applications it decided in the last year.

What happens while it is decided

The process from here

This application is with Westminster for determination. The council publicises it, consults neighbours and technical bodies where required, and weighs the responses against local and national planning policy.

The statutory target is eight weeks for most applications and thirteen for major development, though extensions of time are common. Comments carry most weight while the case is undecided, so check the council portal for the deadline if you want to respond.

About full applications applications

How this application type works

A full application seeks permission for a complete, detailed proposal in one go: siting, design, access and landscaping are all fixed at this stage. It is the standard route for new buildings, conversions and changes of use. The statutory target is eight weeks for smaller schemes and thirteen weeks for major development, though complex cases often take longer by agreement.

More on full applications applications in our guide

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