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Planning application

26/00991/LBC

Basement And Ground Floor 12 Mount Street London W1K 2RD

Awaiting decision Westminster Listed Building Consent Application

Proposal

Retrospective consent for the installation of an external condenser unit at lower ground floor level in the front lightwell and internal alterations at lower ground floor level. [Linked to 26/00990/FULL]

As published by the council, reference 26/00991/LBC

Timeline

Dates from the published record

  1. 17 Feb 2026

    Received by Westminster

  2. 21 Jul 2026

    Added to PlanIndex

  3. Decision

    Awaiting decision

    The statutory target is eight weeks for most applications and thirteen for major development. Extensions of time are common.

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 heritage and listed buildings applications

How this application type works

Heritage applications concern listed buildings and conservation areas. Listed building consent is needed for works, inside or out, that affect the special interest of a listed building, and carrying out such works without consent is a criminal offence. The council weighs harm to the heritage asset against any public benefit of the proposal.

More on heritage and listed buildings applications in our guide

Nearby applications

Within 500 metres

  • 26/00990/FULL Awaiting decision

    Basement And Ground Floor 12 Mount Street London W1K 2RD

    Retrospective consent for the installation of an external condenser unit at lower ground floor level in the front lightwell and internal alterations at lower ground floor level. [Linked to 26/00991/LBC]

    17 Feb 2026 0m away Full applications
  • 26/01651/LBC Awaiting decision

    11 Mount Street London W1K 2RB

    Installation of automatic opening fire vent at top floor of 11 Mount Street accommodation and fire exit stair core to residential apartments which occupy 1st floor to roof level. [Linked to 26/01869/FULL]

    13 Mar 2026 1m away Heritage and listed buildings
  • 26/01869/FULL Awaiting decision

    11 Mount Street London W1K 2RB

    Installation of automatic opening fire vent at top floor of 11 Mount Street accommodation and fire exit stair core to residential apartments which occupy 1st floor to roof level. [Linked to 26/01651/LBC]

    23 Mar 2026 2m away Full applications
  • 12/05083/LBC Granted

    Flat 1 11 Mount Street London W1K 2RB

    Internal alterations at first floor level

    11 May 2012 2m away Heritage and listed buildings
  • 26/04797/LBC Awaiting decision

    Connaught Hotel Carlos Place London W1K 2AL

    Re-pointing of mortar on Mount Street, Carlos Place and Adams Row elevations with lime mortar to match original existing mortar.

    17 Jul 2026 32m away Heritage and listed buildings
  • 26/04571/ADFULL Awaiting decision

    Flat 5 110 Mount Street London W1K 2TS

    Details of noise report pursuant to condition 3 of planning permission dated 18 April 2023 (RN: 23/00903/FULL)

    8 Jul 2026 56m away Full applications

In Westminster

  • 26/04984/LBC Awaiting decision

    47G Randolph Avenue London W9 1BQ

    Installation of replacement fire surround.

    24 Jul 2026 Heritage and listed buildings
  • 26/04997/LBC Awaiting decision

    Hanover Lodge Outer Circle Regent's Park London NW1 4HB

    Erection of a morning room side extension. (Linked to 26/04996/FULL)

    24 Jul 2026 Heritage and listed buildings
  • 26/04979/LBC Awaiting decision

    12 Brewer Street London W1F 0SF

    Internal alterations including removal of internal enclosures; Replacement flooring, shelving and slatwall systems, staircase handrail repair and other associated joinery works.

    24 Jul 2026 Heritage and listed buildings
  • 26/04987/LBC Awaiting decision

    Basement And Ground Floor 8 Ganton Street London W1F 7QL

    Repainting of the existing timber shopfront, hand-painted fascia lettering, installation of a new hanging sign using the existing projecting sign bracket, and installation of a discreet fascia-mounted LED trough light.

    24 Jul 2026 Heritage and listed buildings
  • 26/04995/LBC Awaiting decision

    Hanover Lodge Outer Circle Regent's Park London NW1 4HB

    Erection of rear conservatory extensions and an entrance loggia to side with roof terrace above, together with associated landscaping and alterations. (Linked with 26/04994/FULL)

    24 Jul 2026 Heritage and listed buildings