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Planning application

2 Mansfield Street London W1G 9NZ

Decided Westminster 26/05035/FULL Full applications

Relates to 26/05036/LBC

Decided. The decision notice on the council portal carries the outcome in full, including any conditions.

Proposal

Installation of an external air conditioning condenser unit at main roof level and associated external pipework (Flat 41).

As published by the council, reference 26/05035/FULL

Application record

Reference
26/05035/FULL
Category
Full applications
Status
Decided
Received
27 Jul 2026
Validated
27 Jul 2026
Ward
Marylebone
Postcode
W1G 9NZ

Site history

Applications at this address on the Westminster register

This site has had 3 applications since 2026.

  • 26/05715/LBC Awaiting decision

    2 Mansfield Street London W1G 9NZ

    Installation of full fibre cables on and through the building.

    Submitted 20 Aug 2026 Heritage and listed buildings
  • 26/05036/LBC Decided

    2 Mansfield Street London W1G 9NZ

    Installation of external air conditioning condenser unit at main roof level, associated external pipework and associated internal modifications (Flat 41).

    Submitted 27 Jul 2026 Heritage and listed buildings

Timeline

Dates from the published record

  1. 27 Jul 2026

    Received by Westminster

  2. 4 Aug 2026

    Added to PlanIndex

  3. 15 Sep 2026

    Status changed to Decided

    Previously Pending.

Cases linked to this one on the register

  • 26/05036/LBC Decided

    2 Mansfield Street London W1G 9NZ

    Installation of external air conditioning condenser unit at main roof level, associated external pipework and associated internal modifications (Flat 41).

    Submitted 27 Jul 2026 Heritage and listed buildings

1 later application on the register refers to this one:

  • 26/05036/LBC Decided

    2 Mansfield Street London W1G 9NZ

    Installation of external air conditioning condenser unit at main roof level, associated external pipework and associated internal modifications (Flat 41).

    Submitted 27 Jul 2026 Heritage and listed buildings

Documents

Plans, drawings, consultee responses and the officer's report

10 documents on file for this application

A planning file usually holds the application form, drawings and site plans, consultee responses, the officer's report and the decision notice.

Watch members (£5 a month) open the document list from here.

Open the documents

After the decision

Westminster has decided this application; the outcome above is the register's own wording and the decision notice on the council portal carries the detail. More in our guide to what happens after a planning decision.

About full applications

A full application seeks permission for a complete, detailed proposal in one go, with siting, design, access and landscaping all fixed at this stage. More in our guide to planning application types.

Nearby applications

Within 0.3 miles

  • 2 Mansfield Street London W1G 9NZ

    26/05715/LBC Submitted 20 Aug 2026 50 yards away

    90% historically approved · decision due ~15 Oct

    Installation of full fibre cables on and through the building.

    Awaiting decision Heritage and listed buildings

  • 2 Mansfield Street London W1G 9NZ

    26/05036/LBC Submitted 27 Jul 2026 50 yards away

    90% historically approved · decision due ~21 Sep

    Installation of external air conditioning condenser unit at main roof level, associated external pipework and associated internal modifications (Flat 41).

    Decided Heritage and listed buildings 1 doc

  • 9 Mansfield Street London W1G 9NZ

    25/06413/LBC Submitted 8 Sep 2025 50 yards away

    90% historically approved · decision due ~20 Nov

    External alterations including the installation of replacement windows and doors. Installation of garage doors in place of to two windows on the Mansfield Mews frontage, installation of replacement roof lights, removal of roof lights at main roof level, removal of cantilevered outrigger WC at rear first floor level, alterations to fenestration of the mews portion of the building facing the internal courtyard to mews portion of building. Reconstruct port of brick parapet, installation of plant at main roof level. Internal alterations throughout [SITE INCLUDES 6 MANSFIELD MEWS]

    Awaiting decision Heritage and listed buildings Extension Loft or dormer +2 152 docs

  • 9 Mansfield Street London W1G 9NZ

    25/06412/FULL Submitted 8 Sep 2025 50 yards away

    88% historically approved · decision due ~20 Nov

    Use as building as a single family dwellinghouse (Class C3). External alterations including the installation of replacement windows and doors. Installation of garage doors in place of to two windows on the Mansfield Mews frontage, installation of replacement roof lights, removal of roof lights at main roof level, removal of cantilevered outrigger WC at rear first floor level, alterations to fenestration of the mews portion of the building facing the internal courtyard to mews portion of building. Reconstruct part of brick parapet, installation of plant at main roof level . [SITE INCLUDES 6 MANSFIELD MEWS]

    Awaiting decision Full applications Extension Loft or dormer +2 156 docs
    Domestic

  • Orbis House 5 Mansfield Street London W1G 9NG

    25/08080/CLEUD Submitted 6 Nov 2025 50 yards away

    Confirmation that the material change of use from office to use as a single family dwelling house under planning permission (RN 12/09926/FULL) has taken place and that use as a single family dwelling house is now the building's lawful use.

    Granted Lawful development 25 docs
    Domestic

  • Orbis House 5 Mansfield Street London W1G 9NG

    26/04876/LBC Submitted 21 Jul 2026 50 yards away

    90% historically approved · decision due ~15 Sep

    Provision of guarding system to provide safe access for maintenance across the roof; alteration at south elevations omitting window SFW11 from the new WC, remove the existing RWP from the internal courtyard corner, removal of the existing plastic section of a redundant vent pipe at lower level and retain original lead; new cast iron rain water pipes at west elevation; and internal layout alterations at basement, ground, 2nd, 3rd floors. (Linked with 26/04873/NMA)

    Decided Heritage and listed buildings Windows or glazing

In Westminster

  • 26/05984/FULL Decided

    41 Sutherland Street London SW1V 4JX

    Replacement of front, side and rear windows with double glazed timber framed sash windows and replacement of a door with a double glazed timber framed door.

    Received 2 Sep, published by the council 11 Sep 2026 Full applications
  • 26/06134/FULL Decided

    Flat 10H Hyde Park Mansions Cabbell Street London NW1 5BG

    Replacement of front and rear second floor level windows with slim-profile double-glazed panels, retaining the existing window and door frames.

    Received 8 Sep, published by the council 15 Sep 2026 Full applications
  • 26/07258/FULL Awaiting decision

    16A Croxley Road London W9 3HL

    Installation of air to air heat pumps to offices and bedrooms.

    Received 22 Oct, published by the council 23 Oct 2026 Full applications
  • 26/07193/FULL Awaiting decision

    98 Victoria Street London SW1E 5JL

    Shopfront alterations. (Linked with 26/07194/ADV)

    Received 21 Oct, published by the council 22 Oct 2026 Full applications
  • 26/07187/FULL Awaiting decision

    Ground Floor Flat 151 Portnall Road London W9 3BN

    Erection of a single storey rear extension.

    Received 21 Oct, published by the council 22 Oct 2026 Full applications