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Planning application

25/01205/FULL

Lord Mayors Residence The Mansion House Mansion House Street London EC4N 8BH

Granted City of London Full Planning Permission

Proposal

Installation of Air Source Heat Pumps and Photovoltaic panels at roof level and associated infrastructure and works.

As published by the council, reference 25/01205/FULL

Timeline

Dates from the published record

  1. 2 Sep 2025

    Received by City of London

  2. 13 Apr 2026

    Decision issued: Approved

  3. 24 Jul 2026

    Added to PlanIndex

What a grant of permission means

The process from here

Permission has been granted, usually subject to conditions listed on the decision notice, some of which must be discharged before work starts. The decision notice on the council portal sets out exactly what was approved.

Work must normally begin within three years of the decision or the permission lapses. Neighbours cannot appeal a grant; challenging one means judicial review of how the decision was made, within tight time limits.

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

Nearby applications

Within 500 metres

  • 25/01206/LBC Granted

    Lord Mayors Residence The Mansion House Mansion House Street London EC4N 8BH

    Installation of Air Source Heat Pumps and Photovoltaic panels at roof level and associated infrastructure and works.

    2 Sep 2025 0m away Heritage and listed buildings
  • 24/00947/LBC Granted

    The Mansion House Mansion House Street London EC4N 8BH

    Proposed installation of Quattro Seal draughtproofing treatment to windows at The Mansion House.

    30 Aug 2024 0m away Heritage and listed buildings
  • 25/01301/5REG Decided

    3 Lombard Street London EC3V 9AA

    Notification in accordance with The Electronic Communications Code, The Electronic Communications Code (Conditions and restrictions) Regulations 2003 (as amended) Regulation 7 & 7A (listed buildings and ancient monuments) and the relevant Planning Act to install fixed line broadband electronic communications apparatus, detailed as install 25 meters of internal cable at the above location, which is a building identified in the statutory list of buildings.

    19 Sep 2025 50m away
  • 26/00769/LBC Awaiting decision

    1 Lombard Street London EC3V 9AA

    Internal alterations at basement and ground floor level in association with existing restaurant.

    27 May 2026 50m away Heritage and listed buildings
  • 25/01398/FULL Awaiting decision

    Scottish Provident Building 1 - 6 Lombard Street London EC3V 9AA

    External alterations comprising of: (i) the installation of signage; (ii) the installation of lighting; (iii) the installation of plaques; and (iv) the installation of planters.

    10 Oct 2025 50m away Full applications
  • 25/01399/ADVT Awaiting decision

    Scottish Provident Building 1 - 6 Lombard Street London EC3V 9AA

    The installation and display of: (i) 1x internally illuminated projecting sign measuring 1.17m in width, 0.58m high and at a height of 2.73m above ground level; (ii) 1x internally illuminated fascia sign measuring 3.26m in width, 0.61m high and at a height of 3.82m above ground level; (iii) 1x internally illuminated fascia sign measuring 3.05m in width, 0.6m high and at a height of 3.82m above ground level; (iv) 1x internally illuminated menu box measuring 0.42m in width, 0.64m high and at a height of 1.425m above ground level; (v) 1x internally illuminated Edmondo brass plaque measuring 0.395m in width, 0.23m high, at a height of 1.27m above ground level; (vi) 1x internally illuminated No. 6 brass plaque measuring 0.395m in width, 0.23m high and at a height of 1.27m above ground level.

    10 Oct 2025 50m away Advertising

In City of London

  • 26/01052/FULL Awaiting decision

    55 Mark Lane London EC3R 7NE

    Installation of new air condenser units and new railing at the south east part of the flat roof and associated works.

    27 Jul 2026 Full applications
  • 26/00826/FULL Granted

    88 Wood Street London EC2V 7DA

    Installation of a double set of doors to be formed within the existing glazed curtain wall at Level 12 roof terrace.

    8 Jun 2026 Full applications
  • 26/00797/FULL Granted

    1 London Wall Place London EC2Y 5AU

    Installation of three metal mechanical louvred ventilation panels at upper ground level in the Fore Street elevation of 1 London Wall Place.

    2 Jun 2026 Full applications
  • 26/00113/FULL Granted

    Salters Hall Gardens St Alphage Garden London EC2

    Landscaping comprising (i) replacing of soft landscaping (12sqm of lawn and 26sqm of planting bed) with 38sqm of paving; (ii) Replacement of 41sqm of gravel surface with soft landscaped area comprising high quality diverse pollinator friendly planting; (iii) Provision of 48m linear of new hedgerow.

    26 Jan 2026 Full applications
  • 26/00573/FULL Granted

    International Financial Centre 25 Old Broad Street London EC2N 1HQ

    Installation of a canopy to the eastern elevation of the building.

    21 Apr 2026 Full applications