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Planning appeal decision

Dismissed8 December 20253369381

20 Conduit Street, London, W1S 2XW

an extension to the rear wing at fifth floor level; replacement of mansard roof slope to rear wing at fourth floor level; replacement windows within existing openings; cleaning and repairs of listed façade; lift shaft extension; replacement of redundant AOV and new plant to roof level

Authority
City of Westminster Council
Appeal type
other · Listed Building Consent & Conservation Area Consent Appeal
Procedure
Written Representations
Development
employment-industrial · Minor offices/R&D/light industry
Inspector
Rogers J

Main issues, as the Inspector framed them

  • Whether the proposal would preserve the Grade II listed building of 20 Conduit Street or its setting, or any of the features of special architectural or historic interest that it possesses
  • The extent to which the proposal would preserve or enhance the character or appearance of the Mayfair Conservation Area
  • Whether the proposal would preserve the setting of the nearby Grade I listed Church of St George, Vestry and Obelisks

What decided it

The magnitude of less than substantial harm to the special interest of the Grade II listed building and the character of the Mayfair Conservation Area was not outweighed by the modest economic benefits of an additional 38 square metres of office floorspace.

Plan policies cited: Policy 38, Policy 39, Policy 40, Policy 13

The main issues and the deciding factor are read from the published letter by Town Planner Pro; the letter itself is the record. Contains public sector information licensed under the Open Government Licence v3.0. Research, not advice.

In the app this decision sits on the map beside every other appeal around it, with the full reasoning summary, the letter held on file, and the case law it applies.