Policy information sourced from the Kensington and Chelsea Local Plan

CL9 Existing Buildings – Extensions and Modifications

The Council will require extensions and modifications to existing buildings to be subordinate to the original building, to allow the form of the original building to be clearly understood, and to reinforce the character and integrity of the original building, or group of buildings.

To deliver this the Council will resist proposals for extensions if:

  • the extension would extend rearward beyond the existing general rear building line of any neighbouring extensions;
  • the extension would rise above the general height of neighbouring and nearby extensions, or rise to or above the original main eaves or parapet;
  • the extension would spoil or disrupt the even rhythm of rear additions;
  • the detailed design of the addition, including the location or proportions or dimensions of fenestration or the external materials and finishes, would not be in character with the existing building;
  • the extension would breach the established front building line;
  • an important or historic gap or view would be blocked or diminished;
  • the architectural symmetry of a building, terrace or group of buildings would be impaired;
  • the original architectural features on a formal flank elevation would be obscured;
  • access to the rear of the property or of those adjoining would be lost or reduced;
  • a conservatory is proposed to be located at roof level, significantly above garden level or on a corner site.

For more information please see the Kensington and Chelsea Local Plan