Policy information sourced from the Hounslow Local Plan Part 1

SC7 - RESIDENTIAL EXTENSIONS AND ALTERATIONS

Our approach

We will support the extension and improvement of residential properties provided all extensions and alterations (including outbuildings, basements, and the construction of paving and driveways) maintain the character of the area, and do not result in harm to the amenity of neighbouring residents, existing and future occupants, and the built and natural environment.

We will achieve this by

  • Requiring that all alterations and additions do not harm the existing character and appearance of the building and its context by ensuring development has regard to relevant design guidance and standards set out in Supplementary Planning Documents;
  • Ensuring development responds to and reflects the design recommendations in the Urban Character and Context Study and Conservation Area Appraisals;
  • Preparing guidance for basement extensions in the form of a Supplementary Planning Document; and
  • Using planning conditions to prevent the use of outbuildings or extensions as selfcontained dwellings.

We will expect development proposals to

  • Complement the original building, harmonise with adjoining properties and maintain the character of the general street scene and the character and amenity of private spaces (including rear gardens);
  • Minimise harm to neighbouring residents (such as avoiding an unacceptable loss of daylight/sunlight, outlook or by creating an unacceptable sense of enclosure) and future occupants through high quality design;
  • In the case of an extension or outbuilding development, have regard to the quality, character, materials and scale of the principal building, be subordinate to the existing building, and not over develop the site in terms of mass and density;
  • Respect the surrounding established context including the quality and size of gardens.
  • Have regard to further design guidance as set out in Supplementary Planning Documents, and design recommendations in the Urban Context and Character Study and Conservation Area Appraisals; and
  • Have regard to the design standards set out in the Local Plan and Supplementary Planning Documents where the development of outbuildings, extensions and alterations are carried out under householder permitted development rights.

For more information please see the Hounslow Local Plan Part 1