PPS 7 (Addendum): Residential Extensions and Alterations
Annex A: Residential Amenity: Dominance
A31 Dominance is the extent to which a new development adversely impinges on the immediate aspect or outlook from an adjoining property. Neighbouring occupiers should not be adversely affected by a sense of being ‘hemmed in’ by an extension. This can often result from the construction of a large blank wall. Dominance can be increased when the neighbouring property is at a lower ground level to the development site. Loss of light is usually a consequence of dominance. Two storey rear extensions to semi-detached and terraced dwellings are usually very prominent when viewed from adjoining dwellings and can dominate outward views from adjoining ground floor windows, appearing excessively large and overbearing. It is appropriate, however, to take account of the prevailing local environment.