Exceptions and Modifying Factors to the Angles Test

The 'angles test' is not a rigid standard which must be met in every case. Rather, it is a tool which can be used to gauge the acceptability of proposals in terms of the overshadowing/loss of light impact upon neighbouring properties. However, other relevant factors will also be considered, such as: i. The existing form and type of extension prevalent in the area – where the majority of dwellings in a terrace have already been extended in a similar way to the application proposal this matter will be balanced against any adverse impact on neighbouring properties. ii. The proposed design of the extension – where a proposed extension incorporates significant glazing, the impact on neighbouring properties may be acceptable in circumstances where alternatives might result in unacceptable overshadowing. iii. The particular characteristics of the site and its context – where daylight is already impeded to an adjacent dwelling by an existing building or boundary wall and the proposal would not significantly exacerbate the existing situation. iv. The orientation and position of a neighbouring window, the room it serves and whether the window affected is the primary source of light for that room –account will be taken as to whether a room affected by a proposed extension benefits from an alternative natural source of light. v. The potential size and form of an extension allowable under permitted development – where a proposal would not have an impact significantly greater than that of an extension allowable under permitted development rights. vi. Provision of an extension or alterations to meet the needs of a person with a disability – a modest single storey extension required to meet the particular needs of the person in question will be a material consideration to be balanced against any adverse impacts on the neighbouring property. This may result in requirements relating to loss of daylight and overshadowing being relaxed. vii. The proposed design is for 'joint extensions' to adjoining properties – 'joint extensions' to adjoining properties may be accepted even if the individual extension would not comply with the 'angles test' provided that the extensions are of the same depth and are to be constructed at the same time.