The Building Research Establishment (BRE) guidelines “Site Layout Planning for Daylight and Sunlight: A Guide to Good Practice” (1991) provide guidance on avoiding unacceptable impacts and sets out targets for levels of daylight and sunlight within existing and proposed development.

Suitable daylight for habitable rooms is achieved when a 25 degree vertical angle taken from the centre of the lowest windows is kept unobstructed.

Sun and shadow calculations for this location:

1 January
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1 October

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Shading & sunlight

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