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RESOURCES

Fact Sheet 2: BRE ‘Site Layout Planning for Daylight and Sunlight’

This fact sheet describes the tests used by Local Authorities when deciding over planning applications.

The following tests are covered:

Daylight to Windows

  • Vertical Sky Component (VSC)
  • Daylight Distribution / No Sky Line
  • Average Daylight Factor (ADF)
  • Room Depth

Sunlight to Windows

  • Annual Probable Sunlight Hours (APSH)

Overshadowing

  • Overshadowing to Gardens and Open Spaces

The tests described in this fact sheet originate from the Building Research Establishment (BRE) document ‘Site Layout Planning for Daylight and Sunlight: A guide to good practice’.

sheet 2

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