Certificate of Lawful Development Appeal Decisions by category of development.

The Town and Country Planning (General Permitted Development) Order 1995
Part 1 (as amended on 1 October 2008) 

Obscure glazed and non opening windows

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·       Glazing to provide privacy is normally rated on a scale of 1-5, with 5 providing the most privacy. To be permitted development, side windows should be obscure glazed to minimum of level 3.
[Source: “DCLG - Permitted development for householders - Technical guidance” (August 2010)].  

·       Obscure glazing does not include one-way glass.
[Source: “DCLG - Permitted development for householders - Technical guidance” (August 2010)]. 

·       Where a window is on a staircase or landing (i.e. not in a room) the 1.7m measurement should be made from the stair or point on a landing immediately below the centre of the window, upwards to the opening part of the window.
[Source: “DCLG - Permitted development for householders - Technical guidance” (August 2010)]. 

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Permitted Development information