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You may also have restrictions due to a previous planning permission. You may need to apply for planning permission for some of these works because your local authority has made an Article 4 Direction withdrawing permitted development rights. Refer to that page for more information.Īdding windows and doors is part of Class A of Part 1 – enlargement, improvement or other alteration of a dwelling house. – skylights, roof lights and velux windows are all part of Class C of Part 1. Therefore a top part can be opening if at least 1.7m above the floor or stairs measured from the middle of the widow. – they are in the side elevation roof slope they must be obscure-glazed and either non-opening or more than 1.7 metres above the floor level. – they are no higher than the highest part of the roof – they do not protrude more than 150mm beyond the plane of the roof slope New roof lights or skylights, providing:.Installation of internal secondary glazing.they should be to a minimum level of 3 for obscure windows If new windows are in an upper-floor side elevation they must be obscure-glazed and either non-opening or more than 1.7 metres above the floor level.Insertion of new windows and doors that are of similar appearance to those used in the construction of the house.Repairs, maintenance and minor improvements, such as repainting window and door frames.You do not usually need planning permission for windows and doors in your house for: Windows and doors – can I add them without planning permission? Class AB – Flats on terraced commercial.Class AA – Flats on detached commercial.Class ZA – Demolition & construction of new flats.Class O – Flue for a micro combined heat - com.Class L – Ground source heat pumps - com.Class K – Stand-alone solar equip - com.Class I – Stand-alone wind turbine - resi.

Class F – Flue for a micro combined heat on resi.Class D – Water source heat pumps on resi.Class C – Ground source heat pumps on resi.Paragraph D – Interpretation of Classes A to C.Class B – Development on land under 5 ha.