Enlargement, Improvement or other Alteration of a Dwelling House

In order for a development to be PD the development must comply with the following:

• Development must not take up more than 50% of the total area of the curtilage (excluding ground area of existing dwelling house) FOR ANY PROPERTY.
• No extension forward of the principal elevation or side elevation fronting a highway.
• No extension to be higher than the highest part of the roof.
• Maximum depth of a single-storey rear extension of three metres for an attached house and four metres for a detached house.
• Maximum height of a single-storey rear extension of four metres.
• Maximum depth of a rear extension of more than one storey of three metres including ground floor, and be within 7 metres of any boundary of the curtilage opposite the rear wall.
• Maximum eaves height of an extension of three metres if extension would be located within two metres of the boundary.
• Maximum eaves and ridge height of extension no higher than existing house.
• Side extensions to be single storey with maximum height of four metres and width no more than half that of the original house.
• Two-storey extensions no closer than seven metres to rear boundary.
•  No verandas, balconies or raised platforms.

If a development is considered to be PD under class A the following conditions must be applied:

• Materials to be similar in appearance to the existing house.
• Upper-floor, side-facing windows to be obscure-glazed; any opening to be 1.7m above the floor.
• On designated land* no permitted development for rear extensions of more than one storey.
• On designated* land no cladding of the exterior.
• On designated* land no side extensions.