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Planning Considerations



Article 185 [ added on 14-09-2009, updated on 12-08-2010 ]

Over shading

If your proposed extension is on the south side of a neighbouring building, then the Planning Officer may judge your proposal to be unsatisfactory because of excessive over shading caused by it. This is more likely to be a problem with two-storey extensions than a single-storey one.

Overlooking

If your proposal includes windows which overlook a neighbouring property, the Planning Officer may consider that in doing so they encroach upon the privacy of the people living there. It is not usually sufficient to suggest glazing the offending window with obscure-glass, unless it is a bathroom and would normally be glazed.

Apart from removing the window and repositioning it on another elevation which doesn’t overlook, the only acceptable solution is to design it as a high-level window with the bottom cill height at least 1.78 metres above the finished floor level; this is above an average person’s eye level.

Design

The visual appearance of the extension is a prime consideration and is often the cause of much disagreement. What is good design and what is bad design can be a matter opinion.

Blend the new extension with the original house with materials that match and a design that is considerate, if not similar.

Off-Street Car Parking

An extension, perhaps sited in the back garden, can affect your car-parking space if the extension contains extra bedrooms.

Some planning guidelines cross-reference the number of off-street parking spaces required for a house with the number of bedrooms in the house. A two-bed roomed house may have needed two car spaces (one on the drive and one in the garage) when built, but a two-storey extension on the back of it proposes two extra bedrooms making the total four. Your local planning guidelines may require a four-bed roomed property to have at least three car spaces. These spaces have to be a given size and agreed with the Highways Officer, who will be consulted on your planning application.

If you intend to build over your driveway, you may have to provide alternative car-parking space on your site.

Highway Visibility

If your extension is near to the road it must not interfere with the existing ‘line of sight’ for motorists using the road, or indeed for yourself as you emerge from your driveway onto the road.

Size


The size of your proposed extension is important and may relate as much to the amount of available room on the site and how much garden will be left, as to the impact on the neighbourhood. If the size is too big then the Planning Officer may consider your proposal to come under the heading of ‘overdevelopment’.

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