45degree rule clarification

[nickjb]

I'm hoping to extend 4m off the back. Not PD as we are end terrace. I'm hoping it'll be alright having read the local guidelines but its quite tight on the 45 degree rule. It'll only be a single story so do we only measure 45 degrees from the neighbour's downstairs windows? On one side they have a conservatory do we measure from the main house or the back of the conservatory and if so where from (the middle, the nearest panel?)? On each side there is an extra coalshed/lean-to attached to the house that intercepts the 45 degree line. Does this have any impact? The lean-to has the kitchen door in it so it is part of the house

Very rough sketch. Windows in dark grey, back door in red.

Untitled

• nickjb
• 10 Nov 2010
• 1

 

[^woody^]

The coal sheds mean that the 45 degree rule can't be applied

 

[DevilDamo]

If the LPA adopt such rule/guidance, then the 45 degree rule only comes into play when proposing a two-storey extension. So you could have a larger ground floor extension and the first floor set back, e.g.

My LPA do not use the 45 degree rule but just look at the overall proposal and the possible affect on neighbouring properties. However, the LPA who we use at work a lot do use the rule and nothing less will be accepted.