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Old December 27th 09, 04:16 PM posted to uk.d-i-y
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Default 45 degree rule for rear extension - planning

I am currently reading the Haynes Home Extension Manual which is
surprisingly readable and covers much of what I have been struggling to
research from various other books.

Howeve in the 'Planning & Building Regs' chapter it talks about 'right to
light' and the 45 degree rule - a line at 45 degrees to the corner of your
extension should not cover a neighbour's window.

Now we live in a semi, and all have a rear 'outcrop' which originally held
an outside toilet and coal shed. This complies with the 45 degree rule. In
many houses (ours included) this has been converted into a kitchen extension
by knocking out part of the back wall of the house.

Several of the semis on our side of the street (where we can see the back
gardens) have built all the way across the back of the house; extending this
'outcrop' sideways. This seems to conflict with the 45 degree rule as when
you build up to the boundary you must cast a shadow across the rear of your
neighbour's house.

So:

(1) Is this 45 degree rule recent? I can think of loads of extensions where
this has not been followed.
(2) Does it perhaps only apply to two storey extensions?
(3) Is there another rule which 'trumps' this such as one allowing full
width extension for a certain distance behind the house?

Oh, and is there another forum I should consult such as
'uk.rec.legal.moderated'?

TIA

Dave R


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Old December 29th 09, 11:49 AM posted to uk.d-i-y
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Default 45 degree rule for rear extension - planning


"David WE Roberts" wrote in message
...
I am currently reading the Haynes Home Extension Manual which is
surprisingly readable and covers much of what I have been struggling to
research from various other books.

Howeve in the 'Planning & Building Regs' chapter it talks about 'right to
light' and the 45 degree rule - a line at 45 degrees to the corner of your
extension should not cover a neighbour's window.

Now we live in a semi, and all have a rear 'outcrop' which originally held
an outside toilet and coal shed. This complies with the 45 degree rule. In
many houses (ours included) this has been converted into a kitchen
extension by knocking out part of the back wall of the house.

Several of the semis on our side of the street (where we can see the back
gardens) have built all the way across the back of the house; extending
this 'outcrop' sideways. This seems to conflict with the 45 degree rule as
when you build up to the boundary you must cast a shadow across the rear
of your neighbour's house.

So:

(1) Is this 45 degree rule recent? I can think of loads of extensions
where this has not been followed.
(2) Does it perhaps only apply to two storey extensions?
(3) Is there another rule which 'trumps' this such as one allowing full
width extension for a certain distance behind the house?

Oh, and is there another forum I should consult such as
'uk.rec.legal.moderated'?



I heard about a 45 degree rule recently when my son-in-law was planning an
extension. Curiously this applied not horizontally but vertically. They
were told that, in the case of a side extension, it should be possible to
run a 45 degree line up from the window cill of a neighbours house without
impinging on the new extension. I can think of numerous places where I
have seen extensions that do not follow that rule as well.
--
Tinkerer




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