Actually, both the measurements can fall into the 3m rules depending where I measure from......
The area is bang on 3m² if I start the measurement in line with the corners of the house with are built out like a couple of brick pillars, and the roof is 3m tall if I measure from the damp course.
No worries here, I suggest.
If the council got wind of this (which they will only do if a neighbour complains), the worst they will do is send you a letter threatening enforcement.
But it will only be a threat and they will not follow through; official government guidance states that enforcement is not appropriate for
'a minor or technical breach where no harm has occurred'.
I would say your breaches are pretty minor so don't loose sleep.
PS just noticed fmt, he beat me to it, but +1 to what he says.
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