It was always on the cards but we were hoping against hope
that it wouldn’t happen. Unfortunately, our fears were confirmed today when it
became evident that the neighbours to the north are building a two storey
house. Indeed, a quick look at the Porter Davis site indicates that they are
building the Granada 23 or 24 This will obviously impact on the amount of sun
we receive. However, my rough calculations below indicate that the impact won’t
be that bad. Also the Grenada only has a total length of 16M so the family
room, outdoor living and rear garden won’t be shielded from the sun at all.
The southern side of the neighbour’s house will have an
approximate height of 5m. This wall appears to be approx. 3.5M from our
boundary. The northern wall of our property is approximately 3M from this
boundary. The horizontal distance between our northern wall and the neighbour’s
southern wall is therefore 6.5M. For the sun to reach the base of our northern
wall it must be at an angle A where : sine A = 5/8.2 = 0.61. So A = 37 degrees.
(8.2M is the hypotenuse of the triangle with sides of 5M and 6.5M.) The
following site advises that for Melbourne the maximum daily angle of the sun varies
from 28 degrees in winter to 76 degrees in summer. http://solarelectricityhandbook.com/solar-angle-calculator.html
Assuming an even variation in the angle of the sun across
the year then it will not reach the base of our northern wall for approximately
9 weeks in mid-Winter. I think we can live with that.
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