It all depends ........ There are loads of odd planning regulations and even 'covenants' on certain houses. I lived on an estate where the developers had a restriction that you couldn't put a TV aerial on the roof - but everybody did. A 12 to 15 ft pole isn't actually going to look that big when mounted on the roof. If in doubt, ask the local authority planning department, but if they say no then you are stuffed. If you don't ask them, you can wait for them to tell you to take it down - which they might never do :-)
However, if you are in a 'council' house, other rules might apply.