The use of your helicopter for 28 days to land at your private dwelling is a legitimate reason to object on health and safety grounds at least.It is,in principle,no different to someone building a wall which blocks the view when you exit your drive.
Also the fact that your use is not officially safeguarded under CAA regulations should not prevent a legitimate objection.
However ,because planning officers (and members) rarely have intimate knowledge of helicopters,flight paths etc.it would be a good idea to ask the CAA for technical advice and to detail FATO requirements ,prevailing winds and other factors such as existing obstructions ,to demonstrate how the wind turbine would be a danger.
If necessary you should ask the Council to employ their own specialist consultant to report on the issue.If you can get your local Councillor on side that will help....you could also offer to demonstrate the flight path to members and officers to underline the point.Unless they want to be seen as unreasonable they should go along with that...but don't offer them a passenger seat.That might be seen as a bribe!
Finally ,if your helipad was not built but a natural feature ,then your use is ancillary to the dwelling and you dont need planning permission...after all it is just a mode of transport like your car .However if the pad involved engineering operations it would need planning permission.
In that event if you have been using your helipad for more than 28 days ,for more than 10 years without objection,and can prove that by logbook entries and/or dates you could apply for a Certifiacte of Lawful Use.This is decided on the balance of probabilities so good evidence is vital .
Good luck.
Last edited by heli1; 20th Apr 2011 at 08:17.