Posted: 09/02/2014 at 20:01
I would get professionals in to take the height down to about 8 feet, and to shape the sides properly.
You might then be able to maintain it yourself with the proper equipment - you'll need a safe ladder system and powered hedge trimmer and you'll also need to study some information about how to use them safely - or you could get professionals in to trim and tidy it once a year.
Don't let anyone cut it back hard at the sides - if you cut into the older wood it is brown and will not grow new green leaves again - ever! and you will be left with a very ugly hedge.
I am sure that your new neighbours will be very happy with you if you reduce the height of that hedge - it looks like Cupressus Leylandii which can grow very tall indeed and cast deep shade over neighbouring gardens - the tallest documented at the moment is over 100 feet tall!