There was an article in the December 09/January 10 edition of Vertical magazine about a guy who set up his own private LZ at his home in Utah. In it he goes into his reasons for not getting it designated as a "helipad";
FAA regulations and requirements state that one can only fly a helicopter from a residentially operated landing zone three days per week, and no more than 10 times in one day. Yes, technically that means you could actually fly from an LZ up to 30 times a week, but then there is the reality. And, if Lindsey were to apply to register his landing zone as a helipad, the number of takeoffs and landings would have to exceed 10 per day — so a landing zone it is.
He then goes further into the local crap he has to wade through.
Here is a link to the article.