As with any government agency, in order to build or maintain a heliport or helipad, certain administrative requirements must be filed with appropriate agencies. Paperwork and approval is required for environmental, population and zoning concerns. In addition, any changes or additions must be approved by regulatory agencies.
In all, federal aviation regulations on helicopter landing zones are mandated and enforced in an effort to keep both helicopters and the people on the ground safe. The regulations have successfully kept helicopter crashes to a minimum over the years.