This is a very in-depth subject that requires lots of attention when planning your site and its relation to property lines, easements, roadways and most importantly power distribution lines.  There is no way that we can make definitive recommendations for your specific location, nor do we understand all specific zoning restrictions or permit requirements for areas around the world.  What we do suggest is this… ensure that your support structure is up to the task of handling the antenna you choose.  While a push-up mast may be adequate for smaller and lighter weight VHF/UHF antennas, these are NOT appropriate for larger HF models.  You will need to refer to the manufacturer’s engineering specifications for your specific tower or structure to ensure that the weight, wind load, twisting moment and other factors can be supported with a reasonable margin of safety.  In other words, DO NOT expect to install a MkIV 5-Band atop a freestanding Rohn 25 of any height!  This would be completely unacceptable, and may result in significant property damage, or worse.  Plan accordingly, and as with all projects of this type, Safety First!