When you talk about an antenna, it is currently a UHF (Ultra High Frequency) aerial to collect terrestrial TV signal.
You need a UHF aerial/antenna for Freeview/Digital TV/New Zealand’s Free to Air Channels (or if this signal is not available, a satellite dish) to view these.
With a UHF aerial/antenna, you can view a selection of programmes in HD, Dolby Digital sound, and get exclusive local channels. All subscription free.
Has your New House been built? You will be needing an aerial mounted and connected to your internal cabling.