The hotel had been in the works for close to five years, after the Chow brothers bought the well-known historical glass building in the Rotorua CBD in 2015.
The 130-room hotel hosts nine floors with a range of different sized rooms including top floor president suites.
The centre point of today's opening was a karakia blessing before the first guests arrived this afternoon.
The ceremony was opened by Reverand Tom Poata with a karakia before Ngāti Whakaue and Te Arawa representatives led two moving waiata that echoed throughout the foyer.
Waiata echoed throughout the foyer of the new hotel at the official guest opening. Photo / Stephen Parker
Mayor Steve Chadwick said the opening was "incredibly exciting" and every aspect of the building had been designed to reflect the city's identity.
Chadwick had personally met many of the staff, who she said were already prepared to say "kia ora" to the arriving guests.
She said the hotel was an "investment in our city".
The old Zen building back in 2016. Photo / File
Ngāti Whakaue leader Monty Morrison said today marked a "wonderful" day for Rotorua.
He said it was humbling to have so many Te Arawa and Ngāti Whakaue representatives at the opening as the building had "great historical significance to the iwi".
The land for the hotel had originally been gifted from Whakaue.
