Public submissions are being sought on the proposal.
Following the public consultation process Heritage New Zealand recommends places for inclusion to the Associate Minister for Arts, Culture and Heritage, Grant Robertson, to make the final decision.
"The aim of National Historic Landmarks is to protect those heritage places most important to New Zealanders through long-term risk planning and management, including from natural disaster," O'Brien said.
"It's certainly hard to imagine New Zealand without the Waitangi Treaty Grounds. It's an entrenched part of our history, culture and heritage, and without it we would lose something very special. This programme identifies those places that we have such a strong association with or connection to."
Heritage New Zealand is working in partnership with the Ministry for Culture and Heritage and other stakeholders to deliver and promote the programme.
Submissions on the Waitangi Treaty Grounds proposal close on February 12. For more information please visit www.heritage.org.nz