"If you can only imagine what it's like to not have a home and then to have a home? You're talking about people who have a sense of belonging, a sense of safety and a sense of hope for the future," Auckland City Mission chief executive Helen Robinson says.
Although HomeGround opened in February, Covid-19 restrictions delayed the official opening until now.
In addition to the apartments, the facility has a shared rooftop garden and residents' lounge, a health centre, a pharmacy and addiction withdrawal services.
The facility also has a community dining room which operates every day of the year, providing free meals to those in need.
Robinson expressed thanks to the Government for the funding of the facility which she says cost about $110 million. She concluded her remarks by encouraging continued support for the kaupapa.
"Listen to the needs of those who are suffering the most, because that is the experience and the authenticity of which I stand here as the missioner. It's the coalition of thousands of people and stories of people who are suffering deeply."