The Atlantis Child Care Centre is attached to an indoor play centre that opened earlier this year on the corner of Key Largo Drive and Ocean Keys Boulevard.
Owner Bob Hindle said they were excited to open the second part of the development, which will have 92 places for children.
"The solar passive design of the building catches the warmth from the morning sun, allowing natural light and heating into the rooms; in the afternoon the building throws natural shade over the play areas," he said.
Mr Hindle said they would hold an open day on June 6 so people could see the child care facility as well as the play centre and the outside of school house centre, which has 120 places.
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READ NOWMoore MHR Ian Goodenough and Senator Michaelia Cash visited the facility shortly before opening to discuss a child care subsidy proposed through the Federal budget.
"These changes take effect from July 1, 2017 and aim to simplify the government assistance for child care," Mr Hindle said. "It is hoped that the subsidy will help to further support working families."
The development would also include the Key Largo Professional Centre, due to open next month with leases in place for medical, financial, legal and other services still available.