These new timings follow the withdrawal of one of the partners who formed part of the original consortium which successfully bid to develop the project.
Councillor Liz Fairhurst, Executive Member for Adult Social Care and Health, said: “I am very pleased that we are now in a position to secure the services of a new development partner.
“After some frustration for all concerned, I am confident that we can now move forward positively, working closely with our partners on Havant Borough Council.
“Once completed in early 2021, this development will be a huge asset to the Havant community – we will all be delighted to see the construction of this valuable amenity begin.”
The health and wellbeing campus will comprise an 80-bed nursing home, 51 Extra Care housing apartments for older people, and 48 Supported Living housing apartments for older people with less intensive needs.
The County Council is providing the site along with capital grants to help with the development.