Advocate Fran Corner was joined by residents Frances and Barry Williams in raising concerns for the safety of kids who frequent the vandalised building and calling for urgent action.

"It provides a place for children to congregate and an excuse for them to get involved in things like drugs and alcohol. But these are not necessarily bad kids," said Ms Corner.

For the Williamses, who have lived in Tanilba Bay for 10 years, the site has become a waste of space and needs urgent attention.

"There are broken tree branches and rubbish strewn around ... it is a terrible look and should be investigated."

The property, located at 49 President Wilson Walk, is for sale.

Plans unveiled last year to transform the derelict building site into a 100-unit, $23 million seniors living development have been scraped due to a lack of finance.

According to selling agent Raine & Horne Commercial, the vendor had developed a concept plan for the development of a residential aged care facility through adaptive re-use of the existing building.

"The plan envisages conversion of the existing building into a residential aged care facility and also provides the option for development of ancillary and complimentary uses such as a medical centre and independent living units, etc," the real estate stated.

"The vendor has sought and obtained initial in principle approval from the Port Stephens Council for the development of a residential aged care facility on the subject property which was looked at favourably by council.

"In addition, the B2 zoning offers the ability to develop a mix of commercial, retail and multi dwelling residential developments including boarding houses, commercial premises, community facilities, entertainment facilities, medical centres and tourist and visitor accommodation (STCA)."

Expressions of interest close on Thursday, June 18.