The $150,000 kitchen renovation was officially opened by the state's Minister for Environment and Heritage, Robyn Parker and Port Stephens MP Craig Baumann last Wednesday.

Mr Baumann and Ms Parker had morning tea at Tahlee and a tour around the site, which was established in 1826.

"The kitchen reopening was a wonderful opportunity for the minister to come and look at this hidden gem in my electorate," Mr Baumann said.

"The history surrounding Tahlee is incredible and coupled with the naturally beautiful landscape makes it a must see for both locals and visitors."

Tahlee Ministries general director John Anderson said about 6000 people visit the bible college each year.

Mr Anderson said the kitchen renovations, which included lowering the floor to provide direct access to the dining room and installing ovens and dishwashers, would allow the college to be much more efficient in hosting visitors to the historic site.

"We were looking at providing a facility to be able to better host school groups and community groups," Mr Anderson said.

The home built on the heritage-listed site includes a garden, a ballroom, tennis courts and a billiard room.

In 1959 the property was purchased and the Tahlee Bible College started the same year.

The ministry run heritage tours at the site.

Renovations to the heritage building were approved by the Great Lakes Council and the state's Office of Environment and Heritage.