Simon Currant is hoping to attract international investment to complete the $8 million accommodation development of the former pumphouse at Lake St Clair.

He says persistent opposition to tourism developments seeking to capitalise on Tasmania's wilderness was harming the industry and putting off potential investors.

``The Greens continually say they support tourism but their actions are the opposite,'' Mr Currant said.

Yesterday, Greens tourism spokesman Tim Morris stood by his party's approach to development in national parks.

Mr Morris said the state's national parks and reserve system belonged to all Tasmanians and should not be treated as a ``cash cow'' by a few large private operators.

``Nobody questions the need to encourage further appropriate tourism investment into Tasmania and the best way to do so is to protect the natural values that bring people here in the first place,'' Mr Morris said.

However, Mr Currant accused the Greens of hypocrisy for promoting tourism as an alternative to logging and mining, but at the same time opposing major tourism developments.

The Pumphouse project is one of 80 investment-ready tourism proposals listed in a new guide, published this week to attract investors.

Federal Tourism Minister Martin Ferguson said the chosen developments would also be pitched to Chinese investors as part of Austrade's work.

The guide describes Pumphouse Lake St Clair as ``the pre-eminent wilderness lodge in Australia, delivering exceptional natural experiences through its unique world heritage area location, privacy and engagement with its superb natural surrounds''.

Mr Currant first announced his plans in 2005 and won final approval early this year.

He said work has begun on the restoration of the buildings and he hopes to host the first guests by the end of the year.