It was hoped that construction of the house would start early next year and it would be finished and sold by the middle of next year, Cromwell Rotarian Doreen Evans, who is leading the project, said.
Ms Evans had led a similar project in Invercargill that made $200,000 and she hoped at least a similar amount would be raised for the Cromwell project.
Cromwell tradespeople and businesses were already offering services for the project, and "the more support that comes from the community the more money we can make'', Ms Evans said.
All the profit from the house will be donated to the $3.4million St John rebuild.
The three-bedroom house will be built at Prospectors Park, in Cromwell.
A meeting to launch the project will be held at AWS Legal offices in Cromwell at 5pm on September 17.
