Ross said he had been approved to be released to Christchurch, where he hoped to find building work. He and his team would earn their NCEA Level 3 construction and carpentry qualification through the build.
Ross said it was good to be able to pass on his knowledge to others.
"I've always been patient but it's given me more skills to explain things in a way people will understand," he said.
"It makes it even better knowing it [the house] will go to a family that's a little bit less fortunate."
Habitat is going through the application process to find a family suitable for a three-bedroom house, which was still five to six weeks away. On completion the house will be craned over two prison walls - an extremely technical job, said the prison's employment project manager Ben Whitaker.
The family would help finish the house off on its Corks Rd site and would then move in and begin making affordable, regular repayments to Habitat.
Habitat's Northland executive officer Conrad LaPointe said the changes at Corrections meant the family were now involved mainly in doing the interior and landscaping of their property, rather than the build. They made up their 500 hours through other charitable work for Habitat and other organisations.
"[Building inside prison] adds to the cost, but we still see this as a great value partnership," Mr LaPointe said. "The prisoners are still learning skills."