Six Industry Training Association building apprentices took part in the challenge and the winner, Issac Graham, will compete at the national competition in Christchurch later this year.
NZCB Otago president Sacha Gray said the competition could be daunting for the apprentices but this year they were of a very high standard.
"I love it. It's such a cool thing to be part of, seeing these young guys and the passion they have for building, it's tremendous."
Competitors were judged on the finish, presentation and accuracy of their build as well as how well they had prepared, Mr Gray said.
"We're also looking overall, so we're looking at how they look after their sites, if they're keeping them clean, and also how much preparation they have done in the last week since they received the plans."
All of the park benches will be donated to charity.
