Additional car-parking space will be created near the Cromwell Mall, off Waenga Dr, to encourage more use of Anderson Park and its gardens.
The Cromwell Community Board had previously allocated $60,000 for the project, and this week decided on a final location and site plan.
About 34 car parks will be created between the park's playground and a nearby fountain, by extending and reconfiguring the existing parking space.
Access to the car park is off Waenga Dr, and Cromwell's old sun dial as well as the rose garden are nearby.
Board members discussed whether instead to create car parks on a grassy section between Waenga Dr and the Cromwell Swim Centre, but decided to leave the space as it was an attractive part of town.
Extending the existing car park would likely encourage more visitors to the rose garden, fountain, sun dial, and park, board chairman Neil Gillespie said.
Board member Terry Emmitt was concerned the rose garden's "ambience" would be lost if additional car parks were developed, but conceded it was not a well-used area at present.
Central Otago District Council roading manager Julie Muir said work should start within a month.
Costs could be reduced by about $8000 if existing metal could be reused, she said.