The ACT will lobby the National Capital Authority to reclassify Molonglo as Canberra's sixth town centre.
The fast-growing area's commercial centre was originally planned for surrounding suburbs of 55,000 residents but more than 70,000 people are expected to live in the district by 2050.
Planning Minister Chris Steel said the ACT was working on a case to the National Capital Authority to amend the national capital plan to include Molonglo as a town centre.