The Garden Bridge Trust has submitted planning applications for its proposed £175M Thames crossing in central London.
The charity handed over official documents to Lambeth and Westminster councils and hopes to receive decisions on the ambitious scheme by early October.
London 2012 opening ceremony cauldron designer Thomas Heatherwick masterminded the bridge, which would link the capital’s South Bank to Temple station. Arup worked as a consultant on the designs.
The Trust said it would begin building the crossing in spring 2015 if it received planning permission and raised enough money.
It currently has a little over £90M of the £175M needed, and is appealing for more donations.
The bridge, which would feature trees and walkways, could be open to the public by mid 2018.
London Mayor Boris Johnson spoke to NCE about the project last summer.