The State Government has announced a multi-million-dollar pedestrian bridge linking Perth Children's Hospital to Kings Park is finally going ahead.

Key points: The footbridge will allow the hospital to offer some therapies in Kings Park

The footbridge will allow the hospital to offer some therapies in Kings Park The bridge was originally expected to open at the same time as the hospital

The bridge was originally expected to open at the same time as the hospital Construction is scheduled to be finished by the end of next year

The rainbow-coloured footbridge, called the Kids Bridge, will enable sick children, families and hospital staff to walk over Winthrop Avenue from the Queen Elizabeth II (QEII) Medical Centre site to visit the park.

Funded by the Perth Children's Hospital Foundation, the $6.3 million bridge will be built over the road to connect an outdoor area between the hospital and a multi-storey carpark to Kings Park bushland.

Construction of the pedestrian bridge is expected to start later this year. ( Supplied: WA Government )

WA Health Minister Roger Cook said the bridge would provide an opportunity to deliver a range of therapies for patients at Perth Children's Hospital (PCH) in a natural environment.

"We know there is strong evidence in the power of healing that trees and nature have, and this bridge will allow this to be harnessed," he said.

"The opportunity to have our young patients and their families be able to access this urban sanctuary during a challenging time is a wonderful bonus and a terrific testament to the values of our system and the Perth community."

Bridge idea more than a decade old

The Kids Bridge was first suggested more than 10 years ago and was originally expected to open at the same time as the new hospital.

The bridge will let patients, families and staff walk over Winthrop Avenue to visit Kings Park. ( Supplied: WA Government )

PCH Foundation chairman Ian Campbell said the idea came from a group of children on the then-Children's Advisory Committee.

"They wanted easy access to Kings Park via a bridge to give them much-needed respite and distraction from the rigors of their medical treatment and some reprieve from their clinical environment," he said.

Staff and visitors will also benefit from the bridge through increased access to existing cycling and pedestrian paths for commuting to work, along with the ability to use the park for fitness and work break activities.

Space to play or pause, M to mute, left and right arrows to seek, up and down arrows for volume. Watch Duration: 1 minute 14 seconds 1 m 14 s The saga of Perth Children's Hospital

Construction on the project is expected to start later this year, after final approvals from the Kings Park Board.

Main Roads will manage the design, construction and maintenance of the bridge, working collaboratively with the PCH Foundation, Child and Adolescent Health Service, Botanic Gardens and Park Authority, QEII Medical Trust and the City of Perth.

'An iconic new structure'

WA Transport Minister Rita Saffioti said she was eager to finish the bridge as soon as possible.

The bridge will allow the hospital to deliver a range of therapies in a natural environment. ( Supplied: WA Government )

"We are very hopeful that we will get this project underway very soon and have it completed for West Australian families and children to enjoy," she said.

"The design of the bridge is unique and colourful and when complete, will become an iconic new structure across Winthrop Avenue."

Mr Cook called the bridge an outstanding addition to PCH after the hospital endured "earlier troubles" before its opening.

"At last, we are finally seeing this project come to fruition," he said.

Construction of the Kids Bridge is scheduled to be finished by the end of 2021.