Stephenson Avenue Extension Project

The City is working in partnership with Main Roads to deliver the Stephenson Avenue Extension.

Works are underway to prepare for construction:

  • Installation of fencing and establishment of site office
  • Earthworks and compaction to the east of Mitchell Freeway
  • Vegetation clearing to the road reserve east of Mitchell Freeway.

Noise, dust, and vibration may be noticeable to those living or working nearby. These activities are required to prepare for construction of the new bridges, freeway on and off-ramps and the shared path. A range of control measures are being put in place to minimise dust and noise disturbance.

How is the extension being funded?

The Western Australian State Government is contributing $129 million and the Federal Government $129 million.

Will there be any disruption to my business during construction?

The work that will affect existing intersections will be done at night time or weekends to minimise disruption to business trade.

While some traffic lanes will need to be closed, traffic will be managed with detours and there will be controllers on site to help pedestrians cross roads during construction. There will need to be some night work at the intersection of Stephenson Avenue and Scarborough Beach Road to lay asphalt.

There should be no restrictions on parking, or access to business premises. Any dust caused will be carefully managed within the project site.

Construction Trucks can enter and exit the construction site via Sarich Court, Scarborough Beach Road, and the new Oswald/Flax Street links with Ellen Stirling Boulevard, and should not have any impact on business.

Will my building be damaged by the construction work?

A ‘dilapidation survey’ was carried out in February 2020 prior to commencement of any works by a consultant ‘Specialist Testing and Technical Services Pty Ltd’ who has recorded the condition of properties which could be impacted during construction.

The dilapidation survey was issued to Densford Civil for their acceptance. A second dilapidation survey will be carried out upon the completion of the works to determine any impact on properties during the course of construction.

What happens if works do damage buildings?

Damage incurred as part of the extension will be covered by the third party insurance policy of the main contractor.

When will the dilapidation survey happen?

A dilapidation survey was carried out in February 2020. 

How will the City offset the trees and vegetation removed as part of the Stephenson Avenue extension project?

The City is committed to offset any tree loss on a 5:1 ratio by planting new trees in the close vicinity of the project. This means, for every one tree removed, five trees will be planted in its place. The City has already planted over 300 trees in and around the Stirling Civic Gardens, with additional trees to be planted along Stephenson Avenue as part of the Phase 1 construction works.

What is the project background?

The Phase Two contract (from Flax Street - new road - to Cedric Street and the Stirling Bus Interchange Upgrade) has been awarded to Acciona, Clough and WSP under an alliance contract (read the media release). Works are now underway.

For the latest update from the State Government on this project, visit Main Roads WA’s website.

Phase 1 of the project has now been completed, extending Stephenson Avenue north of Oswald Street to Flax Street and creating a second local traffic connection between Stephenson Avenue, Flax Street and Ellen Stirling Boulevard.

Delivered over two phases, the extension project includes the construction of a new freeway interchange and the Stephenson Avenue road network that runs through the middle of 55 hectares of land-locked vacant land.

As well as opening up of large areas of land for development, the project will reduce traffic along Scarborough Beach Road. Reducing traffic along Scarborough Beach Road will free up road capacity for the future construction of dedicated bus lanes and ultimately a mid-tier transport system.

The project is funded by a $129 million commitment by the Western Australian State Government and a $129 million commitment by the Federal Government and is being delivered in conjunction with Main Roads WA.

  • Phase 1 Stephenson Ave, Scarborough Beach Road - Flax Street (delivered by the City)
  • Phase 2 Freeway interchange and Flax Street - Cedric Street and upgrade to Stirling Bus Interchange from an 18 stand to 30 stand facility delivered by Main Roads WA.

The project is a key component of the Stirling City Centre project which will unlock private investment in the area, relieve traffic congestion, increase employment opportunities and support future mid-tier transport system.

View the MRWA Phasing Plan here.


Construction complete

Early 2024

Construction start

March 2022

Contract award

October 2021


2022 - 2021

Scarborough Beach Road - Flax Street

Feb 2022

Project completion

Late 2021

Commence construction Phase 1

October / November 2020

Vegetation clearing

September 2020

Council endorsement of preferred contractor for forward words and contract Phase 1

June 2020

Tender advertisement main Contract Phase 1

February 2020

Forward works quotation

February 2020

Project development phase

January 2020
See more

For more information, contact Facilities, Projects and Assets on (08) 9205 8555 or use the customer enquiry form

Social Media Share this projectLinks below open in a new window