South Perth project area

Map of the Collier underground power area

In January 2017, it was announced that funding had been secured for an additional three State Underground Power Projects (SUPP) in the City of South Perth - Manning, Collier and South Perth

The South Perth area is bounded by Douglas Avenue, Canning Highway, Hovia Terrace and Mill Point Road.

Following preliminary and detailed design for the area undertaken in late 2019, project works are due to commence in late 2021 for the installation of new underground cabling, primary equipment and new LED street lights.

What you can expect 

Western Power's project contractor for the area, Diamond Underground Services will issue letters of advice to each property at the various stages of the project as outlined below. Timing and further details of each stage will be updated here as and when the information becomes available. Residents will also receive advice notices from Diamond Underground Services throughout the construction activities.

Stage 1 - Property Services Installation - late 2021

Installation of the new underground service cable from the front boundary of the property to the house. Diamond Underground Services will be accessing properties in the area over the next few weeks.

Residents do not need to be home for this work. Should Diamond Underground Services need access inside a house, or to the rear of your property, or if your meter box is locked, they will contact you to arrange access.

This work is just for cable installation. The cable will remain unconnected at both ends until the power is changed over from the existing overhead wires to the underground service.

Changeover will take place once the underground circuits in the street have been completed and energised. Information about the conversion process will be provided via letter approximately three to five days prior to the changeover.

Western Power and Diamond Underground Services will endeavour to minimise the impact of this work by using underground drilling when on your property.

Diamond Underground Services is responsible for all reinstatement works. Please note that the contractor will not accept responsibility or provide reimbursement for other repairs or re‐instatement carried out by a third party.

Stage 2 - Street Services Installation

Stage 3 - Changeover 

Stage 4 – Removal of poles and wires

Work on this project is expected to take approximately 12-15 months.

Project cost

A survey of property owners was undertaken by Energy Policy WA (formerly known as the Public Utilities Office) in August 2016. The survey provided the opportunity to vote yes or no for SUPP and also gave an indicative cost to each property owner.

Survey results from the South Perth area indicated solid support for underground power and it was subsequently nominated as one of three City of South Perth Round Six projects.

The funding contribution that property owners would be asked to pay based on preliminary estimates at that time was an average of $6,650 for a typical single residential property. The amount would generally be less for units in multi-unit developments. Costs for commercial properties would generally be greater than for a single residential property.

Payment details and the repayment structure will be considered as part of the 2021/22 budget process.

Who to contact

For any project repairs or reinstatements enquiries please contact Diamond Underground Services on 1300 064 710 or email

For other project enquiries please visit the Western Power website or call them on 13 10 87.

Frequently Asked Questions

Why are we getting underground power? When were property owners asked if they want underground power? How were the Round Six projects selected? What are the benefits of underground power? What if I don't want underground power? What if my land is vacant? Why should I have to contribute to the replacement of Western Power infrastructure? When will I get underground power? How will the project be implemented? What will happen to my verge when underground power is installed? Does the cost include the connection to my meter box? Where will the green dome go? Will my power supply be interrupted during the project? What if I need power on constantly because of a medical condition? Will all the old overhead power lines and poles be removed? How can I find out more information?

Project Cost FAQs

When will I have to pay for Underground Power How much will my underground power charge be? What is Gross Rental Value? Can I pay in instalments What pensioner and senior rebates are available? What if I can’t afford to pay the underground power invoice when I receive it? What happens to any outstanding monies owed on my property if I sell? Does the cost include the connection to my meter box? What if I already have underground power to my property? Why do I have to pay for underground power? What is the interest charge on overdue accounts? What if I have already paid for underground power for another property?