The station is on the Ellenbrook line, which is owned by the Public Transport Authority, a state government agency.

The platform is linked to the north and south by a concourse bridge, which is connected to ground level by lifts and stairs, with provisions for escalators to be built in the future.

[1][2] As of the time of construction, the Ballajura station site is vacant rural land, with the nearest residential and industrial areas on the other side of Tonkin Highway and/or Marshall Road.

[2] To the south and south-east, on the other side of Marshall Road, are the residential areas of Beechboro and Bennett Springs.

Near the entrances are two pairs of sculptures by Peter Farmer and Jason Hirst representing how the Indigenous Noongar people travelled together in search of food and water sources.

[14] Constructing the Ellenbrook line by 2023 as part of the Metronet project was committed to by the Labor Party before it won the 2017 state election.

[18][19][20] The A$753 million main construction contract for the Morley–Ellenbrook line was awarded to the MELconnx Consortium, consisting of Laing O'Rourke, in October 2020.

[21][22][23] Early works for Ballajura station were underway by August 2021, starting with the set up of site compounds.

[28][29][30] By November 2022, construction on Ballajura station's foundations was underway, and piling for the Beechboro Road North bridge was complete.

[28] The footbridge's design was revealed to the public in July 2023, as an arch bridge with a span of 90 metres (300 ft).

[32] By March 2024, the station was nearly 75 percent complete, with structural works finished and lift installation beginning.