Historical period - 1926–1950[1] The Pymble Zone substation/depot is a large and elegant parapetted one and two storey structure with roofs of varying heights, round headed windows, and contrasting lintel pediments.

The Pymble Zone substation/depot is constructed in load-bearing face brick with externally expressed engaged piers.

Exterior materials used include face brick, cement render, and steel roller shutter.

As at 21 October 1998, the Pymble Zone substation/depot is an elegant and refined example of a well detailed face brick substation building designed in the Interwar period.

[1] This Wikipedia article was originally based on Substation, entry number 00940 in the New South Wales State Heritage Register published by the State of New South Wales (Department of Planning and Environment) 2018 under CC-BY 4.0 licence, accessed on {{{accessdate}}}.