[1][2] Petitioning for the construction of a post office in the municipality occurred from as early as 1891;[3] however it was not until 1894 when local councillors approached the Member for Annandale William Mahony to secure funding.

[4] The building was built between 1895 and 1896 under the supervision of the New South Wales Government Architect Walter Liberty Vernon in the Federation Free Classical style and has been in continual operation as a post office since that time.

Constructed of brick, Sydney sandstone and timber, with terracotta tile roof, the two-storey building comprises many fine details of the style such as a single storey colonnade or portico shelter consisting of large stone piers with square half-columns set at 45 degrees, special moulded bricks are seen on the numerous arches as well as horizontal bands which continue the line of the stone window sills.

[5] An additional post office was located on Parramatta Road in the locale of Westgate, south of Annandale, constructed in 1913.

[6] Content in this Wikipedia article was based on the Annandale Post Office, listed on the "New South Wales State Heritage Register", published by the Government of New South Wales under CC-BY 3.0 AU licence (accessed on 12 October 2017).