The railway station and the Newtown Tram Depot were jointly added to the New South Wales State Heritage Register on 2 April 1999.

The existing access to the platform, via a single narrow flight of stairs connected to a heritage entrance building on King Street, was closed but retained as an emergency exit.

[7][8][9] The station features a single island platform located in a shallow cutting, served by one pair of tracks.

On the King Street elevation, the brick walls are painted and have a cement rendered coating about 1500mm high along the footpath.

The hipped roof is covered in shingle terracotta tiles and surmounted at the centre by a square louvre-vented bellcote, which is clad with ribbed lead, and capped by a helmet dome.

The semicircular window to King Street has anti vandalism reinforced fibreglass fitted to most of the panes and security bars to the inside.

[3] To King Street is a timber framed veranda, supported on six cast iron columns, with a skillion roof with corrugated steel sheeting.

Still present are early 20th century glass sphere incandescent pendant footpath lights as well as later fluorescent fittings.

To the railway side (east) is a small concourse, partly sheltered by a cantilevered awning with standard double bowed steel brackets supported on decorative cement haunches.

The stair has a painted brick enclosure under the landing which is the toilet facilities for the shop (on the northern side of the booking office).

The concourse once contained the 1891 iron passenger footbridge leading to the platforms (which have now been removed) and it was replaced in 1927 by the present concrete deck on steel girders and a face brick balustrade.

This elevation has a mass of poorly executed service runs and conduits which have an extremely negative impact on the building.

[3] Internally, the building generally has painted brick walls laid in English bond, a concrete floor covered with a variety of contemporary finishes and painted timber boarded ceilings with stepped cornices between arched timber roof trusses (which appear to remain for the full length of the building).

[3] Formerly the parcels and ticket office, and converted in 1927 into its present configuration with widened doorways each side which are now fitted with modern heavy hinged and fixed steel grilles.

The north boarded wall has been fitted with two modern security ticket windows with 19th century inspired architraves to the public side.

An early 20th century indicator board is placed near the doorway[3] Originally part of the main public booking hall, this space was converted in 1927 into the ticket office.

[3] This is a rectangular (painted) face brick building, originally with a gabled roof and integral shallower sloped single cantilevered awning.

The awnings have standard double bowed steel brackets supported on decorative cement haunches and bolt fixings to the station building brick walls.

The building has simple bargeboards and fascias which have replaced the original vertical timber boards which formed a valance at each end of the awning.

The stair is contained within brick walls with a bull-nosed capping and has modern tubular steel handrails, which continue on to the platform.

The beams and girders are supported in turn by a series of massive load bearing brick structures containing rooms now unused.

[3] Newtown railway station was listed on the New South Wales State Heritage Register on 2 April 1999 having satisfied the following criteria.

The subsequent (second) building of the station on the present station site was a result of the 1891 quadruplication of the line and the extant overhead booking office and King Street overbridge dating from this time period represent the expansion of the railways in the late 19th century to accommodate increasing rail services.

[3] The place is important in demonstrating aesthetic characteristics and/or a high degree of creative or technical achievement in New South Wales.

[3] The place possesses uncommon, rare or endangered aspects of the cultural or natural history of New South Wales.

[3] The King Street overbridge with most of its original fabric intact is a good representative of deck-style plate girder bridge construction.

[3] This Wikipedia article contains material from Newtown Railway Station group and Former Newtown Tramway Depot, entry number 1213 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 13 October 2018.