[3] Traffic to the west and south (and later north) of the state brought the need to amplify the line, first in 1891 when it was quadrupled and later in 1927 when it was sextupled (to Homebush) and electrified.

A footbridge was built at the western end of the platforms and connected to Meta Street by a ramp and to the land on the southern side by steps.

In 1892 the two additional tracks for the quadruplication were laid on the south side of the station, the contract being awarded to John Ahern for the building of the western footbridge and the new Meta Street overbridge.

The Edwin Street level crossing was closed and the post office relocated on the eastern side of the new island platform.

Two additional lines were built on the southern side and the old Up "fast" platform was demolished and the post office relocated outside railway land.

The station underwent upgrade works in 1994-95 including the removal of a section of footbridge, the shifting of the booking office to its current location, and new platform canopies.

[3] Croydon Railway Station has a moderate degree of integrity as its platform buildings are in a relatively intact condition.

However the relocation of the waiting room to Platform 1 and 2 and the booking office from the footbridge to the street level has affected the intactness of the station layout.

It is a single room, rectangular building with stretcher bond brickwork, chamfered corners and a flat roof with cantilevered awnings.

The window openings are original with concrete sills, steel frames and three paned fixed glass sashes.

Two original entrances into the waiting room which are positioned directly opposite each other consist of exposed brick frames and steel grill gates which are permanently locked.

[3] Original internal features include the asbestos sheet ceiling, the four steel I beam columns at the corners of the room and the timber bench seats.

[3] This is an initial island platform standard building and is a rectangular structure six bays long with Flemish bond brickwork.

The bays are defined by engaged brick piers that have concrete corbels and standard double bowed steel brackets that support awnings with curtain board fascia.

The only entrance to the waiting room is from the platform but it is no longer open to public access and has locked steel grill gates.

[3] The waiting room has retained a number of its original internal features, including the weatherboards, the ceiling rose, timber framed double hung windows with cast iron ventilators, a boarded up chimney breast and possibly early wooden benches.

[3] The waiting room is overall in a reasonable state of preservation with a moderate level of integrity, although a few elements have been compromised such as the original chimney breast which has been bricked up and the main opening which has steel gates added on.

The two star motif cast iron newel posts of the stairs to Platform 5 are remaining evidence of Inter-War building activity on the site.

However the 2 star motif cast iron newel posts of the stairs to Platform 5 are remaining evidence of Inter-War building activity on the site.

[3] The Strand/ Meta Road Overbridge crosses over the western end of the railway station platform and runs parallel to the footbridge.

[3] The bench seats in the waiting room of the platform building (1926) are original although they have been added onto (in a sensitive manner) and converted into shelves for storage.

The north-eastern platform, bordering Hennessey Street along with the discontinued and highly dilapidated section of the existing footbridge is of substantial archaeological value.

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

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

The 1920s "initial island" platform building has been altered internally but it retains a linear form, gable roof and integrated awnings.

The overhead booking office has been altered internally but it retains characteristic features of such buildings, namely the pre-cast concrete panels with weatherboard construction appearance and its location on the footbridge.

[3] The place has potential to yield information that will contribute to an understanding of the cultural or natural history of New South Wales.

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

The items at Croydon Railway Station which have aesthetic and technical rarity include the "Standard Eddy" platform building, the footbridge.

The platform building at Croydon Railway Station is in a largely intact condition externally and it is a good representation of the "Standard Eddy" design.