Parkside Avenue is an open-cut (trenched) BMT Brighton Line Station. The station is a local stop with two-side platforms for the four tracked line. The station has its one main exit towards the middle of the platforms, here two staircases from each platform go up to a small station house that is located at street level above the tracks. The station house is of a quite decent sized and is tiled, it looks like it's original is in extremely good shape. There are still the light fixtures that have original incandescent light bulbs burning in them although florescent lights have been added to compliment these, and provide more light in the station house. The station house's doors lead out to the north side of Parkside Avenue, just east of its intersection with Ocean Avenue, and an entrance to Prospect Park Drive because this intersection is at the Southeastern end of Prospect Park. South of the station house, the station feels underground, because cross-streets and houses have been built over the trench. There is a secondary exit here that is only from the Coney Island-bound platform at its extreme southern end. A High Exit Turnstile leads to a short concrete tunnel and then up to a street stair that looks like a standard underground subway entrance. This street stair is located at the SW corner of Woodruff Avenue and Ocean Avenue. This station gets the award of being the only stop that is not considered to be underground that has a street stair as an exit.

The station platforms feel like their underground for the southern half of the station and are covered for most of their northern halves by a concrete canopy. The extreme northern ends are completely exposed to the elements and have concrete walls, the rest of the lengths of the platforms have concrete columns that are painted red and a good portion of the walls are tiled with small name tablets that are written in a modern-font and say Parkside Av. The tiling forms diamonds on eitherside of these name tablets. The tops of the platform walls are painted red, forming a bit of a trim-line to complement the white tiles and bare portions of the walls.