Syosset station was initially built by the
Hicksville and Syosset Railroad in 1854. The station's former building was built in 1872. The building's first location was at Lockwood's Grove station, on the former
Cedarhurst Cut-off. The LIRR moved the building to Syosset station in 1877, as the
Far Rockaway – Lockwood's Grove station had since been abandoned. The building was renovated in 1944, then torn down and replaced in 1948. In 1970 the station was electrified, along with the rest of the Port Jefferson Branch between
Mineola and
Huntington stations. The station was again renovated from October 2018 to June 2019. This renovation included a new station house and a sculpture known as "Sail", designed by Tom Fruin. Digital signage with real-time information was also added to the station.
Transit-oriented development The Town of Oyster Bay has designated Syosset station as one of its targets for
transit-oriented development. Known as the "Syosset Downtown Redevelopment and Revitalization Plan," the project aims to re-create the hamlet's downtown through
mixed-use development and improved human-scale zoning regulations. The master-plan includes suggestions such as removing the grade crossing at Jackson Avenue, creating a pedestrian plaza by eliminating road traffic on a portion of Cold Spring Road, parking reconfiguration, and the building of a community center as ways of focusing growth in the downtown area and reducing unnecessary trips by car. ==Station layout==