Lockside Marina sits on the River Chelmer near Springfield Lock in Chelmsford, Essex. It is a waterside residential development comprising 109 units built around a small marina basin, with direct frontage onto the river.

The marina basin serves as the focal point of the development. The site was developed following the restoration of Springfield Basin, which reopened for recreational use in 1993.

That restoration spurred redevelopment of the surrounding area, with Lockside Marina among the projects to emerge on the riverbank. It is listed as a marina access point on the River Chelmer, a 21. 9 km inland waterway navigable to the North Sea.