The old Leckwith Bridge dates from at least the early 16th century, referred to in 1536 as being "soundly built of stone". It was probably partially rebuilt in the 17th century and the central arch being rebuilt during the 18th century. The bridge has three arches built of rubblestone. The roadway is approximately 2.75m (9 feet) in width, with the addition of pedestrian refuges above pointed cutwaters between each arch.
A new single span reinforced concrete bridge was built next door to the old bridge in 1935, taking the main road between Cardiff and Leckwith village. It was opened on 17 April by the Minister of Transport, Leslie Hore-Belisha. The road continues west on a 150m (500 feet) concrete viaduct. By the 2010s the new bridge was in poor condition with weight restrictions imposed on it.
- "Old Leckwith Bridge (partly in the Michaelston community), Canton". British Listed Buildings. Retrieved 14 December 2014.
- "Leckwith Bridge To Be Closed Next Week For Major Repairs". Penarth Daily News. 14 February 2014. Retrieved 14 December 2014.
- "Leckwith Old Bridge, Leckwith, Cardiff". Royal Commission on the Ancient and Historical Monuments of Wales. Retrieved 14 December 2014.
- "Leckwith New Bridge And Viaduct, Leckwith, Cardiff". Royal Commission on the Ancient and Historical Monuments of Wales. Retrieved 14 December 2014.