File:Hammersmith Bridge - 52253577523.jpg

English: A group of local people proposed a new bridge at Hammersmith rather than detouring to either Kew Bridge or Putney Bridge to cross the river. The construction of the bridge was first sanctioned by an Act of Parliament on 9 June 1824, which established the Hammersmith Bridge Company. Work began on site the following year, and the bridge was opened on 6 October 1827. Construction of the bridge cost some £80,000.

It was the first suspension bridge over the River Thames and was designed by William Tierney Clark. A further Act of Parliament was obtained in 1828. The acts also included powers to acquire land by compulsory purchase in order to build approach roads, and required the company to purchase the entire Barn Elms estate (the surplus land was subsequently sold). Hammersmith Bridge Road in Hammersmith was also constructed with the bridge, together with Upper Bridge Road (now Castelnau) and Lower Bridge Road (now Lonsdale Road) in Barnes. It was operated as a toll bridge, with the toll house located at the Hammersmith end of the bridge.

The current Hammersmith Bridge was designed by Sir Joseph Bazalgette and rests on the same pier foundations constructed for Tierney Clark's original structure. The new bridge was built by Dixon, Appleby & Thorne and was opened by the Prince of Wales on 11 June 1887. With much of the supporting structure built of wrought iron, it is 700 feet (210 m) long and 43 feet (13 m) wide and cost £82,117 to build.

Hammersmith Bridge has long suffered structural problems and has been closed for lengthy periods on several occasions, due to the weight and volume of road traffic now common in inner London, which the bridge was not originally designed to support. A £6m, 46-week stabilisation plan designed by consultants Mott MacDonald was approved by Hammersmith and Fulham Council in August 2021. This initial pedestrian stabilisation plan is the first phase of works on the bridge. A second phase, involving extensive strengthening and full restoration, will allow the bridge to eventually reopen to motor vehicles.

In July 2022, the chains were wrapped in foil and cooled with air-conditioning to 13°C during a heatwave to prevent further cracking.