The Upminster Tithe Barn and Museum of Nostalgia is shut for the remainder of the 2025 season to allow for the works.
According to its website, improvements are being made to the barn’s structure and roof, thanks to funding by a grant provided by National Highways.
The barn dates back to the reign of King Henry VI and was constructed using oak felled between 1420 and 1440.
At almost 150 feet long, the barn is considered a rare survivor of medieval agricultural architecture.
It was repurposed in 1976 as a museum to allow for around 14,500 artefacts of domestic and agricultural use to be housed and displayed to visitors.
However, its future use following the latest repairs is unclear.
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Havering Council owns the barn and runs it in partnership with the Hornchurch and District Historical Society.
A spokesperson for the council said: “Further improvements to the barn are being planned, and the council is currently exploring options for what will happen with the barn once this is complete.
“No decisions have been made yet.”
