One of Glasgow’s leading museums is closing its doors for four years as a major refurbishment begins.

The Burrell Collection shut on Sunday evening and will reopen in 2020 after the multi-million pound redevelopment is complete. The building is said to be no longer fit for purpose and needs a new roof.

The Burrell Collection, in the heart of Pollok Country Park, opened to the public in 1983. Only a fifth of the collection, donated to the city by collector Sir William Burrell in 1944, is currently on display as many items have had to be removed to protect them from damage.

It is estimated that the total cost of the project will be between £60m and £66m.

Sir Angus Grossart, the chairman of Burrell Renaissance said: “The designs will see the museum undergo the most comprehensive modernisation since opening to international acclaim in 1983. The proposals will deliver the high quality and innovative solutions for this exciting project. We expect to be able to show previously unseen works from this rich collection, and strengthen the reach of this extraordinary world-class museum.”

Under the modernisation plans, a new roof and high performance glazing will make the museum more energy-efficient.

Two new floors of exhibition space will be created so that 90% of the 8,000 objects can be viewed by the public.

Architects John McAslan and Partners will work on the project.

Director Hannah Lawson said: “The Burrell provides an inspiring setting for shipping magnate Sir William Burrell’s vast collection of art and antiquities within a category A listed building of international significance. John McAslan and Partners are delighted to be leading a team dedicated to the comprehensive repair and refurbishment of this architectural masterpiece. By providing a new circulation core we can open up new parts of the gallery to visitors and greatly increase the display area for the collections.”

Imagery by John McAslan + Partners