In pictures: Inside Severalls
North Essex Partnership NHS Foundation Trust intended to sell the Severalls Hospital site in 2007, however due to the downturn in the housing market the deal with a developer fell through.
Severalls was divided in half with single sex wards. For a period after opening in 1913 this applied to staff as well, with male doctors not being allowed into the female sections.
Arson attacks since 2002 have created serious fire damage on the Severalls Hospital site; it is now 12 years since its closure.
Experimental new medical techniques were used on patients up until the 1960s, such as electro-convulsive therapy and frontal lobotomies in the Severalls Hospital.
A small number of buildings on the site are still used by the NHS. Many of the unused buildings on the Severalls hospital site have widespread graffiti and vandalism in the former ward areas.
During the 1960s, drugs and medication were increasingly used to treat patients, along with an art and music therapy programme being developed. Currently, many of the buildings on the Severalls hospital site are unsafe.
The Severalls Hospital was the second Essex County Asylum, with the first being at Warley Hospital near Brentwood.
North Essex Partnership NHS Foundation Trust said the Severalls Hospital is private property and access is strictly prohibited.
The North Essex Partnership NHS Foundation Trust hope to sell the Severalls Hospital site to the private sector in the future for redevelopment.
Severalls Hospital has become popular with urban explorers who enter the site without permission and take pictures for posting on the internet.