Shendurney Wildlife Sanctuary was constituted as per Government order dated 25th August 1984, considering its ecological, faunal, floral and geomorphological importance. Originally it was a part of Kulathupuzha Reserve in Thenmala Range under Thenmala Forest Division.
A separate Shendurney Wildlife Division was formed in 1996 comprising of Shendurney Wildlife Sanctuary and Peppara Sanctuary. In 1998, Peppara Sanctuary was carved out and added on to Thiruvananthapuram Wildlife Division leaving only Shendurney Sanctuary in Shendurney Wildlife Division. The notified area of the sanctuary is 100.32 sq.km. The map developed through GIS recorded an area of 172.4 sq.km. The finding was verified in the field by the staff using GPS points and again confirmed by the GIS wing as 172.403 sq.km. Hence a re-notification proposal has already been submitted to the government to notify the area of the sanctuary as 172.403 sq.km.