The Sreekovil (Sanctum Sanctorum) is designed in 2 layers with copper sheet roofing plated with gold. The deity is in the traditionally orthodox form of Mahavishnu, with all the compliments – four arms each carrying sankh (conch), chakra(wheel), gadha (club) and padmam (lotus). The Moolavigraha (main idol) is made of Pathalanjana Shila and is considered extremely sacred.
There are two more idols one of silver and the other of gold of which the silver idol is more older. These are used for the seeveli and other processions. Generally the gold idol is GURUVAYUR DEVASWOM used and the silver idol which is more older is taken out only for Arattu and on a few special occasions. There is a repletion of traditional mural paintings on all the three sides, depicting sequences from puranic tales and Krishnaleela. There is amorous and erotic accent in the murals.
The old doors of Sreekovil are replaced with a new set secured with gold plated bars and embellished with golden bells. There are 101 bells, all made of silver and plated with gold.
Sopanam, the steps leading to the Sreekovil, are made of stone with carvings and designs of attractive craftsmanship.