The temple has beautiful timber carvings. The mural painting is also old. You can see the best craftsmanship in this temple, but this has been badly damaged.
History has it that when King Marthanda Varma conquered Vadakkumkur he gifted Ettumanoor Temple with abundant of gold and Vaikom Mahadeva temple with lands. Along with these temples he renovated the small temple of Mahadeva in Koothattukulam into the present one. The sculpting was done by “thachans” or traditional craftsmen.
The sculptural ingenious of the traditional sculptors is evident from the wood work of the intricate ceiling which depicts Lord Vishnu’s ten incarnations, is reasonably intact even today. The Mahadeva temple has a prominent place among the 108 famous Shiva temples in Kerala. The idol of Lord Shiva with a pleasant emotion alongside with Parvati, Subramanian and Ganapati is a rarity.