Thiruvattar is a large east facing temple where the Sanctum Sanctorum is west facing. The lord Adikesava Perumal is a large idol in lying posture seen through 3 doors similar to that of the Padmanabaswamy Temple in Thiruvananthapuram. Both the deities are considered to be connected as they are lying down in facing directions. The sanctum sanctorum is in typical Kerala Style with tiled roofs, wooden pillars, doors and roofs. The Outer prakarams are constructed with stone. The carvings on the Pillars leading to Sanctum Sanctorum from the west are exquisite, intricate and massive. Some of them are Oorthuva Thandava Murthy, Veerabadhra, Venugopala, Pitchadanar, Manmatha, Rathi, Lakshmana and Indrajit. There are 3 Prakarams. The middle Prakaram has large and long corridors all around with subtly different lamp holding maidens on the pillars. These corridors should present a beautiful picture when the oil lamps are lit in the festival seasons. An Otraikal Mandapam (one stone Mantapam) is an important feature in the temple. There is a separate shrine for Lakshmi Narayana Perumal opposite on the east in the banks of the river.