Vellayambalam hosts buildings of a number of governmental and other institutions ranging from
KELTRON, Kerala's Electronic hub, Latin Arch Bishop's House, St. Theresa of Lisieux church, Police Headquarters, Trivandrum Planning Board, KFC-Kerala Financial Corporation, KPCC centre,
Kerala Water Authority, Ambedkar Hostel for boys, Air India's District Office and the Institute of Engineers Hall.
KELTRON constitutes the major portion of the place with its development center, internet cafe, CUSAT educational programs. A major number of travel agencies operate in and around this area. The office of
Centre for Development of Advanced Computing (CDAC) is also situated here. Raj Bhavan, the official residence of the Governor of Kerala, is situated here and forms a major landmark. Vellayambalam Palace today houses one of the electronic companies named Keltron. The place stands in its full beauty during Onam. Yakshi Amma Althara Temple forms an important temple in Vellayambalam. The temple is constructed around a huge Banyan tree. Rajapatha starts from Kowdiar and goes through Vellayambalam, the buildings here are beautifully illuminated with colorful lights in the eve of Onam. Trivandrum International Airport is about 12 km and the
Thiruvananthapuram Central Railway Station is 5 km away from Vellayambalam. ==Entertainment==