Vastu Shastra is believed to be backed by astronomical science.
A home or a building structure built as per vastu compliance is said
to be blessed by Vastu Purush
Vastu Shanti Puja is believed to remove the ill-effects of Vastu
Doshas of a particular plot, building or house.
Because of space constraints, many structures and homes built in
urban areas are not in compliance with vastu. Majority of the times,
making structural changes in accordance with vastu is impossible. In
such cases, Vastu Shanti Puja becomes very crucial to appease the Lord
and Deity of the House.
To be more precise we pray to the Lord of the directions, five
fundamental elements of nature and other natural forces. The five
elements as per Hindu Vedic texts are Prithvi (Earth), Agni (Fire), Jal
(Water), Akash (Sky) and Vaayu (Air).
With the Vastu Shanti Puja one can also beg for mercy in case the
construction has caused any harm to any sort of living beings like
trees, animals, birds, insects etc.