' ( "house-lord", an inflected compound of vÃÂstos, the genitive of vÃÂstu "house", and pati "lord") is a Hindu god that presides over the foundation of a house or homestead, mentioned in Mandala 7.55 of the Rigveda. In the Rigveda, VÃÂstoá¹£pati is also referred to as pá¹ÂdÃÂku-sÃÂnu, or 'he whose back is speckled'. As a topic, Vastuvidya, also known as VÃÂstuà ÂÃÂstra, contains regulations about residential building construction and which sites are chosen for this purpose. The 52nd chapter of the Bá¹Âhat Saá¹Âhitàis entirely devoted to the topic of Vastuvidya, including the house layout, proportions, orientations of different areas of the house, and how construction varies for queens, kings, officials, people, etc.
VÃÂstu means the site for building and also the house. Hence vÃÂstu pà «jàmeans the worship of the site chosen for building a temple or a house. It is treated as a must for safe and sound construction.