Gruha pravesha puja’s principal lord is vastu purusha when we  move to newly constructed house we perform vastu shanti which includes ganapati, navagraha, mrutyunjaya, vastu, lakshmi, kula devata, astta dikpalaka, pancha loka palaka puja and homa(havan) followed by satyanarayana vratha. This puja clears the vastu doshas, bhoo doshs, muhurtha doshas etc…