Generally, everyone builds a house based on vastu shastra. There is a calculation on where the kitchen and well should be situated. Apart from this, there is no need for any other things. It is sufficient if Vastu homam is performed during Grihapravesam (Housewarming ceremony).
Notes:
These days everyone considers Vastu. All the demi-gods are present in a Vastu Homam and we have to conduct this with devotion as Emperuman is the inner Lord of all.