Also known asvastu shantihavanvastu devta vidhan
During the battle with Andhakasur a drop of sweat fell to the earth and produced a being whose rampage made the earth shake. Brahma had him lie face down and promised that he would be worshipped with offerings and that not an inch of land would be built on without remembering him.
The biggest pooja, havan and sthapana of the 45 devtas should be done at garbh vinyas or shilanyas, while the devtas are on open ground and can receive their samagri at their own pads; the building is then raised over them.
On the open plot, at each devta's own pad
Some texts use a word read as maans (meat) in devta offerings, but Vishwakarma Prakash clearly states that maash means black urad dal, made into a pithi (paste), not meat.
Vastu devta pooja bears fruit only when done by someone who represents Brahmin qualities by conduct rather than birth: vegetarian, of good character and pure in mind and feeling.
The deity faces East first and North second, never South; the worshipper faces North for wealth, East for spiritual progress and South or West for tantra, and before a consecrated idol all directions become zero.
Home temple, puja room and festival puja
Each zone suits a particular worship: North for Saraswati and Ganesh, NNE for pranic sadhana, NE and East for meditation, South for Hanuman and Devi, West best of all, while SE, SSE and SSW suit no puja.
Best: West. By deity: North, NNE, NE, East, South, SW (ancestors), WSW, WNW, NW, NNW. No puja: SE, SSE, SSW.
Yes, advise removing it: the North is Kuber's place, and keeping filth at the place of wealth is like putting dirt in the mouth, so wealth cannot grow. After any demolition do a Vastu pooja; even a short one is enough, offering 45 small pieces of gud to the 45 devtas or invoking the nine lords with Bho Indra Vastu Dev Vastu Shanti Kuru Kuru and so on for each direction, with Brahma at the centre.
No. Keep the samagri simple and do the pooja from the heart; any pooja is an offering of feelings, and what matters is the bhav offered, not whether paan or gud could be offered.
The water mantra chanted while pouring water into the pit is not found in Jinvani; it was to be shared with the class group (exact words: refer to the class recording), and the Gayatri Mantra can be used instead. The Bhoomi Jagran Mantra used for aahuti on the land is found in the book Pratishtha Parag, a text on pratishtha (consecration).
No. A farmer who sows a seed does not end his bond with it there: he protects, waters and nurtures it until it flowers, fruits and grows into a shady tree, even a kalpavriksha (wish-fulfilling tree). In the same way, Indian architecture holds that a structure of stone and lime is not lifeless; prana settles into the building and its soil and controls the feelings of the people who live there, so the devtas established in the land must keep being nurtured.
Students answered griha pravesh and bhoomi poojan, which is only partly right: the greatest effect comes at the garbh vinyas or shilanyas, the day the land is taken over and the foundation is laid. Then the pishach, manushya, dev and brahma bhoomi are marked, the vastu pooja is done and every devta, 32 in the pishach bhoomi and the rest inside, is worshipped at its own place with its samagri, following the vidhi. A child cannot be born without a seed in the womb, and food works only through the mouth, not the ear or nose, so the biggest pooja, havan and sthapana belong to that day; building over the devtas afterwards is like tethering a cow first and then building its shed. Done later, remedies bring back only about 35% of that role, though even 5% is a lot.
On the ground. That is why they should be established at the shilanyas itself, and their bhog samagri is offered on the ground at each devta's own place.
No, goods lying there are not arpan or samarpan. A guest never picks sweets off the dining table himself; they are served on his plate and he is invited to start. In the same way, serve the devta its bhog in a leaf dona or on a paan leaf, which the devtas love, and request it to accept the offering and increase the energy of the place. If the pooja was not done during construction, offer it at griha pravesh: any dish made in desi cow ghee, such as gujiya.
In a full vastu poojan all 45 devtas are worshipped and offered together. When one particular devta has to be activated, offer its bhog samagri or do its jaap in its own time slot for the maximum result. An offering at another time is not useless, but just as food eaten at the fixed time of hunger satisfies more, the result differs.
In a vastu pooja all 45 devtas are activated together in one sitting. A single devta can also be activated on its own with its samagri at its own time.
No. Do it at bhoomi poojan or shilanyas, when the first slab is laid, when the main door frame is installed and on griha pravesh; the start of construction and griha pravesh are essential. Also do it after a renovation in which walls are broken, for a marriage, the start of a job or business and the birth of a child, and once a year on a swayam siddh muhurta such as Akha Teej or Gudi Padwa for a year of happiness and peace.
Someone who represents Brahmin qualities by conduct, not by birth: a vegetarian of good character with a pure mind. A person who eats non-veg, drinks or does wrong deeds turns the pooja into a mere show. Wear the janeu, purify yourself and wear clean or new clothes.
There are 45 devtas, but 4 more devtas stand on all four sides to protect them, so basically there are 49. Bhog samagri is offered to these 4 guardians as well, after the 45.