In Jain Dharma, house-warming puja is not judged only by nakshatra. The main focus is shuddhi, ahimsa, satya, and a pure intention.

If your family follows muhurat-based tradition, then Uttar Bhadrapada may be used only if it is considered auspicious in your local Jain custom. But from a Jain spiritual view, the most important thing is purity of conduct, not the nakshatra alone.

So the simple answer is:

• Yes, you may do it if your Jain tradition and learned advisor consider it suitable.
• No, it is not compulsory to wait for that nakshatra for spiritual merit.
• A clean, शांत, non-violent, and श्रद्धापूर्ण house-warming is more important than astrology.

In Jain practice, avoid any ritual that involves himsa, intoxication, or unnecessary excess. A simple, devotional, and sattvik puja is best.