If a few days before Eid a family member died, will it be permissible to celebrate Eid in the home of the bereaved?
There is no ritual or practice of Eid celebration in Islam. Eid is an auspicious Day. The following acts are to be observed on the Days of Eid:
1. It is not permissible to fast on Eid days.
2. Eid Salaat is incumbent
3. Best clothes should be worn,ittar applied, ghusl to be taken.
4. If it is Eidul Fitr, then before leaving for Eid Salaat to eat something sweet.
5. To recite the Takbeer as explained in the masaa-il.
6. If it is Eidul Adha, then to make Qur’baani.
These rules apply to all Muslims regardless of any death having taken place even on Eid day. If by celebration you mean preparing delicious food, cakes, etc., then this is permissible for all even for those in whose home someone had died during Ramadhaan.
Eid is not a day for visiting and merrymaking in the way in which Muslims are today emulating Christians whose Christmas day is an occasion of fun and merrymaking.