Willing house to 3 children in equal shares

[trojan]

If an owner does this can the beneficiaries, on death of the owner, agree among themselves to share proceeds in a difference ratio and would this have any tax implications. Each share would be well within the threshold of 308k not sure of exact figure

 

[Seagull]

The difference in value between 1/3 the value of the house, and whatever was received would be considered a gift. Depending on the amount, it might be liable for gift tax.