re: As in the estate tax...
You really want to keep homes out of it as assets. One of the drivers of Prop 13 out here was people's homes increasing in value and the ever-growing taxes breaking their backs. Elderly people who had bought their homes decades ago were getting especially busted by this. Unless you borrow on it, or it's a rental property, a house is not a real source of income.
A true liquid asset, like a bank account or something like that, you could include. 401Ks are not that liquid, as you can only withdraw limited amounts, even after retirement age.