Whether there is a step-up in basis depends on the type of trust and the terms of the trust. If your parents reserved the right to use and enjoy the property during their lifetimes, then the house for tax purposes should be considered to pass upon death, be part of their taxable estate, and you would get the step-up. That way the basis when you sell the house is considered the date of death value. You need to have an attorney check the trust terms to make sure it was properly done.
Answered on Jan 22nd, 2012 at 12:41 PM