If you can fit it into Code Section 2036, he would get stepped-up basis.  From the Regulations:

D transferred D's personal residence to D's child (C), but retained the right to use the residence for a term of years. D dies during the term. At D's death, the fair market value of the personal residence is includible in D's gross estate under section 2036(a)(1) because D retained the right to use the residence for a period that did not in fact end before D's death.