Is it too late to add to a bankruptcy filed in 2001?

Your facts as stated make no sense.  First of all, in any bankruptcy case you are required to list all assets and all debts.  A failure to do that is grounds both for denial of your discharge (or, in your case revocation of your discharge), and possible criminal sanctions.   I'm not exactly sure what you mean by "include", but if that's what you meant, you should visit a bankruptcy attorney who is a certified specialist and evaluate your options. Your spouses parents living in the property has/had nothing at all to do with the requirement to list the property in the bankruptcy schedules.    Not only that, filing bankruptcy does not alter title to the property, so I'm sorry, but when you say you want to reopen the case to "straighten out title" that simply makes no sense at all. Mark Markus has been practicing exclusively bankruptcy law in California since 1991.  He is a Certified Specialist in Bankruptcy Law by the State Bar of California Board of Legal Specialization,  AV-Rated by martindale.com, and A+ rated by the Better Business Bureau.