After 100 years you (your grand children) will get a notice stating the lease is over. You would then have two options.This publication describes what the law requires of both landlords and tenants and also describes some terms that are in typical leases. Leases can be for any length of time, up to 99 years in most places. This handbook attempts to explain those rights. The Office of the Minnesota Attorney General certifies that this contract complies with the requirements of Minn. Stat. §325G. Ask the Minnesota Department of Revenue (MDR) for a Rent Paid Affidavit (RPA) to fill out instead of a CRP. Refer to IRS Form 8609 and 8609-A for detailed instructions. A 99-year lease is, under historic common law, the longest possible term of a lease of real property. The Vista portfolio of enterprise software companies drives positive change, innovation and growth across industries.