While Progressive boasts some of the broadest acceptability in the business, there are some types of vessels that can't be added to a new or existing Progressive policy: Boats 0-10 years old and worth more than $500,000 Boats 11-20 years old and worth more than $350,000 Boats more than 20 years old and worth more than $75,000 Boats used as a primary residence (live-aboards) All houseboats Homemade boats without a hull identification number Boats with more than two owners Boats with steel or wood hulls All amphibious land boats, hovercraft, or airboats PWCs worth more than $27,000 Boats that don't meet published U.S. Coast Guard standards We also can't insure boats over 50 feet in length. In some hurricane-prone states, the limits can be 35 feet and $175,000 in value.