A Long Island man whose neighbor killed himself in a fiery propane explosion two years ago says he’s being jerked around by his insurance company because it will pay to cover only a fraction of the damage to his home, a new lawsuit charges.

The massive 2014 blast sheared off the back and roof of Brian Tomeo’s two-bedroom in Port Washington, causing more than $800,000 in losses, according to his suit filed Monday in Brooklyn federal court.

Property-insurance firm USAA cut Tomeo a check for a little over $229,000 after its agents ruled that it could be repaired — and didn’t need to be demolished.

North Hempstead officials ruled that the home was unsafe and had to be razed, a job completed in March.