At a cost of $641, the San Francisco 49ers now have the highest estimated price in the NFL for a family of four to attend a game.

The 49ers begin play this season at $1.2 billion Levi's Stadium in suburban Santa Clara, near San Jose. Kelley L Cox/USA TODAY Sports

The Fan Cost Index published by sports business publication Team Marketing Report includes parking, four average-priced tickets, two programs, two beers, two hats, four soft drinks and four hot dogs.

Rising to the top shouldn't come as a surprise to 49ers fans, as the new Levi's Stadium -- which had personal seat licenses ranging from $2,000 to $80,000 per seat -- was the key contributor to the rise. The average ticket price of a general seat (excluding club seats or suites) rose 40 percent in a year to $117 per seat, per game.

That ticket is the second-most expensive in the league, behind only the New England Patriots, whose average ticket price is $122 this year, TMR says.

Taking home the Lombardi Trophy led to a 13.4 percent increase in ticket prices for the Seattle Seahawks, behind only the 49ers as the biggest year-over-year change. Still, the Seahawks' average ticket of $80.77 is below the league average of $84.43.