SANTA CLARA, Calif. — Kevin and Tara Stinson have waited five years for Levi’s Stadium to feel like home. When they had season tickets at Candlestick Park, where the San Francisco 49ers played until 2013, the tailgating was livelier, the stadium was noisier and the fans were family. In the half-decade since the 49ers moved to Silicon Valley, the Stinsons, who bought season tickets here, too, have watched a merry-go-round of coaches, quarterbacks and losing teams that won just 25 games in the past five seasons. The team’s marketing slogan, “Faithful Then, Faithful Now” seemed like more of a question than a statement.

Now the 49ers are in the midst of a turnaround season, atop the N.F.C. West and destined for the playoffs, and Levi’s Stadium is decidedly different from its early years. Tailgaters are lining up hours in advance to get into the parking lot, season ticket holders are using their tickets instead of dumping them on StubHub and the buzz inside the building rivals the old days.

“It has the feel of Candlestick,” Tara said, who drives two hours from Modesto with her husband to tailgate before games. “Winning changes everything.”

The winning continued on Sunday as the 49ers blew out the Green Bay Packers, 37-8, in a potential playoff preview. The 49ers, who clinched their first winning record at Levi’s Stadium, are now 10-1, one game ahead of the Seattle Seahawks and New Orleans Saints for best record in the N.F.C. After going 4-12 last season, the 49ers are in position to host a playoff game for the first time in their new home.