Boeser, who had 56 points (26 goals, 30 assists) in 69 games last season, said July 10 he was optimistic he would sign.
"I feel confident we're going to get the deal done and everything's going to work out," he said. "I love Vancouver. The organization, the city, the fans, everything's great there, and I want to be there for a long time."
Boeser had 55 points (29 goals, 26 assists) in 62 games as an NHL rookie in 2017-18, when a back injury sustained March 5 ended his season. He finished second in Calder Trophy voting as NHL rookie of the year that season behind Mathew Barzal of the New York Islanders.
Boeser missed 13 games last season with a groin injury.
NHL.com independent correspondent Kevin Woodley contributed to this report