Chelsea chief Ron Gourlay admits the club cannot stay at Stamford Bridge in it's current form.
Gourlay insisted that it was imperative a solution was found, claiming the club has "outgrown" Stamford Bridge.
"We have one of smallest stadiums in Europe," Gourlay told the International Football Arena in Zurich.
"We have corporate hospitality that is second to none and 30,000 season ticket holders. But we have a stadium slightly larger than 40,000 which drops to 38,000 on Champions League nights.
"We have to find a solution."
He added: "We have outgrown our stadium and tried every way possible to extend capacity.
"We need a 60-65,000 stadium. We have the eighth biggest stadium in England and the 61st biggest in Europe.
"But when you look at the activity of stadiums planned for next few years, we will fall out of top 75 which can only be restrictive to the football club.
"In the meantime we continue on our conversations to see if there is any way at all to extend Stamford Bridge."