Sharaa, who headed the Islamist rebel group that led a lightning offensive that toppled autocratic President Bashar al-Assad in early December, was declared transitional president on January 30.
"I estimate that the period will be between four to five years until elections because there is a need for a vast infrastructure, and this infrastructure needs to be re-established and establishing it needs time," Sharaa told Syria TV in an interview.
He said Syrian authorities would need to consolidate data on the country's population to update its electoral data, adding: "Without this matter, any elections held will be doubted."
Syrian electoral infrastructure needs to be re-established before elections can be held, Sharaa says (EPA PHOTO)
Sharaa said Syria would apply international norms on transitional periods, including how they apply to a president during that time. Based on those norms, he said, Syria would "ultimately go to an elected presidency and an elected authority."
He did not specify which international norms he had reviewed to determine the timeline he set out.
When Sharaa was declared transitional president, he was also empowered to form a temporary legislative council for a transitional period and the Syrian constitution was suspended.
He has pledged to embark on a political transition including a national conference to produce an inclusive government.
Sharaa said a preparatory committee would be formed to hold consultations across Syria.
"Then, it will invite those we think represent the Syrian people in general," he said.
The conference will discuss "all the important problems in Syria" and produce a final statement that would form the basis of a "constitutional declaration," he said.
Sharaa had said in December that drafting a new constitution could take up to three years.