Spurs will move grounds ahead of the 2018-19 season, with plans in place to play at Wembley next term as White Hart Lane – adjacent to the venue under construction – is demolished.
The new stadium was originally expected to have a capacity of over 56,000 seats, but the club have revealed that a change in design has enabled them to take the potential crowd beyond the Emirates' 60,432.
A club statement read: "Improved seating layout design has meant that we have been able to increase seating in several areas of the stadium. This will now see our official capacity rise to a total of 61,559.
"The biggest gain will be in the single-tier South stand, which will now be able to accommodate 17,500 spectators, an increase of 500.
"The new stadium will be the largest capacity football club stadium in London."