Tottenham could continue playing at White Hart Lane next season, according to chairman Daniel Levy.
Spurs are having a new stadium built next to their existing home and had been expected to play at Wembley next season while the project is completed.
But Levy is seeking "greater certainty" over the delivery of the stadium in time for the 2018-19 campaign.
Spurs have until Friday to activate an option on Wembley after an application to host 27 games was approved.
Tottenham have played Champions League and Europa League ties at Wembley this term but won one of just four games at the national stadium as they made early exits in both competitions.