Histon have booked their place in next season's Conference National division by winning the Conference South title.
Histon's ground has been approved for promotion to the Conference
Adie Cambridge scored the 89th-minute winner as the Stutes defeated Welling United by a single goal on Saturday.
They will be joined in the non-league top flight by the Conference North champions, as well as play-off winners from both Conference North and South.
It is the second divisional title in three years for Histon, who were Southern League champions in 2004/05.