Barrow have booked their place in the Blue Square Premier after beating Stalybridge Celtic 1-0 in Friday's Blue Square North play-off final.
Matt Henney grabbed the only goal at Burton's Pirelli Stadium.
Eastbourne Borough were also promoted after two late goals helped them beat Hampton & Richmond in Thursday's Blue Square South play-off final.
The East Sussex won 2-0 thanks to two goals in the last five minutes of the game, which was played at Stevenage.
Substitute Nathan Crabb and Paul Armstrong were on target for Borough.
BLUE SQUARE NORTH
Semi-final first legs (Wednesday, 30 April):
Barrow 2 Tait 72, Rogan 82
AFC Telford United 0
Att: 2,701
Southport 1 Blakeman 36
Stalybridge Celtic 0
Att: 1,361
Semi-final second legs (Sunday, 4 May):
AFC Telford United 0
Barrow 2 Reynolds og 33, Tait 78
Att: 4,123
Barrow win 4-0 on aggregate
Stalybridge Celtic 2 Winn 31, Payne 70
Southport 1 Sykes og 87
Att: 1,735
Agg 2-2; Stalybridge win 5-3 on penalties
Play-off final (Friday, 9 May, at Burton Albion):
Barrow 1 Henney 58
Stalybridge Celtic 0
Att: 2,530
BLUE SQUARE SOUTH
Semi-final first legs (Tuesday, 29 April):
Braintree Town 0
Eastbourne Borough 2 Tait 31, 68
Att: 1,017
Fisher Athletic 1 Tomlin 59
Hampton & Richmond Borough 1 Hodges 34
Att: 450
Semi-final second legs (Saturday, 3 May):
Eastbourne Borough 3 Tait 43, Crabb 86, Atkin 90
Braintree Town 0
Att: 1,802
Eastbourne win 5-0 on aggregate
Hampton & Richmond Borough 0
Fisher Athletic 0
Att: 1,489
Agg: 1-1; Hampton & Richmond win 4-2 on penalties
Play-off final (Thursday, 8 May, at Stevenage Borough):
Eastbourne Borough 2 N Crabb 85, Armstrong 90
Hampton & Richmond Borough 0
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