Labour list MP David Parker will contest the Epsom electorate for Labour.
Mr Parker has been a Dunedin-based list MP but is spending more time in Auckland, where his partner, Barbara Ward, lives.
Former Act leader Rodney Hide holds the seat with a 12,882 majority, after an electoral accommodation saw National campaign primarily for the list vote.
Former National Minister turned Act member John Banks will now contest the seat for Act and a similar electoral accommodation is expected to be confirmed between Act and National.
National's candidate is former Auckland City Councillor Paul Goldsmith.