John Banks has some support in the wealthy suburb of Remuera, but is less popular on the liberal fringes of the Epsom electorate, according to a Herald street survey.
A poll of 47 Epsom voters yesterday found the National candidate ahead of Act's Mr Banks by 22 votes to 20.
For the party vote, National in front with 34 votes, followed by the Greens on seven and Labour on four. One voter was undecided on his candidate preference but did select a party.
The unscientific poll and people's comments reflect the tactical voting taking place in Epsom which will determine whether Act returns to Parliament. The latest Herald-DigiPoll survey has Act at 0.9 per cent, well short of the 5 per cent threshold.
Prime Minister John Key, who has said National is campaigning for the party vote in Epsom, told Newstalk ZB it was "early days" whether he would have a cup of tea with Mr Banks.