Investors are more likely to ditch their plans to invest in new homes if Labor introduces its crackdown on negative gearing and capital gains tax breaks, according to a new poll.

The poll of more than 1000 people, taken by Newgate and commissioned by the Property Council of Australia, showed that 33 per cent of potential investors surveyed said they would buy a newly built investment property under existing tax arrangements. But that number drops to 24 per cent if Labor's proposed crackdown is implemented.