New data suggests Hawke's Bay home buyers may be letting superstition influence their decisions.
Homes.co.nz, which publishes sales histories and values, has analysed the relationship between letterbox numbers and house values.
Its estimated median value for a property at number 13 was $333,000, the lowest estimate for any number under 20. The next lowest valued number was 17.
The most valuable street number in Hawke's Bay was two, with a median estimated value of $382,000. The next most valuable numbers were three and six.
Numbers six, eight and nine are considered lucky in Chinese culture.