My house is number 15. Should’ve been number 13 but was new build and developers don’t number any 13’s. Have had a very happy 12 years here, just sold as bursting now with 3 dc. New home is number 11 and next door is number 15, no number 13 either.
We bought and now live at house number 13. Doesn't bother us. We also have friends who live at a number 13 on our old street.
But what kind of area is it? Our area has a lot of science-based jobs nearby so maybe attracts more people who are less likely to be superstitious? Also other cultures have different unlucky numbers so the ethnic mix might influence the pool of buyers who would not be bothered.
I think I would try for a small discount on the basis that it does put some people off.
We viewed a no 13 (ended up buying number 3 on the same street but that definitely wasn't why!). No 13 still hasn't sold nearly a year later but I doubt it is down to the number. Sorry that was a very unhelpful post!