6 October 2015 Last updated at 09:14 BST
Jenny went along to meet one family in the north of England who've had quite a few eight-legged visitors.
They're even keeping one as their pet.
Vanessa from Bugslife, a conservation charity, went along too, to talk about what you should do if you spot a spider, and why they are so important.
It's usual to spot spiders inside the house around autumn time, but are there more around this year, and are they bigger than usual?