If you own your house and turn it into a Smart Home then it is quite simple; You own your data. And it will be valuable. You have all the rights to sell it or trade it to different service providers, like the power, cable or home security company. Maybe you don’t think about that every time you sign a contract for a service, but you should read the small print and see that you get value for your data. Or the service provider might try to generate value from your data without giving anything back to you.
But if you rent your place then things get more complicated.