17yo DD keeps her own room tidy, dusted, hoover etc. She cooks for the family once a week, and for herself probably 4 other days most weeks.
She'll sort out the kitchen unprompted, wash up, put the dishwasher on, wipe the surfaces down etc. And she'll put a wash on the line or the horse if she notices it sat in the machine.
That's it for doing stuff unprompted. She'll put a wash on, hoover the house, do some dusting or gardening if one of us asks her to, but she'd never do it off her own back. She'll also get involved with helping with DIY.
The only things she's properly never done is clean the bathrooms, but only because we've never asked her to.
To be honest, she's probably out of the house more than us right now. She's got a worse commute for college than either of us, and between that, her job, driving lessons and homework / revision, she's probably got the least free time of the 3 of us, so we don't ask her to do that much right now.
I've got a list of jobs as long as my arm ready to chuck at her over the summer though.