My son is 9 (10 in Nov.) and he pretty much is capable of doing anything I ask, but his responsibilities are the trash, taking care of the dog, keeping the kids bathroom clean, helps with laundry(he knows how to do it on his own), washes dishes, sweeps, mops, vacuums, dusting, ect.
He doesnt do everything on a daily basis, but they are all part of his responsibilities.
I am a firm believer that if you live under this roof your contribute to the upkeep of our home.
I have a 7 year old dd, and a 4 year old ds that are also included in the household upkeep.