If your child is 26, he or she will always be your child, but they are, by definition, an adult.
Do you want him (for ease of writing I'm saying 'him', do correct me if you have a daughter) to move out of home, or simply be less dependent on you?
You should certainly be equipping him for the big wide world by training him in washing, ironing, cooking, and generally running a home - he will have to be alone eventually, so better that he is prepared, it's less of a shock when the day comes.
Ho;e this helps - feel free to post with more details if you need more advice.