This is one of the biggest DIY project I ever made, a sliding door between the entrance and the playroom. It took me two days to complete but it totally worth it! Now, I can hide the playroom mess easily when someone knock the door! The door was build with a wood frame and plywood panels. I used a curtain rod and caster to make it slide. You will find the detailed tutorial on Bob Vila.
A sliding door is a good solution is you want to separate spaces but have no room for a regular swing door. Or if your doorway has no standard dimensions.
You can adapt the sliding door dimensions to any room.
A before pic, that way you can appreciate the work 😉
View from the entrance. And the tutorial to make those nice wall lamps is HERE.
And view from the playroom.