Toilets, Sinks, Showers, Tubs and Disposals - Toilet Bubbling & Tub backing up when plunged

My toilet has been bubbling and won't always flush and on occasion the tub doesn't drain real quickly either. This is a newly installed bathroom in the basement. The bathroom was plumbed by a professional and is about 1 year old.

The main level bathroom appears to be working just fine (original with the house). Not sure why why the issue is isolated to only the basement bathroom and is now just becoming a problem.

Is this something a drano brand cleaner could fix or is there a more serious problem. Any advise is greatly appreciated.
Thanks.

Were I to make an educated - though blind - guess - I would think you have an obstruction in the drain line between the basement bathroom and the main stack where it was tied in. The best fix is to have it snaked properly. Drano - is designed for small P-trap clogs - and is worthless for anything larger (and pretty much worthless for the small clogs too, IMHO).

I agree with Zster - skip the drano and get out the snake. You can buy a snake and DIY or hire this done.

Another thing to check is the main vent pipe. You quite probably have an obstruction which is giving you the soda straw effect. Put a straw in a coke, put your thumb on the top and remove it. The water will remain in it until you release your thumb (obstruction) and equalize the air pressure. IF you feel comfortable doing it, take a garden hose on the roof and chug the vent pipe until the obstruction is eliminated. You would be surprised what squirrels put in pipes.