An image of the Help Reopen This Building message.
To get past this, you’re going to need to complete a few missions at Uncle Danny’s! He’s in the brown house beside Handy Mandy’s, across the street from your greenhouse. Tap on him, and you’ll see what he needs. If you completed a mission for Uncle Danny, and Granny’s House is still closed, then it means you haven’t completed enough missions yet and you’ll need to do a couple more!
An image of Uncle Danny's house.
But wait! My quest says to complete a deal with the Mayor’s Aide, and I can’t!
An image of the Mayor's Aide's deal line with no completable deals.
No worries, where there’s a will, there’s a way. If you’re stuck in this situation, you simply need to level up!
 
You can level up by completing deals with other characters, or in the Weed on Wheels building. Once you do that…
An image of the Mayor's Aide's deal line with new completable deals!
Boom! Look at all those deals again. Now you can complete the deal you need to, complete Uncle Danny’s quests, and get Grandma’s House re-open!
 
(Note: Even though Granny’s House is closed it doesn’t stop you from buying her products from the Global Market still, you can take advantage of that to complete some deals!)
 
Happy Growing!