Kitchen design apps??

I don't want to cause you any extra work....but....we will be losing my porch to get this extra space. When we go for dog walks our wellies get left in the porch. That will now be the kitchen

So I was thinking the cupboard/bookcase to the right of the fridge could be just a box with a lid on it to hide our boots and when the lid goes down we can use it for sticking a bag on or sitting on to take boots off?? Is that wide enough.

Depends on size of your bottom.