Welcome to Workshop and many thanks for joining in the discussion. We have loads of clever and creative members so I'm sure we can assist you.
I would encourage you to share a few photos of the area in which you would like to build the storage extension so members can see what you are working with and provide more specific advice and helpful for you.
Let me also tag some members who have come up with great storage solutions in the past to see if they might like to kick off the discussion for you, including @Tara86, @Malcolm, @Yorky88, @Seaton and @Brad.
Thanks again for joining us. Please don't hesitate to post anytime you need a hand with a project around the house and garden.