Legal Question in Consumer Law in North Carolina

Read the agreement. Does it say anything about impprovements to the real property? In a tenancy situation in the standard NC leases, any improvements generally belong to the landlord.

You can try and sue based on unjust enrichment for the value of the garage, but whether such action will succeed depends on the agreement. You should not have put the garage on the property unless you first had something in writing requiring the owner to reimburse you.

Can the garage be disassembled at all? I know it can be destroyed, but it would be different if it was just some kind of overhang over cars - you might be able to take something like that down. If its a brick fixture, then you can't.