lease agreement by lot, not address?

[Allen L.]

I have a property that sits on 2 regular sized lots for the area. I want to either sell off the southern lot or build on it, so when I sign a lease for the house on the 2 lots, I want the tenants to be aware of this and "rent" the northern lot (the entire structure is on the northern lot). Since these 2 lots are under 1 address, what's the best way to structure this into the lease? There are some sheds on the southern lot that I don't mind them using, but when I decide to sell/build on it those would go.