Plottage

You get an inside tip that a group of developers are about to start work on a set of bombed out neighborhoods near downtown. You start buying property in the area, hoping to flip the real estate once all the development begins.

You start with one plot of land. Then you approach your new neighbors, buying a couple other plots. You keep going, adding property as fast as possible. Each time you buy an adjacent bit of property, you add it to a larger parcel. The process of joining the plots together is called assemblage. You are combining little bits to form a bigger bit. Assembling them, as it were.

As you do that, you increase the value of your growing parcel of land. If you have a larger parcel of land worth $5 million, and add another plot worth $250,000...now your total (even larger) parcel is worth $5.25 million. That increase in value is known as plottage.

The price of the land isn't going up yet. You are adding value (as in: the dollar amount you could sell your land for) by making it larger.