One of the fundamental reasons for collecting properties in Upland is to complete unique and interesting property collections. Completing collections allows you to collect that collection as an achievement, earns you a one-time UPX bonus (dependent on rarity), and boosts your property earnings while the properties are in that collection.
There are several rarities of properties in Upland which are determined by their popularity, influence, and historical value. Each city is carefully researched to understand the most prominent areas of the city and what makes them special. After collecting the necessary data, the Upland team designs what areas of the city become collections. They are sorted into five categories:
Leveraging the Yield Boost is one of the most valuable strategies in Upland, as it can substantially increase your passive property earnings. For example, if you have a property that's worth 100,000 UPX, it will generate you 17,300 UPX (17.3%) annually with no collection status. However, if it's placed in a collection that boosts your yield by 2x, you'll now earn 34,600 UPX annually; so long as it stays in that collection.
While some properties can be included in multiple collections, you can only leave them in one collection at a time. You'll have to do your research to ensure you're maximizing your property earnings at all times.