Premium Upgrades are brand new yield multiplying upgrades for your property. Rather than being purchased with resources in the ecosystem, premium upgrades are individual NFT items that can be minted from the marketplace.
Premium upgrades are available on the marketplace for LAND and each add a x1.1 multiplier to your total yields. After minting the upgrade, you can install it on any property of your choice.
Please note that while premium upgrades cannot be resold individually, properties that have premium upgrades will retain them when sold.