Raising animals in Stardew Valley will require you to have the appropriate building for it, like the barn. Having a barn allows you to raise cows, which reliably provide milk, so long as you take care of them. But if you really want to maximize the value of your barn animals, you will want to upgrade the structure. Upgrading the barn unlocks new animals, increases the number of animals you can have, an auto-feed feature, and more. Here are the details on how to upgrade from the base barn to the Big Barn and Deluxe Barn.
Every barn upgrade
Base Barn
Before you can upgrade your barn, you will need to build the base version first. The barn can be built by purchasing it from the Carpenter and providing the necessary materials. The barn takes up a 7x4 space on your farm, which will not increase even when you upgrade the barn. It takes three days to build. The required materials are 6,000G, 350 wood, and 150 stone. The initial barn allows you to purchase cows from Marnie's Ranch for 1,500G each, and it can hold up to four animals.
Big Barn
The next version of the barn is the Big Barn. Upgrading to the Big Barn requires 12,000G, 450 wood, and 200 stone. Upgrading the barn only takes two days and it is still usable during this time. The Big Barn can hold up to eight animals and allows animals to get pregnant. It also unlocks goats, which can be purchased for 4,000G from Marnie's Ranch. Goats produce goat milk every two days.
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