Mosinee ranch with a 2-car attached garage for sale! 308 Willow St, Mosinee, WI 54455 is a 3-bedroom, 1-bath ranch built in 1967 with 1,610 total sq ft (987 main level + 623 finished lower level) on a 0.28-acre lot. All bedrooms are on the main level, including a 14×15 primary bedroom, plus a 12×23 living room with a large picture window, eat-in kitchen and small den. The partially finished lower level has an 11×18 rec room with a pool table, plus laundry. Roof replaced in 2020; newer furnace and central air. Mosinee School District. Get your dream bathroom for FREE as seller is willing to offer a credit to redo the bathroom.