Casa Verde Park 3161 San Juan Pl, Union City, CA94587 Casa Verde Park is a neighborhood park located between San Juan Place and Santa Rosa Way. The park has an open grassy…More field, which makes this a perfect spot for outdoor games like soccer, volleyball and kickball. There are also plenty of picnic tables and benches. Casa Verde has two basketball courts and three playgrounds (two located near San Juan Place and one by Santa Rosa Way). The park is open 6am-10pm. Pets allowed.