If you live in the Belleville, IL area and are needing some extra space, youâre in luck! Gateway Storage Mall has fantastic storage options at low prices in the heart of Belleville, IL. Youâll find us at 2003 Mascoutah Ave near Martin Glass Company, Belleville Sportsplex, and The Silver Creek Saloon and Grill. Our clean, quality storage units are perfectly located to serve Belleville, Mascoutah, Shiloh, and the surrounding communities. Come see us!