12,300 Sq. Ft Retail Center in the River Prairie Development in Altoona, WI... Base rent is $19.50 PSF with CAM and Taxes of approx.. $5.50 PSF... Altoona, WI. is the fastest growing city in the State of WI. This mix use development offers 45,000 Sq. Ft. of retail, 140,000 Sq. Ft. of medical, 200,000 Sq. Ft Woodmans Grocery store, apartments, restaurants, etc.