Construction of a four-story office building in downtown Edwardsville is expected to begin early next month.

Highland-based Plocher Construction, a partner in the development group, North Main Street Plaza LLC, and will build and manage the $6 million, 30,800-square-foot structure.The building will be in the 100 block of North Main Street, near the Madison County Courthouse and Administration buildings. It will replace existing buildings at 130 North Main Street, between Erato on Main, a wine bar-restaurant, and Big Daddy's Patio Bar & Grill. The project will include a walkway from Main Street to parking lots at the rear of the building. New construction will also make it possible for Erato to add an outdoor dining area. The exterior design will resemble the century-old Wildey Theatre located down the street.