20 First Ave W, Marsing, Idaho is a proposed build-to-suit office development located in downtown Marsing. The project is planned as a customizable office facility that can be configured as either a single-story or two-story building, with the final layout, infrastructure, finishes, and amenities determined through the development process and tenant requirements. The site includes dedicated on-site parking and a flexible floor plan intended to accommodate a variety of operational needs. The property is positioned on a prominent corner location within the downtown area and provides access to surrounding communities via State Highway 55 and regional transportation routes. The development concept allows for customization of workspace configuration, technology infrastructure, interior finishes, employee amenities, and branding elements. Potential users may include professional office, financial services, business services, medical, wellness, corporate, and regional office operations, subject to project approvals and final design requirements.