Mason City Iowa Medical Office 1420 4th St SE 5,336 SF Vacant Office Building Mason City, IA 50401 $1,500,000 ($281.11/SF)

Marcus & Millichap is pleased to present 1420 4th St SE, a well-maintained 5,336± square-foot single-story medical/behavioral health facility situated on 1.23 acres in the East Mason City submarket. Originally built in 1955 and fully renovated in 2017, the building features efficient floor plans, strong clinical infrastructure, and ample on-site parking. The layout supports a variety of medical, counseling, or specialty practices, making it a versatile healthcare investment with stable long-term demand drivers.
The property sits within Mason City’s established medical and service corridor, benefiting from immediate access to 4th Street SE and close proximity to U.S. Highway 18. The surrounding area includes a concentration of healthcare providers, pharmacies, government offices, and neighborhood retail—creating steady daytime population and referral traffic. The site is positioned roughly five minutes from MercyOne North Iowa Medical Center, the region’s dominant hospital system.
This asset offers investors stable in-place medical tenancy along with proven functionality for healthcare users, supported by its high-quality renovations. The building’s flexible configuration provides potential for incremental leasing, specialization by a new operator, or conversion to a higher-acuity medical user. Long-term upside is supported by Mason City’s healthcare employment base, the area’s aging demographics, and continued demand for outpatient care facilities.?
Mason City is a regional hub serving more than 50,000 residents within a 10-mile radius, with strong employment concentration in healthcare, education, and manufacturing. The East Mason City submarket benefits from stable population trends, improving median household income, and consistent demand for affordable, accessible medical services. The property sits in an area with a Walk Score of 66 and a growing professional services base, reinforcing long-term tenant demand.?