The National Park Service is leasing Building 125, a historic 10,188-square-foot office/retail/flex space at 125 Baxter Road in Charlestown, Massachusetts, with an optional dock and patio. The lease term is anticipated to be 10 years, with a minimum fair market rent of $24 per square foot NNN ($244,512/year), and rent payment offsets are available for capital improvements like the needed roof replacement. The selected offeror will be responsible for all maintenance, repairs, utilities, and compliance with historic preservation and accessibility standards. Proposals are evaluated on compatibility with park values, historic preservation, financial and managerial capability, environmental enhancement, and proposed terms. The initial solicitation is open for a minimum of 60 days, with rolling one-week submission periods if no responsive proposal is received by the initial deadline.