This is a 100% Total Small Business Set-Aside solicitation for the conversion of an existing Visitor Center into a Headquarters building at the Assabet River National Wildlife Refuge in Sudbury, Massachusetts (680 Hudson Road). The project magnitude is between $1,000,000 and $5,000,000, and the period of performance is 365 calendar days after receipt of the Notice to Proceed. The contractor must provide all labor, materials, equipment, permits, and supervision as detailed in the contract documents, plans, and specifications. The government intends to award a Firm Fixed Price contract within 120 days from the solicitation closing date. Interested parties must register in SAM and monitor Contract Opportunities for the official solicitation documents and amendments.