$275,000 US-1 frontage in Stuart. A rare 1,307 sq ft commercial sliver on SE Federal Highway in Martin County, zoned IPUD (industrial) and directly adjoining established commercial and storage properties on a high-traffic, paved corridor. Not a buildable lot on its own; ideal as an assemblage or access parcel for a neighboring owner or investor looking to add highway frontage. B26079503 MLS US-1 frontage in Stuart. A rare 1,307 sq ft commercial sliver on SE Federal Highway in Martin County, zoned IPUD (industrial) and directly adjoining established commercial and storage properties on a high-traffic, paved corridor. Not a buildable lot on its own; ideal as an assemblage or access parcel for a neighboring owner or investor looking to add highway frontage. SE FEDERAL, Stuart