550 Mayer Street is a 9,000 SF industrial warehouse on a 27,966 SF lot in Collier Township, Allegheny County — directly adjacent to an active freight rail corridor and seconds from the Route 50/I-79 interchange in Bridgeville. Built in 1975 with a 2017 Duro-Last rubber roof, 220V/3-phase electric, hot water heating on natural gas, copper plumbing (water lines replaced 2019), public sewer and water, two roll-up overhead doors, two at-grade doors, and loading dock. Currently owner-occupied — the seller operates an authorized U-Haul dealership on-site and will vacate at closing, delivering the property free and clear of any occupancy obligations.