8.5x12TA Charcoal Enclosed Office Trailer – 2026 Rock Solid Cargo VIN: 74591 | IN STOCK | $20,900 Looking for an enclosed office trailer for sale with a professional interior, built-in workspace, storage, electrical package, and climate control? This 2026 Rock Solid Cargo 8.5x12TA Charcoal Office Trailer is in stock and ready for work. Built as a versatile mobile office trailer, jobsite office, contractor trailer, or enclosed workspace, this trailer features insulated Silver Frost walls and ceiling, RTP flooring, custom cabinets, work benches, a 50-amp electrical package, and a 15K BTU A/C with heat strip. Trailer Specifications Size: 8.5x12TA Brand: 2026 Rock Solid Cargo VIN: 74591 Price: $20,900 Exterior: .080 Charcoal Polycore Blackout Package 7’ Interior Height 60” TTT 3500lb Tandem Axles Mag Wheels Black Interior Trim Flat Front with Added Window Braced for Awning 78” Tall Side Door 48” Rear Ramp Door with Spring Assist Office Interior & Storage Insulated Silver Frost Walls & Ceiling RTP Floor & Ramp Custom Upper Cabinets Lighting Under Upper Cabinets Closet with Adjustable Shelves Base Cabinets Built-In Work Benches Toolbox Electrical & Climate Control 50-Amp Electrical Package with MB Plug (4) 48” 12V LED Lights Extra Electrical Receptacles 12V Battery & Charger 15K BTU A/C with Heat Strip Mobile Office Trailer for Sale This 8.5x12 enclosed office trailer offers a compact, professional workspace that can travel wherever the job takes you. The combination of built-in cabinetry, work benches, electrical service, insulation, heating, and air conditioning makes it a great option for contractors, construction crews, mobile businesses, jobsite operations, and customers needing a dedicated portable workspace. We ship nationwide, so you don't have to be local to purchase this office trailer. Contact Summit Cargo Trailers Text: 229-391-1186 Call Office: 229-396-4309 Email: Sales@SummitCargoTrailers.com Multiple purchase options available. Contact Summit Cargo Trailers today for availability, purchasing information, nationwide shipping, or a quote on a custom enclosed office trailer.