Portable Cabin with Sliding Windows has double stacking and linking ability allows for expandability in tight spaces and durable seam welded all steel construction. The Portable Cabin provides secure and comfortable working accommodations to project staff engaged in the delivery of fast track building solutions and are suitable for caravan park accommodation or backpacker units. The Portable Cabin has maintenance free internal finishes and good performance thermal efficiency. The Portable Cabin is designed with jack legs for leveling and maintenance free finishes and steel exterior doors and stone guards to windows externally for added security. The Portable Cabin has viny faced plaster board interior wall finish for contemporary workspace and have craneage points on roof. The Portable Cabin with Sliding Windows is easy to transport and install are designed with full security locking system and steel shutters to windows for added security.