Standard Modular Buildings, Customized modular office and work spaces, Wheeled and skidded modular builings, Office Trailers BOXX Modular is a wholly owned subsidiary of Black Diamond Group Limited and is a supplier of quality modular buildings and construction trailers. BOXX Modular solutions bring comfort and convenience to workers in real-life, rugged conditions, whether its an urban construction site, or miles from nowhere. Our large and growing fleet includes offices, lunchrooms, lavatories, portable storage, multi-unit complexes and other flexible solutions we can customize to meet your needs. For your convenience, we also rent ancillary items like furniture and office equipment. Our experienced team handles site coordination, delivery and installation.