Lap Kei Engineering (Holdings) Limited, an investment holding company, provides engineering services for building services systems in Hong Kong. It operates through Building Services Engineering Work; and Maintenance, Repair, and Other Services segments. The company offers a range of services for electrical systems, including design, testing, and commissioning for systems, such as main switch cubicles, sub-main switch distribution systems, final sub-circuit systems, and emergency generator and extra-low voltage installation systems for various residential, industrial, institutional, commercial, and data/computer center projects. It is also involved in the design, supply, installation, testing, commissioning, and project management of mechanical ventilation and air-conditioning systems, including seawater cooling plants, air-cooled refrigeration plants, VAV systems, and automatic controls systems for office buildings, commercial complexes, institutions, hotels, hospitals, and industrial and residential buildings, as well as plumbing and drainage systems for residential, industrial, and commercial projects. In addition, the company provides contracting services for various fire suppression and detection systems; and offers maintenance and repair services for building services systems and replacement of parts. It serves subcontractors, landlords, and property developers. The company was founded in 1997 and is headquartered in Kowloon Bay, Hong Kong.