CR Construction Group Holdings Limited, an investment holding company, operates as a building contractor in Hong Kong, Mainland China, Malaysia, and the United Kingdom. It operates through two segments, Construction Operations and Environmental Operations. The company offers building construction services for residential, commercial, and industrial buildings; repair, maintenance, addition, and alteration work, such as general upkeep, maintenance, improvement, and refurbishment of existing facilities and components of buildings and their surroundings; and structural and engineering works comprising building, piling, demolition, site formation, and electrical and mechanical works. It also engages in construction, restoration, and operation of wastewater and recycled water treatment plants, water distribution plants, and other environmental facilities and infrastructure; sewage and reclaimed water treatment services; architectural services related to environmental improvement; and energy storage and new energy services.