Unity Enterprise Holdings Limited, and investment holding company, operates as a contractor of repair, maintenance, alteration, and addition (RMAA) works in Hong Kong. The company undertakes repair and maintenance services, including the upkeep, restoration, and improvement of existing buildings and facilities comprising the services of re-roofing, external and internal walls refurbishment, floor screeding and retiling, spalling repair, scaffolding, repairing and replacement of windows and doors, plastering, painting, improvement of fire services systems, and plumbing and drainage works. It also provides ancillary services consists of alteration and additional works of building layout and structural works, design of new structural works and checking of structural adequacy of existing constructions, and interior decoration works to the existing premises. The company was founded in 1999 and is headquartered in Kwun Tong, Hong Kong.