Ritta Company Limited was founded on 26th October 1987 with a registered capital of one million Baht and increased to five hundred fifty millionBaht on 21st January 2005.Ritta Company Limited is a congruent concentration of Thai engineers possessing knowledge, ability, concept, principle and practice providing real professional engineering services in design and construction. The collective track record is worth more thanfive hundred billion baht, e.g., large department store, condominium, building, house, road, airport, factory, power plant, hospital, etc., that are appreciated by local and foreign clients.Ritta is at the forefront of the construction industry in Thailand carrying out the work with professional care and just achieving Certification of quality management system (ISO9001) fromBureau Veritas (BV) under the accreditation of the National Accreditation Council of Thailand (NAC) and the United Kingdom Accreditation Service (UKAS).The head office is located at the inbound direction of motorway near the entrance to Suvarnabhumi Airport. The building received “Gold Certificate” under LEED (Leadership in Energy and Environmental Design) system by U.S.Green Building Council to be an energy efficient and environmental friendly building on 24th April 2011.