UDC- united development company is the sister concern of CDC-construction development company and their sponsor is Al fardan... so they are real big people. UDC is the main project holder of Pearl qatar..They are located in the alfardan building near the bank street. their working hours are from 7.30 am - 12.30 and again from 3.00 pm - 6.00 or 6.30 pm .. i am not sure about the timing sthough ..bu they are very good company