Many informal settlements arose in Phnom Penh following the end of the Khmer Rouge periodand particularly with the return of refugees in the early 1990s, following the Pairs Peace Accords.Land in central Phnom Penh has become subsequently become increasingly valuable with theliberalization of the land market and the economic development of the Cambodia as a whole. This study deals with 6 case studies: National Pediatric Hospital, the Antenna, Koh Pich, DeyKrahorm, Sombok Chab and Borei Keila.