In article questions of formation of some legal laws in the ancient cities - Bukhara, Balkh, Samarkand are considered. These laws leaned on written sources and views to which various government dynasties adhered the IV-VII centuries. The big contribution to development of laws was made by al Mukhit al Burkhani and Ahmad Al Bukhari. Laws concerned fundamental questions of judicial system, rights of succession and sources of the income for social security in Muslim society. The author characterized positions and various points of view of participants of discussions - lawyers on matters of law of ownership of land, real estate and the rights of its donation. In article the contents of the summary legal land code consisting of 26 sections are opened, separate forms of ownership, belonging to mosques, madrasah, government and other organizations are considered. The author drew a conclusion that this collection of laws can be the historical source creating idea of bases of legal system in questions of landed and other property in the historical past.