Partition of property

Mr X and his wife build 4 floors on a residential plot in delhi from their joint funds. The plot in question was alloted to the wife from a house building society for a meagre sumf Rs. 10,000. only way back in seventies.The total cost of building done jointly is Rs. 10 lakhs. The share in the property between husband and wife is 50:50 as filed for tax purposes over the years. The property is now freehold jointly. If husband wants a partiton of the property and its sale, how can he go about the  sale of the two Floors which amounts to his  50% share.Is it legally possible if wife refuses the partition and sale of the property. What is the recourse for the husband in this situation.?