See Inspector General of Registration & Commissioner of Stamps site.

For the sale of houses, plots

• Stamp Duty: 8% of market value of property - 8%
• Additional Stamp Duty Under 3B of the Stamp Act: 5% of stamp duty - 0.4%
• Additional Stamp Duty: 2% of market value of property (Payable to City Corporation. 3% if locatated within Taluk Panchayat) - 0.16%
• Registration Fee: 1% of market value of property - 1%
• Grand Total Stamp Duty Payable: 9.56%

For the sale of flats/apartments the stamp duty is based on the value of the property.

• Upto Rs 300,000: 2%
• Rs 300,000 - Rs 500,000: Rs 6,000 + 3% on amount over Rs 300,000
• Rs 500,000 - Rs 1,000,000 and above: Rs 12,000 + 6% on amount over Rs 500,000
• Rs 1,000,000 and above: Rs 42,000 + 8% on amount over Rs 1,000,000
• Additional Stamp Duty: 5% of stamp duty, 2% to city corporation, 2% registration fee