Karnataka Guarantee of Services to Citizens Act - 2011,also known as Sakala. Introduced on 1 March 2012, it aims at bringing transparency in administration. There are various services offered under Sakala, including obtaining a Khata for your house.
The Sakala website mentions the list of documents required for submitting your Khata registration application: Application in prescribed form Attested copy of the title deed Copy of Encumbrance Certificate (in form 15) for the past 10 years Conversion Certificate of the Land Conversion of the issued by the competent authority Survey sketch / Tippani copies Copies of the NOC from Town Planning Authority (BDA) for bifurcation of land (in case of land measurements less than the measurements in land conversion certificate).
Once submitted, contact the BBMP office after a few days to know the approval status. According to the Sakala website, it should take not more than 30 days. If the Khata application is approved, then you will be told to make two Demand Drafts – one for an amount which is 2% of the stamp duty you paid at the time of registration (this is the Khata registration fee) and another for Rs 125 (for Khata Certificate and Khata Extract). Get them made at any bank and submit them to the BBMP office. Then collect the Khata Certificate and Khata Extract in your name.
Thus you can enquire from your builder the status and can jump into action directly following the above instructions.