You need to approach a Housing Finance Company (HFC) with the latest salary slips and TDS form 16 of the last two financial years of yourself and your co-applicant, if any. The loan officer will then tell you the loan amount you are eligible for and the terms of the same.
You need to submit the application form along with the necessary documents. On receipt of the application form, the HFC reviews it, asks questions wherever necessary and convey its decision to the applicant. You are advised to visit more than one HFC since you are likely to get better terms/ larger loan amount.