When you are buying a flat from a builder in a building under construction, you have to check the following things:

• Approved plan of the building along with the number of floors.
• Whether the floor that you are buying is approved.
• Whether the land on which the builder is building is his or he has undertaken an agreement with a landlord. If so, check the title of the land ownership with the help of an advocate.
• The building byelaws as applicable in that area and ensure that the builder is building without any violation of front setback, side setbacks, height, etc.
• Check if the specifications given in the agreement to sell of the sale brochure match on the ground or not?
• Whether urban land ceiling NOC (if applicable) has been obtained or not.
• NOC from water, electricity and lift authorities has been obtained.