http://www.lapalazzo.in/faq/technical.html UDI or “Undivided Interest” is a fraction of the total extent of the land on which the project is constructed, which is proportionate to the Saleable Built - up Area of the respective Apartment as against the total Saleable Built - up Area of all the apartments in the project. This is in effect a proportionate share of the land, which an apartment owner will own, in proportion to and together with his or her apartment. The Undivided Interest will be conveyed to customers along with the apartment, by way of a duly stamped and registered sale deed, after the completion of the project and once all amounts have been paid in full.