Which is the right way of calculating UDS?

Question: I live in an apartment complex at Kovilambakkam, Chennai. In 2005, when I went for legal opinion to buy my flat, it was found that during the earlier stages of construction agreement by the builder, the total plot area was divided by 24 units from the total sq.ft. Citing the higher UDS that 1BHK owners have, while discussing demolishing the building and building a new one, 1BHK owners insisted that they needed a 2BHK! Kurinji Selvan Answer: The correct way of calculating the undivided share of land would be reckoning the built up area of the apartment vis-à-vis the total built up area of the entire complex. Normally, while going for redevelopment of the existing buildings, the ratio of land ownership of the existing owners would be taken into consideration for allotment of new apartments.