The Greater Noida Industrial Development Authority has issued a notice on April 11, 2016 to the realty firm in this regard.
Supertech claimed however that all the 1,853 units which are developed or being developed at the 20-acre housing project 'Czar' in Greater Noida are not unauthorised and are "completely safe and legal".
This is the second time that Supertech has faced such crisis. In April 2014, the Allahabad High Court had ordered demolition of the company's two 40-storey towers in a Noida housing project. Supertech has challenged the order in the apex court.
GNIDA warned Supertech of action if the firm failed to seal the extra units in 30 days.
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In reply to the notice, Supertech has said that: "As far as the additional units constructed over the said plot, it is submitted that the company vide its letter dated December 23, 2014...Has applied for purchasable FAR along with request for increase in population density on the plot and has submitted the revised building plan to accommodate all 1,853 units constructed/under construction."
The excess units are well within the permissible limit and fully covered under a notification issued by the UP government on April 4, 2016, Supertech said in its reply.
"Now the company is ready to pay the cost of additional units over and above the 844 units which is permissible as per aforesaid notification of government of Uttar Pradesh," the company said in its reply.
When contacted, Superetch Chairman R K Arora said: "We had applied to purchase additional FAR (floor-area ratio) in 2014 and also submitted revised building plans."
"Hence there is no unapproved/unauthorised construction of flats undertaken by the company and any requirement of sealing of flats under construction," he said.
Arora expected the matter to be resolved shortly and said there was no need for buyers to "panic".