It posted a net profit of Rs 30.33 crore in the year-ago period, Unitech said in a statement.
However, net sales increased by 22 per cent to Rs 1,033.31 crore in the fourth quarter of last fiscal against Rs 848.25 crore in the corresponding period of previous year.
"Profit after tax from ordinary activities stood at Rs 42.69 crore (in Q4). During the quarter, the company made a provision of Rs 103.02 crore towards diminution in value of its investment in wireless business. Net loss for the quarter, therefore, was Rs 51.55 crore," Unitech said.
The company had written off a similar amount during the 2012-13 fiscal as well. The total investment of Unitech in the telecom business was about Rs 900 crore.
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For 2013-14 fiscal, Unitech net profit declined sharply to Rs 69.74 crore from Rs 209.56 crore in the previous year.
Total income from operations rose to Rs 2,933.31 crore during last fiscal from Rs 2,440.53 crore in 2012-13.
Unitech's consolidated net debt as of March 31, 2014 was Rs 6,316 crore. Net debt to equity ratio stood at 0.55.
Commenting on the results, Unitech Managing Director Sanjay Chandra said: "The year gone by has been a very challenging year for the real estate sector. While on the one hand, demand for housing was sluggish for most part of the year, on the other hand, construction and financing costs continued to rise".
"In this environment, company's focus was primarily on ensuring that the construction activity at its ongoing projects didn't suffer while managing a tight cash flow situation," he added.
"Going forward, company is gearing itself to benefit from the widely expected improvement in the economic environment by undertaking various initiatives aimed at balance sheet strengthening, enhancing project execution capacity and boosting sales capabilities. Speeding up delivery of finished product is our key priority for the coming year," he added.
Shares of Unitech closed 6 per cent up at Rs 27.95 apiece on the BSE.