Keystone Realtors Limited reported a 19% year-on-year decline in consolidated net profit to Rs 52.42 crore for the quarter ended March, primarily due to a sharp rise in operating expenses. In the same period last year, the company had posted a profit of Rs 64.80 crore. Despite the profit contraction, total income more than doubled to Rs 1,613.36 crore, compared to Rs 642.20 crore a year earlier, reflecting strong revenue expansion.