The Indian residential sector recorded an unprecedented year of growth with a record rise in sale by 51 per cent year-on-year (y-o-y), at 232,903 units, across the top eight cities of the country, according to a Knight Frank India report, titled India Real Estate: H2 2021, released on Tuesday. New home launches also saw a significant rise of 58 per cent on y-o-y basis with the addition of 232,382 units in 2021.