You can buy flats in Chennai in various types, including 1 BHK, 2 BHK, 3 BHK, and luxury 4-5 BHK apartments. Options range from affordable units in suburbs like Tambaram to premium flats in areas like Besant Nagar. Resale, ready-to-move, and under-construction flats are available, catering to different budgets. Villas and studio apartments are also options. Choosing the right type to buy flats in Chennai depends on your family size, investment goals, and lifestyle preferences.