When deciding which BHK gives a better return, understanding the difference between RK and BHK is key. An RK is a compact unit, while a 1 BHK size ranges around 500–700 sq. ft., and the standard size of 2 BHK flat is 800–1200 sq. ft. The difference between 1 BHK and 2 BHK lies in space, family appeal, and rental potential. For higher ROI, 2 BHK flats are better—they attract families, offer higher rent, and have stronger resale value compared to 1 BHK or RK units. Conclusion: Investing in a 2 BHK flat usually provides a better return than 1 BHK or RK, balancing affordability, space, and long-term gains.