Looking for the Best Sector in Noida to Buy Flat. Noida has several well-developed sectors which are known for their planned infrastructure, wide roads, green landscapes, and network of metro lines. The best sectors in Noida comprise of well-known residential projects, social infrastructure, and potential for appreciation of investment in value. The proximity of Noida sectors to IT parks, schools, shopping malls, and healthcare centers offers a unique combination of convenience and investment potential in a flat in Noida.