What are things to consider when purchasing a flat in Sector 90 Gurgaon?

[reeltor official]

I am about to purchase a flat and need to know what I should consider. What among the many things should I look at as part of exploring the Flats for Sale in Sector 90 Gurgaon? Is it the plan, construction, parking, maintenance, facilities near the property or what else? How much is the cost, and the paperwork? A visit to the site becomes inevitable