If you are considering buying a flat on Sinhagad Road specifically as an investment, I would evaluate these 5 factors before deciding:
Location within Sinhagad Road some pockets have significantly better connectivity and future potential.
Price per sq. ft. compare the project with nearby projects, not just the builder's quoted price.
Rental demand proximity to IT/education hubs and transport can support rental income.
Infrastructure projects upcoming road, metro/public-transport and civic improvements can affect appreciation.
Builder & project quality approvals, construction quality, possession track record and maintenance are important.