The idea of pre-construction investments when it comes to real estate is actually quite a clever way in which many have made millions. The theory is simple really. Invest in a property before when it is in the planning stage. Those who will be building these buildings need money and investors in order to do get the building off the ground. By investing (in many cases basically purchasing options to purchase) in the units, typically condo units in high demand areas, before the ground is broken investors often have the option of investing for pennies on the expected dollar once the building is complete and can re-sell the property at full market value once the building is complete pocketing the difference in the original investment and the asking price.