Building a new home doesn't offer the same convenience as buying an existing house. Not only do you have to find the land, which may not be in an existing neighborhood, you also have to factor in the time to find an architect or builder, and choose every element of the new structure.
such as whether the land gives you access to municipal water and sewage, or requires a well and septic system, along with any environmental and other permits.
The big advantage is you are much more likely to get exactly what you want. For many, this factor alone is enough to choose to build over buying. Still, there are other advantages, too, like the ability to create a more efficient home that meets new energy codes and standards for heating, ventilation, and cooling, plus insulation, and air filtration. Better efficiency is good for the environment and can save you money on your utility bills each month.