You may want to buy a home or a lot but only if a certain design plan can be realized there. You might be so imaginative you’ll need an engineer. If you’re planning to build great engineering is indispensable to get the building permit for the project.
For questions like can I build a house on the side of this mountain? to Why does it cost so much to make this particular remodeling change? you may need to consult an engineer.
Find out more at the American Society of Civil Engineers website.