When is it appropriate to seek outside help on a construction project?

In my experience, I only reach out for outside help if the problem is too complex for me to solve myself. For example, in one of my previous roles, we were building a new home that had a complicated design. The client wanted several unique features, which made it difficult to plan out the entire construction process. In these situations, I would call in an architect to help us create a blueprint so we could start building.