Modular homes San Diego can be confusing at first because there are many different names for them. They are labeled prefabricated, modular, prefab, and even incorrectly called manufactured homes San Diego. Putting names aside, what is a modular home Is it different from a traditionally built home Yes. There are quite a few differences between these two types of homes that are important for every prospective homeowner to know. Modular Homes San Diego and Manufactured Homes San Diego Modular homes San Diego or sometimes referred to as systembuilt homes are built in a controlled.