Many first-time buyers focus only on the home model price. That number may not include the full project cost.
The worksheet prompts you to think about common extras, such as land clearing, grading, driveway work, septic or sewer, well or water tap, electric service, permit fees, surveys, engineering, and loan-related costs. It also helps you note whether your project is a main home or an ADU, because rules and utility work can differ.
It also reminds you to ask how the home is built and inspected. For example, modular homes are usually built to the IRC code used for site-built homes, while manufactured homes are built to the federal HUD code. If you are comparing options, our guides and costs pages can help you learn the terms.