In the previous chapter, we talked about preparing for construction. We covered the steps that happen after permits are issued but before building begins, including site preparation, material planning, and contractor coordination.

Once construction starts, many homeowners ask the same question:

How long does it actually take to build an ADU?

While every project is different, most ADU builds follow a fairly predictable sequence of construction stages.

Understanding this timeline can help homeowners know what to expect as the project progresses.

In this chapter, we’ll walk through the major phases of ADU construction and explain how a typical project unfolds.

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