Based on the provided documentation, the content focuses exclusively on the foundation and structural requirements for ADU conversions in the Denver area. It does not provide information regarding specific plumbing or electrical upgrades.

While the guide details critical structural factors such as helical pier installation, concrete removal, egress window construction, and soil stabilization, it does not list requirements for utilities like pipes, wiring, or electrical panels.

For an ADU conversion, the provided text emphasizes the following structural preparations which must be addressed before or during the installation of other systems:

• Foundation Assessments: Licensed structural engineers must evaluate existing slabs to ensure they can support additional loads.
• Soil-Specific Engineering: Addressing Denver’s expansive clay soils using helical piers or screw piles.
• Code Compliance: Meeting Denver’s 36-inch frost depth mandate to prevent frost heave.
• Excavation Support: Using tiebacks if retaining walls are required during garage or basement excavations.

To determine the specific plumbing and electrical needs for your project, you would need to consult Denver’s local building codes or a mechanical/electrical contractor.