Here's the main duct, covered now in insulation. Not shown and to the right, the duct starts at the furnace, in the garage. Ground floor registers are in the ceiling. Upstairs, the air will come out of the cabinet 'kick' or the floor. The duct will be enclosed in the same cabinet material.
Here's the electrical sub-panel, with all the circuit breakers. Power comes from outside PG&E lines overhead, to the main panel with the meter, and then to this sub-panel. From here, wires to to all the lights and power in ever room. Different color wires carry different amounts of power. Orange, for example is 30 amps, going to the electric clothes dryer & oven.
Let there be light! We tested the lights, to make sure everything works. This picture is of the recessed cans downstairs. They're halogen, uninteresting, and pretty much as cheap as you can get. At least they line up.
This plumbing picture is taken from the garage. All the waste lines come to a point before going into the ground and into the main at the street. All these pipes come from the kitchen and bathroom upstairs.
Plumbing waste lines not only go into the ground, but need to be 'vented' to the roof. Vents provide relief of sewer gases and prevent these gases from entering the building. With exceptions, every plumbing fixture must have a vent. In our second floor, only one wall extends to the roof. All the other walls are partial height and stop at 8' above the ground. So to hide all the pipes, they needed to come to this one full height wall, and vented to the roof. Also in this wall are bathroom exhaust fan vents (in silver) and a flue from the furnace (black plastic).
Lastly, here's the kitchen sink plumbing. Since it's on an island, there's no place for a regular vent, discussed above. So the piping has to be configured in what's called a 'loop vent'. It loops around and connects with another pipe, eventually going to the roof. In the picture, it's the larger copper pipe, forming an upside down 'V'. The 4 smaller copper pipes are the water supply, hot and cold, for both the dishwasher and kitchen sink. A required 'clean-out' is below and behind the blue hose.