Here is Basement 2. Most of it is taken up by the mansion's sewer system, including a branch that comes from beneath the barn. There are shadows from the shafts above where waste is deposited into the sewers. Waste flows to the southern-most part of the line, where a chute connects the mansion's sewers to the municipal sewers. There are also two shafts here to connect the wells (one in the barn) to the water table below.

The secret stairs from the wine cellar connect to a small area here, with more stairs continuing even further below.

Here's a zoomed-in look at the chute that also shows a closer look at the effluent (with sheet effects copied in from Sinister Sewers).

Here is the first level of the basement. Like the church mapped earlier in this thread, the upper quarter of this level is actually above ground, allowing for windows near the ceiling to allow in daylight.

This floor is primarily used by the servants. It has two stoves for cooking and a furnace used for heating water, a washing area for scrubbing dishes and doing laundry, two bathtubs and two toilets, a staff dining area, a wine cellar, and sleeping accommodations for the servants. Those include three private rooms (two of them barely more than closets) and a shared room with four beds. There are two additional servants' rooms in the attack, and a few more (unmapped) in the barn. Most of the walls on this level (except for the wine cellar) are lined with wooden paneling to make it a little cozier that the stone walls of the outcrop the mansion is built upon.

The servants' spiral staircase goes down one more level to a Basement 2 area mostly used to provide access to maintain the pipes used to carry the runoff to the sewers. A secret room off of the wine cellar leads to stairs that descends to a separate, disconnected part of Basement 2.

Top story of the tower. On to the wine cellar (and the rest of the basement).

Ooops, I posted an older version of floor three. Here's the correct one.

Here's level 4 of the mansion. There were only supposed to be three floors of the main mansion plus the tower, but when I was halfway through the third floor, I noticed that the main mansion has a central section that rises above the others. I decided to make that more of a rough attic storage space with a few rough servants' rooms. The tower doesn't connect here, but you can see it has been turned into a wizard's workshop. It extends up one more flight.

And I just noticed that I never posted the third floor.

Third Floor

Fourth Floor