The name says mansion, but the frames show four modest single storey houses of pale brick with dark hipped roofs and plain window openings, set around a walled yard. A tiled path runs between them past clipped hedges and a low stone planter in the middle, with patches of bare earth and grass to the sides. Glass towers with lit windows stand close behind the wall and the sky above them is dark violet, so the yard reads as a small block of low buildings dropped into a city at nightfall. One frame is shot from inside a house, looking out through the window openings at the neighbouring roof.

The map spans 1664 × 1536 × 448 map units and is built from 816 faces and 25 textures, three of them embedded, with the rest pulled from more than twenty stock WADs. The spawns are uneven, eleven for the counter-terrorists and ten for the terrorists, seating twenty-one players in all, and both teams have buy zones. There are no bomb sites, hostages or rescue zones. A single ambient sound entity is the only entity of note, and there is no water. The sky texture is city, and the archive ships the .bsp alone.