That house is a small single storey building with only a ratio 33% internal floor space vs plot size
.Here is what $2m house looks like it good neighbourhood of Tokyo https://www.homes.co.jp/kodate/b-75250036569/ 2100 sqft (195.75m²) of internal floor space squeezed on to a plot that is only 960 sqft (89.26m²). That is 218% ratio.
Is that the typical building density in Silicon Valley? If so, then not surprising it is so expensive. In Tokyo that plot might get divided into 3 and three good size family homes built on it.
From the satellite view on Google Maps it would appear this building uses only a third of the land of its plot. So maybe plot is about 2550 sq ft.
