CA Educ Code Section 35277.5

For purposes of this article, an extreme shortage of affordable housing exists if any of the following conditions exist:

(a)

The vacancy rate for rental housing in the jurisdiction in which the new schoolsite is located is 5 percent or lower.

(b)

The median rent in the Zip Code where the new replacement housing is located is more than 30 percent of the median income of the households displaced by the school construction.

(c)

The occupancy rate for 10 percent or more of the dwelling units within the vicinity of the new schoolsite equals or exceeds 1.5 persons per room, excluding bathrooms, hallways, and porches.