Remember that the subject is never part of a prepositional phrase. The subject of a verb will never be part of a prepositional phrase. A prepositional phrase begins with a preposition [in, on, at, between, among, etc.] and ends with a noun, pronoun, or gerund.
Jumbo loan limits in California range from $417,000 to over $600,000. The median value of a home in California is more than double the median values of homes for United States as a whole, even though the median income is only slightly higher.
So in the San Diego area, for example, a jumbo loan would be one that exceeds the single-family loan limit of $612,950. In Los Angeles County, the threshold begins just north of $636,150, and so on. Use the link provided above to find the 2017 conforming limits for all counties in California.