SAN JOSE — A small commercial building at a high-profile spot on the edge of downtown San Jose has flopped into a loan default, a grim reminder of the widespread nature of the Bay Area real estate downturn.

The building whose loan is in default is at 478 East Santa Clara Street next to South 11th Street, according to documents on file at the Santa Clara County Recorder’s Office.

The loan delinquency is just one of a growing number of problems that have beset the Bay Area’s commercial property markets.

A wide range of problems have jolted the office, retail and hotel sectors in downtown San Jose, downtown Oakland, and San Francisco.

Empty office spaces, slumping rents, sky-high office vacancies, and a meltdown in real estate values have coalesced into a worsening commercial property market in the Bay Area.

An affiliate operating as Santa Clara Plaza 478 is in default on the loan, county real estate records show.

John W. Nguyen, based at 426 South Main Street in Milpitas, heads up the affiliate that defaulted on the loan, according to filings with the state of California.

The loan amount that is delinquent totals $1.2 million, according to the county real estate files.

The two-story building involved in the loan default totals about 8,100 square feet, according to multiple commercial property databases.

An insurance office, dental office and a used-truck office are listed as tenants in the building, according to Google Maps.