The State Board of Equalization recently made the ruling, said Terry Flinn, special assistant to the assessor. Oracle bought Sun Microsystems for $7.4 billion in January.
Reassessment of the campus, now assessed at $355.4 million, could boost or decrease property tax revenues for Menlo Park.
However, any increase wouldn't replenish the city's general fund. Mayor Rich Cline said that since the campus lies within redevelopment agency boundaries, any increased property tax would funnel back into redevelopment projects — and not the general fund.
Mr. Flinn said that due to the property's size and complexity, the appraisers may not finish the reassessment before June 2011.
"Commercial properties are pretty distressed these days," Mr. Flinn said, agreeing that the recession has eaten away at the property's value during the past two to three years.
The sprawling 2.5-million-square-foot campus joins a list of approximately 13,000 properties in the county being reassessed, Mr. Flinn said.
Oracle declined to comment.
"In downtimes we get more decline in value requests. It's more complicated when the market's down. Taxes are one of highest operating costs owners have besides mortgage, so they start taking a closer look," Mr. Flinn explained.
The previous owner, Sun Micro, was one of Menlo Park's top sales tax revenue producers.