The Dallas Central Appraisal District said last week that Dallas County’s preliminary tax roll values will drop to $166 billion, a decline of 4.7% from $174 billion in 2009.

The final valuation total will not be determined until protests from property owners are resolved. The appraisal district said up to 60% of protests result in lower valuations.

The final certified tax roll in 2009 totaled $165 billion. The preliminary rolls do not include commercial property and business equipment valuations.

Ken Nolan, chief appraiser for the district, said more protests are expected this year because property owners can now file their disagreements online rather than in person.

Almost 73,000 property owners protested their valuations in 2009, up 50% from 2003.

Dallas County budget director Ryan Brown said the 4.7% drop is the largest decrease since at least 1991. He said he expects the certified roll to show a drop of at least 9%.

Brown said new construction in the county would be at its lowest level since 1996.

The district said 60% of the almost 400,000 residential properties reappraised will lose value, 20% will show an increase, and 20% will not change. In 2009, 55% of reappraised residential properties posted a drop in value.

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