Nassau County announced that it will reassess the value of homes for the first time in a decade using new technology.

The county says the assessment program is changing after almost eight years of frozen assessment rates. The new model, County Assessor David Moog says, will take into account multiple factors including location and neighborhood, similar to ones used in communities across the U.S. He says the new model is more equitable with some taxes actually going down, but he admits some owners will see an increase.

Dan Oppenheimer of Hempstead Village says his tax rate is going up almost 70 percent, but comparable homes across the street aren't seeing nearly the increase.

Sea Cliff officials say the 1-square-mile North Shore community is also seeing enormous increases because of the new assessment model.

Moog says the assessment model in Nassau County will be adjusting every year going forward, learning from a variety of market factors so that assessments will remain fair.

The new assessments take effect in 2020.

Officials say residents can still grieve their taxes to possibly get a lower rate.