Nassau residents whose homes were seriously damaged by superstorm Sandy should ask the county to reduce their assessment by the end of this month in order to get their property taxes reduced next year, Democratic legislators announced Wednesday.

Legis. David Denenberg (D-Merrick) and Carrié Solages (D-Elmont) said state and county law calls for the assessor to correct values if buildings are fully or partially destroyed before the tax roll becomes final.

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In Nassau, the tentative tax roll issued this past Jan. 2 becomes final on April 1, 2013. Its values will be used to calculate school tax bills that go out in October 2013 and general tax bills that are mailed in January 2014.

Denenberg and Solages urged residents to mail requests for re-evaluations to the Nassau County Department of Assessment, 240 Old Country Rd., Mineola, NY 11501, or call the assessor at 516-571-1000, -2008, -2003, -2002, or -2016.

Acting Assessor James Davis said in a statement that his office is working with nearly 400 homeowners who contacted the county and that the department continues to reach out to affected homeowners.

Davis, who has said he can make corrections to the roll until the tax bills go out, added that a portion of the tentative assessment disclosure notice that will be mailed to all property owners in January will be devoted to superstorm Sandy and the property inspection process.

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"Clearly, there will be significant reductions of assessed value to those properties that were determined to be severely affected by the storm. The adjusted values will be reflected in the final assessment roll and 2013-14 tax bills," Davis said.