White Plains Assessor’s office Return to Directory Description Information regarding property in the City of White Plains..Website http://www.cityofwhiteplains.com/index.aspx?NID=84Phone 914.422-1223Address 255 Main StCity White PlainsNY10601Categories All, Government November 6, 2017 5:18 pm | by Mariel, Adult LibrarianDirectory Categories: All and Government.