O'Connor & Associates

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About Oâ??Connor & Associates Oâ??Connor is the largest property tax consulting firm in the United States. Oâ??Connorâ??s team of professionals possess the resources and unparalleled market expertise in the areas of property tax, cost segregation, and commercial and residential real estate appraisals. The firm was founded in 1974 and employs more than 550 professionals worldwide.