Small Business Disaster Reform Act of 2013 - Amends the Small Business Act with respect to obtaining the best available collateral for a disaster loan of not more than $200,000 relating to damage to or destruction of the property of, or economic injury to, a small business concern. Prohibits the Administrator of the Small Business Administration (SBA), in obtaining such collateral, from requiring the small business owner to use the owner's primary residence as collateral if the owner has other assets with a value equal to or greater than the loan amount that could be used as collateral for the loan.

Allows the Administrator to authorize a Small Business Development Center (SBDC) to provide assistance to small businesses outside the state of that SBDC, without regard to geographical proximity, if the small business is in an area for which the President has declared a major disaster.

Expresses the sense of Congress that the Administrator shall ensure that a SBDC is appropriately reimbursed for any legitimate expenses in carrying out such assistance.