All lenders and CDCs should be cognizant of the loan program requirements for the assumption, assignment, and sale of SBA loans. Another option to sell a business with an SBA loan is for the buyer to assume the loan.SBA loans are fully assumable with SBA approval. Assumption of Loan Requirement Letter for disaster loan servicing action request packages. About this document and download. What Is Required to Assume an SBA 504 Loan? A detailed guide combining insights from three sources to help you prepare the necessary documents for a successful SBA loan application. Our office provides help with SBA services including funding programs, counseling, federal contracting certifications, and disaster recovery. AssumeList is a unique real estate tool that allows prospective homebuyers, investors, and agents the ability to find homes for sale with an assumable mortgage. The 504 loan program provides longterm, fixed rate financing for major fixed assets that promote business growth and job creation.