There are many changes to the old HARP Program to the new HARP 2.0 (Homeowner Affordable Refinance Program). There is no loan to value limits. You can refinance no matter how far your home has fallen in value. The loan to value limits before were 125%. Some cases you may not need an appraisal and the underwriting is simple compared to standard refinances. The program was extended until December 31, 2013.