UN-HABITAT has calculated that one-sixth of humanity1 billion peoplecurrently live in slums. In the next 30 years, this figure could rise to over 31 percent of the world's population. The vast majority of these households will never be able to afford, nor have access to, formal mortgage finance. Thus, increasing the availability of microfinance for housing (MFH) to help provide adequate shelter and sanitation will become increasingly important.