Builders Patch | 1,061 followers on LinkedIn. Finance software for multifamily housing: deal management, underwriting, due diligence, analytics, and more | There is an urgent need to finance 20 million new units of affordable housing in the United States, this decade. Historic data indicates that without significant disruption of the financing and construction industry, we will fall woefully short. Currently the process to underwrite and finance new multifamily housing loans is incredibly archaic, fragmented and lacks industry standard tools and digital innovation.