New Federal Law Aims to Broaden Housing Options

Why it matters locally: The '21st Century ROAD to Housing Act' is particularly relevant for Hawaii due to the state's ongoing housing affordability crisis and the potential for increased ADU development and broader access to manufactured housing financing to alleviate some pressure on the housing market.

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WASHINGTON – A new federal law, the '21st Century ROAD to Housing Act,' went into effect on June 10, 2026. Proponents state that the act represents a significant update to federal housing policy, particularly concerning financing for accessory dwelling units (ADUs) and manufactured housing. Advocacy group Casita Coalition reported its involvement in shaping the ADU financing provisions within the new law. The organization described the legislation as one of the most substantial federal housing reforms in decades. It states the law will create new opportunities to increase America's housing supply. The act introduces revised guidelines for a federal mortgage insurance program managed by the Federal Housing Administration (FHA). Lenders will now have the ability to bundle the value of an ADU with the primary residence when calculating loan-to-value ratios. This change aims to facilitate access to financing for homeowners constructing ADUs on their properties. Previously, FHA guidelines often excluded the value of an ADU from the appraisal for a home loan, which limited borrowing capacity for these projects. Additionally, the new law addresses manufactured housing. It revises regulations to allow for the inclusion of certain financing costs into the overall loan amount for these homes. This provision seeks to make manufactured housing more accessible by reducing upfront costs for buyers. The changes aim to streamline the process for securing loans for factory-built homes, which offer an alternative to traditional site-built construction. The legislation received bipartisan support in Congress before its passage. Lawmakers stated the reforms would help address housing availability challenges across the country. The act includes provisions intended to promote the development of more diverse housing types, aiming to provide solutions for various income levels.