Landmark Federal Housing Bill Passes Senate, Sparking Industry Debate Over Build-to-Rent Rules

he Senate's landmark housing bill aims to fix the 7.1M home shortage by easing zoning and boosting financing, despite industry backlash over new build-to-rent (BTR) rules.

By: AXL Media

Published: Mar 21, 2026, 7:24 AM EDT

Source: Bisnow

Expanding the Capital Stack for Affordable Housing

A cornerstone of the bill is the adjustment of the public welfare investment cap, raising the limit for financial institutions from 15% to 20% of their risk-adjusted capital. This 5% increase is expected to unlock billions in liquidity from major banks, funneled directly into Low-Income Housing Tax Credit (LIHTC) projects and New Market Tax Credits. Additionally, the act modernizes FHA loan programs to support smaller mortgages (under $100K) and, for the first time, allows FHA financing to be used for the construction of Accessory Dwelling Units (ADUs), providing homeowners with new tools to densify existing residential lots.

Zoning Reform and HUD "Pattern Books"

To tackle the localized "red tape" that often stalls development, the bill introduces "carrots" in the form of increased Community Development Block Grants (CDBG) for municipalities that successfully ease zoning and permitting restrictions. A particularly innovative feature is the mandate for HUD to compile a national pattern book of pre-approved housing designs. By utilizing these standardized architectural plans, developers can theoretically bypass lengthy local design review processes, significantly reducing the "soft costs" and timelines associated with getting shovels in the ground.

The Build-to-Rent (BTR) Stumbling Block

The most contentious element of the Senate bill is the restriction on institutional investment in single-family rentals. The rule requiring developers to divest BTR units within seven years is a major departure from the House version of the bill. Industry groups, including the National Multifamily Housing Council, argue this "exit mandate" makes long-term institutional underwriting impossible. While the White House supports these rules to prevent "corporate consolidation" of neighborhoods, lobbyists are currently pressuring the House-Senate conference committee to strike the language before the bill reaches President Trump’s desk.