The Montana Supreme Court issued a unanimous ruling this week upholding the state\u2019s 2023 housing reform package, preserving a suite of zoning changes intended to increase housing supply.<\/p>\n
The decision resolves a legal challenge brought by a homeowner-led group against several measures that loosen single-family zoning rules and require local code updates \u2013 reforms that supporters have branded the \u201cMontana Miracle.\u201d<\/p>\n
\u201cBy upholding the constitutionality of our reforms, it will help bring the American Dream into greater reach for Montanans across our state,\u201d Gov. Greg Gianforte said in a statement.<\/p>\n
Lawmakers approved the package in 2023 as Montana communities faced rising home prices and rent growth tied to rapid population gains. Key provisions include:<\/p>\n
Duplexes:<\/strong>\u00a0Cities with\u00a05,000 or more residents\u00a0must allow duplexes on any lot zoned for single-family housing.<\/p>\n Accessory dwelling units:<\/strong>\u00a0The reforms expand where property owners can build ADUs and limit local design restrictions.<\/p>\n Multifamily in commercial areas:<\/strong>\u00a0Cities with\u00a0more than 7,000 residents\u00a0must allow multifamily housing in most commercially zoned areas.<\/p>\n State-directed planning updates:<\/strong>\u00a0A fourth bill, the\u00a0Montana Land Use Planning Act (MLUPA),<\/strong>\u00a0requires larger municipalities to update zoning codes and select from state-prescribed options to meet projected housing needs.<\/p>\n MLUPA also included limits on public participation in zoning decisions \u2013 a provision aimed at reducing the influence of \u201cnot in my backyard\u201d opposition in local entitlement processes. That element became a central issue in the lawsuits.<\/p>\n Supporters of the reforms said the laws are designed to unwind exclusionary zoning and speed construction of smaller-scale multifamily and entry-level housing in fast-growing markets such as Bozeman, Missoula and Billings.<\/p>\n While state pre-emption of zoning typically draws resistance from cities, the\u00a0Montana League of Cities and Towns<\/strong>\u00a0helped draft the legislation and later defended it in court.<\/p>\n A group called\u00a0Montanans Against Irresponsible Densification<\/strong>\u00a0filed suit soon after the bills passed, targeting the duplex, ADU and MLUPA measures.<\/p>\n The group initially won a preliminary injunction in district court blocking the duplex and ADU laws. The Montana Supreme Court later reversed the injunction and sent the case back to the lower court.<\/p>\n The district court ultimately ruled in favor of the pro-housing bills but struck down MLUPA\u2019s original public participation provisions.<\/p>\n Housing advocacy group\u00a0Shelter WF<\/strong>, which joined the case on the state\u2019s side, appealed the public participation decision alongside the League of Cities and Towns.<\/p>\n In 2025, lawmakers passed a bill revising the public participation language to address the district court\u2019s concerns. Because the statute changed, the Supreme Court ruled that the group\u2019s claims related to MLUPA\u2019s public participation provisions are now moot and should be vacated.<\/p>\n For builders and developers working in Montana\u2019s growth markets, the ruling reduces legal uncertainty around a set of zoning rules that can materially expand a project pipeline \u2014 particularly smaller-scale infill.<\/p>\n More by-right density on \u201csingle-family\u201d land:<\/strong>\u00a0The duplex requirement opens up additional lot-level yield in cities with 5,000-plus residents. That can improve residual land values on well-located parcels and make small-footprint product pencil in neighborhoods that previously allowed only one unit.<\/p>\n ADUs become a repeatable infill product:<\/strong>\u00a0With broader ADU permissions and fewer design constraints, builders can standardize ADU plans, create predictable scopes and timelines, and partner with homeowners or investors on \u201cone lot, two (or more) revenue streams\u201d strategies.<\/p>\n Commercial-to-residential conversions and mixed-use get a tailwind:<\/strong>\u00a0The multifamily-in-commercial-zones mandate in cities above 7,000 residents makes it easier to pursue apartments over retail, small mixed-use and workforce housing near job centers \u2014 with fewer discretionary zoning fights.<\/p>\n Local code updates are no longer optional:<\/strong>\u00a0MLUPA\u2019s planning mandates (and the court\u2019s action that clears the legal overhang) increase the odds that municipalities follow through on zoning code updates that accommodate projected housing needs. For builders, that should mean more consistent rules across jurisdictions and fewer one-off negotiations.<\/p>\n Entitlement risk shifts, not disappears:<\/strong>\u00a0Even with state pre-emption, projects will still face site-specific constraints \u2014 infrastructure capacity, design review (where allowed), building permits and neighborhood opposition in other forums. But the decision limits a key choke point: local zoning that categorically blocks missing-middle product.<\/p>\n Bottom line:<\/strong>\u00a0The court\u2019s ruling locks in a more permissive baseline for duplexes, ADUs and multifamily in many Montana cities, supporting faster infill starts and a broader set of feasible deal types \u2014 especially for builders focused on entry-level and workforce housing.<\/p>","protected":false},"excerpt":{"rendered":" The Montana Supreme Court issued a unanimous ruling this week upholding the state\u2019s 2023 housing reform package, preserving a suite of zoning changes intended to increase housing supply. The decision resolves a legal challenge brought by a homeowner-led group against several measures that loosen single-family zoning rules and require local code updates \u2013 reforms that…<\/p>\n","protected":false},"author":0,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"inline_featured_image":false},"categories":[1],"tags":[],"_links":{"self":[{"href":"https:\/\/mk.gen.tr\/en\/wp-json\/wp\/v2\/posts\/47599"}],"collection":[{"href":"https:\/\/mk.gen.tr\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/mk.gen.tr\/en\/wp-json\/wp\/v2\/types\/post"}],"replies":[{"embeddable":true,"href":"https:\/\/mk.gen.tr\/en\/wp-json\/wp\/v2\/comments?post=47599"}],"version-history":[{"count":0,"href":"https:\/\/mk.gen.tr\/en\/wp-json\/wp\/v2\/posts\/47599\/revisions"}],"wp:attachment":[{"href":"https:\/\/mk.gen.tr\/en\/wp-json\/wp\/v2\/media?parent=47599"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mk.gen.tr\/en\/wp-json\/wp\/v2\/categories?post=47599"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mk.gen.tr\/en\/wp-json\/wp\/v2\/tags?post=47599"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}Local governments backed the reforms<\/h2>\n
Legal challenge and outcome<\/h2>\n
What it means for builders<\/h2>\n