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Bill Summary · LC 1018

Legislative bill overview

LC 1018 proposes revisions to Montana's zoning laws to modify regulations governing accessory dwelling units (ADUs)—secondary residential units on single-family properties. The bill did not advance past the drafting stage before the legislative session ended, with the draft dying in process on May 23, 2025.

Why is this important

ADU zoning reforms directly affect housing supply and affordability in Montana communities by potentially allowing property owners to add rental units on existing lots. This impacts local housing markets, property values, neighborhood character, and residents' ability to age in place or generate rental income. The outcome shapes whether cities can address housing shortages through incremental density.

Potential points of contention

  • Local control vs. state mandate: Whether state-level zoning changes should override local municipal zoning authority and community preferences
  • Neighborhood impact concerns: Disputes over parking, traffic, infrastructure capacity, and whether ADUs change neighborhood character in established residential areas
  • Affordability guarantees: Whether the bill includes protections ensuring ADUs remain affordable or if market forces alone determine pricing

Compiled from official sources — confirm details with the bill’s official record.

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