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State Land Use Enacted Legislation

Bill # State Year Party Topic

HB 577

NH 2025 R Accessory dwelling units regulations, Allow ADUs where single-family homes are permitted, By-right zoning, Limit local requirements on ADU occupants, Minimum parking requirements

Provided by Furman

Summary

  • Expands accessory dwelling units by right to include detached units, adds definitions related to accessory dwelling units, and increases the maximum square footage.
    • Adds that accessory dwelling units may be constructed at the same time as the principal dwelling unit.
    • Defines accessory dwelling units as:
      • “Attached unit”: within or physically connected to the principal dwelling unit, or completely contained within a preexisting detached structure.
        • “Detached unit”: neither within nor physically connected to the principal dwelling unit, nor completely contained within a preexisting detached structure.
    • A municipality shall permit one detached accessory dwelling unit.

Provided by lawmakers

Bill Title

Relative to modifying the definition of ADUs

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