NH HB1251

Requires municipalities to approve residential construction permits when a licensed architect certifies the proposed density matches the surrounding neighborhood's existing development patterns

Defines "downzoning" as changing zoning ordinances or maps to reduce dwelling units, decrease building size, or limit use intensity compared to what was previously permitted

Makes permit issuance "ministerial and non-discretionary" when architect certification is provided, removing municipal discretion in evaluating such applications

Places responsibility on property owners to conduct and pay for neighborhood density analysis through a licensed architect

Preserves municipal authority to enforce building codes, life safety codes, and other non-zoning regulations that apply uniformly to all residential construction

Takes effect 60 days after passage