The bill amends Section 45-23-32 of the General Laws in Chapter 45-23, "Subdivision of Land," by introducing a new definitions section that clarifies the meanings of terms from the Rhode Island Comprehensive Planning and Land Use Regulation Act and the Rhode Island Zoning Enabling Act. It allows for additional definitions in local ordinances, provided they do not conflict with state laws, and specifies that these definitions will take precedence in local regulations. Key insertions include definitions for "minor subdivisions," which now encompass "oversized lot subdivisions," and the criteria for minor and major land development projects. The bill also deletes a specific provision related to development plan review, indicating a shift in project classification and management under local regulations.

Additionally, the bill addresses zoning ordinances in Chapter 45-24, allowing cities and towns to regulate single substandard lots without requiring zoning relief based solely on minimum lot size failures. It introduces provisions for dimensional modifications, permitting the zoning enforcement officer to grant modifications of up to 15% without public notice and up to 25% with notice. The new Neighborhood Character-Based Modifications (NCBM) category allows for dimensional relief based on the median dimensions of comparable residential properties. The bill outlines the approval process for infill modifications, including notification requirements for modifications exceeding 30%, and mandates that the zoning enforcement officer maintain public records of all modification requests. The act is set to take effect on January 1, 2026.