Legislative counsel outlines Act 250 basics and Act 181 changes including tiered exemptions and private-road rule

Ellen Tchaikovsky, an attorney in the Office of Legislative Counsel who handles land use, energy and climate matters, briefed a legislative committee on Act 250 — the State Land Use and Development Law codified in Title 10, Chapter 151 — and on changes enacted in 2023 by Act 181.

Tchaikovsky told the committee that “no person shall sell a subdivision, commence development, or commence construction of development or subdivisions without an Act 250 permit,” and reviewed the statutory thresholds and criteria that trigger review under Act 250 and the procedural steps for obtaining a permit.

The briefing matters because Act 250 governs permitting for larger commercial developments and multi-unit housing and because Act 181 layered a new, location-based tiering system and several housing-related exemptions onto the statute. Those changes could shift which projects are subject to state review and which are handled by municipalities, with implications for housing, agriculture and local government capacity.

Tchaikovsky summarized the key triggers for Act 250 review: construction of commercial or industrial improvements on more than 10 acres in towns with permanent zoning (or more than 1 acre in towns without permanent zoning), creation of 10 or more housing units, certain public/government projects, and the statutory definitions of “development” and “subdivision.” She noted additional exemptions exist in sections 6001 and 6081 of the statute and that the board and staff maintain guidance on many common questions.

She reviewed the statute’s ten substantive criteria that applicants must address in a permit application, including water and air pollution (criterion 1), sufficient water supply (2), undue burden on existing water supply (3), erosion (4), traffic congestion and safety (5),…