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), burdens on educational facilities (6) and emergency services (7), aesthetics and natural resources (8), planning and impacts on agricultural/forest soils and sprawl (9), and conformance with local and regional plans (10). Tchaikovsky said last year’s Act 181 added a criterion addressing “undue adverse effect on forest blocks and connecting habitats.”

On process, she explained applications are filed with one of nine district offices, reviewed by three-member volunteer district commissions appointed by the governor, and categorized as minor, administrative amendment, or requiring a public hearing. Minor permits have a statutory 20-day timeline; most applications fall into minor or administrative categories, she said. When hearings occur, members of the public may attend but only parties with a particularized interest may join as parties and later appeal a district commission decision to the Environmental Division of Superior Court and, subsequently, the Supreme Court.

Tchaikovsky outlined major changes in Act 181. The law (1) reorganized the Natural Resources Board into a full-time Land Use Review Board with additional staff; (2) created a tiered jurisdiction system (tiers 1–3) that bases Act 250 oversight partly on location rather than only on project size; (3) created tier 1A (full exemption) and tier 1B (partial exemption) pathways for municipalities that opt in and meet conditions; (4) established new housing exemptions that apply temporarily while regional plans and maps are updated; (5) added a private-road trigger (construction of a private road longer than 800 feet, or combined private roads longer than 2,000 feet) that becomes effective in 2026 with exemptions for farm and logging roads unless converted to private residential use; and (6) changed mitigation and other rules affecting wood-products manufacturers and accessory on-farm businesses.

She explained the tiering work requires municipalities and Regional Planning Commissions to produce maps and plan language and submit them to the Land Use Review Board for review; regional plans and maps must be updated by the end of 2026. Tier 1B provides a partial Act 250 exemption for up to 50 housing units in areas that the municipality and the Regional Planning Commission agree are suitable; tier 1A is a full exemption for mapped areas for all development, subject to the municipality meeting statutory conditions (permanent zoning and subdivision bylaws, infrastructure or suitable soils for community systems, municipal staff capacity, and exclusion of flood hazard/fluvial erosion areas unless the town has appropriate bylaws). Tchaikovsky noted towns without permanent zoning are not eligible for tier 1 designations.

Committee members raised several concerns that Tchaikovsky relayed and discussed. Representative Morin said she viewed the road trigger as “punitive to rural families” who might need to add a private road to keep farm land in the family; Tchaikovsky acknowledged the provision is prospective and noted farm and logging roads constructed for agricultural use are generally exempt unless converted to residential use. Representative Dustin asked about prime agricultural soils and penalties; Tchaikovsky explained that when an Act 250 permit is required and the site contains primary agricultural soils, the statute requires mitigation either by reconfiguration to avoid soils or by a mitigation payment (ratios and formulas are set in statute and rely on soil classification and average county parcel prices administered by the Agency of Agriculture). She also described a change that lowers required mitigation for certain wood-products manufacturers from prior ratios to a 1:1 mitigation ratio in specific circumstances.

Tchaikovsky said the statute remains complaint-driven in part: anyone can request a jurisdictional opinion from the Land Use Review Board or file a complaint for alleged noncompliance; the agency’s enforcement division conducts site inspections. She also noted that when a municipality assumes Act 250 jurisdiction through tier 1 designation, the municipality is expected to step into the role of enforcing any existing Act 250 permit conditions applicable to sites inside the exempt area.

Members asked about practical impacts: whether towns would absorb review and enforcement duties, whether tier 1 designations would include land enrolled in current use programs (not likely in large amounts), and how mapping will reflect downtowns and village centers (tier 1A areas are intended to roughly align with previously designated downtowns and village centers). Tchaikovsky said some details — especially rules defining tier 3 environmental protections and finer distinctions between driveways and roads — will be addressed in forthcoming board rulemaking.

The presentation closed with procedural reminders (district commissions are volunteer bodies paid a statutory per diem when they meet) and an invitation from Tchaikovsky to follow up with the Office of Legislative Counsel for questions.

Looking ahead, Tchaikovsky said regional plans and tier maps must be submitted by the end of 2026, the private-road provision becomes effective in 2026, and the Land Use Review Board rulemaking will define several implementation details. The committee members asked to invite regional planners back to show draft maps and to monitor how the tier system interacts with local zoning and current-use land.