Act 250, enacted in 1970, regulates development in Vermont to address environmental impacts but exempts most farms and small residential projects. Over time, the law has become complex and costly, often deterring development even though most permits are approved. Act 181, introduced in 2024, aimed to streamline development in town centers through a tiered review system, but controversial elements like “Tier 3” and the “Road Rule” were repealed in 2026 after public pushback. The revised framework now encourages growth in planned areas but lacks strong protections against sprawl or farmland loss, leaving its vision of balanced development largely unfulfilled.
*Here are links to the following related issues: Land Reform, Municipal Exemption, 30 x 30, and Regional Planning.
Act 250 (enacted in 1970) manages how and when proposed developments (housing, commercial buildings, etc.) are reviewed for potential environmental impacts. Under Act 250, larger developments generally receive more scrutiny than smaller ones. Farming and most commercial farm structures are exempt from Act 250 review (below the elevation of 2,500 feet) and most residential development projects do not trigger Act 250 permitting. ,
Commercial projects on at least 1 acre, and housing developments of at least 10 units are likely to trigger Act 250. In general, any project (that is not a farm structure) that meets the definition of "development" in 10 V.S.A. Section 6001 triggers Act 250.
There have been unlawful enforcement cases where the Land Use Review Board assumed jurisdiction over an entire property, even though only a fraction of the parcel was subject to Act 250 (more information about this issue is on our website).
Act 250 has become a long, complex, and contentious law because costs associated with Act 250 review are often prohibitively expensive. Despite over 98% of Act 250 permits being approved, advocates underscore that many projects fail once their managers understand the requirements of the Act 250 review process. The system does provide barriers to projects, but for those with money and time, it rarely prevents development altogether.
Act 181 (enacted in 2024) is modifying how Act 250 works to encourage denser development in town centers to meet housing development targets. Depending on a project's location within a new tiered system established by law, many commercial housing development projects may be exempt from Act 250 review starting in 2026. The new system established by Act 181 was revised by Act 152 of 2026 when the legislature responded to a large public outcry, and effectively abandoned its previous vision of Act 181 (to balance working lands and housing with land conservation interests) as the remaining intact substantive provisions are focused on meeting housing development targets in Tier 1 development areas and through regional planning:
“Tier 1” includes town centers and planned growth areas; they receive less environmental review in order to promote dense development.
“Tier 2” is the “most places” category - they receive similar environmental review as before Act 181, based primarily on development size.
Act 181, as passed, also established a “Tier 3,” a category for “critical natural resource areas”; that would receive more review and be harder to develop. Tier 3 and the “Road Rule” were established to limit further fragmentation; the road rule meant that new private road construction exceeding 800 feet, or combined roads and driveways over 2,000 feet, would require Act 250 review. However, many Vermonters opposed Act 181 and especially the implementation of Tier 3 and the road rule in the spring of 2026 – including in a Facebook group with over 15,000 members, and a rally at the statehouse. A draft Tier 3 Map caught many landowners by surprise when they realized that their own plans for the future might require Act 250 permitting, which could be extremely expensive. Many have argued that, especially the now-removed Tier 3, disproportionately harms less-wealthy landowners, as they are most likely to have land in those areas. A number of farmers have argued that, while farming is exempt from Act 250, their plans to build more housing on the farm could have triggered Act 250 because of Tier 3 or the Road Rule.
Act 152 of 2026 repealed the Road Rule and Tier 3 areas of Act 181. See more in legislative updates from 4/2/26 and 6/5/26.
What is left of Act 181 encourages planned growth areas where development barriers are reduced, without taking meaningful steps to prevent sprawl and protect agricultural land (within or beyond town centers). Act 181 does not include a legal mechanism to protect farmland from development and thus its land use vision of “balanced” concentrated development is not substantiated by policy but remains lofty.
The History of Vermont Agriculture 1840 - 2024 (“Act 250 - Critical Resource Areas” found on Slide 25)
