A bipartisan supermajority of the New Hampshire House of Representatives voted Thursday, May 14, to set aside a Republican-led data center zoning bill that would have stripped towns of their ability to write rules specific to hyperscale computing campuses. The motion to table the bill passed 304-11 with no further debate, ending the most aggressive 2026 attempt to limit local control over what is fast becoming one of the most contentious land-use questions in New England. According to the New Hampshire Bulletin, the motion was made by Rep. Keith Ammon, a New Boston Republican who had co-authored the underlying amendment alongside Brookline Republican Rep. Diane Pauer.
The vote effectively shelves Senate Bill 439 for this session and hands the policy fight back to a House committee that has signaled it will work through the summer on a different framework. For NH towns, particularly the ones in southern Hillsborough and Rockingham counties already fielding informal inquiries from data center developers, Thursday’s tabling preserves the existing patchwork of local zoning authority for at least one more legislative cycle.
How the Bill Got Here
The bill that the House tabled was nearly the opposite of what its Senate sponsor had originally introduced. SB 439 began life under Sen. Debra Altschiller, a Stratham Democrat, with text that would have established statewide minimum standards for data centers, including aesthetic controls, pollution requirements and explicit language preserving towns’ ability to enact stricter rules with their own zoning. The bill also required developers to produce written confirmation from the serving electric utility that the local grid had or would soon have the capacity to power the proposed center.
That original framework drew a mix of cautious support and skepticism, but it was broadly consistent with the way other states have approached the rapid growth of hyperscale computing development. It set a floor and left towns free to build higher.
The House Committee on Municipal and County Government rewrote the bill on May 5. As we covered at the time in our piece on the House committee advancing the bill stripping town power, the amendment by Pauer and Ammon flipped the design. The new text would have designated data centers a permitted land use “by right” in commercially and industrially zoned areas, while forbidding towns from singling them out for tougher rules than would apply to a typical warehouse, office park or light-industrial tenant. Towns could still apply their general zoning rules, but they would lose the ability to write requirements that treated a hyperscale facility differently than, say, a printing plant.
That amendment cleared the committee 11-9 on a straight party-line vote. We explored the full mechanics of the rewrite in our deeper analysis of how the amendment turned local control into a fairness fight. Pauer framed the change as a question of parity. Speaking in committee, she argued, “A data center is an enterprise, and it shouldn’t be treated any differently than any other type of enterprise that seeks to do business here.” Democrats on the committee countered that data centers are not equivalent to a typical commercial use because of their unusually large demand for electricity, water and continuous cooling, plus their well-documented noise impacts on neighborhoods.
What the Full House Did on May 14
The full House took up the amended bill during a busy session day on May 14 and disposed of it quickly. Ammon, who had co-authored the amendment, made the motion to table the bill. Tabling is a procedural move that sets a bill aside without a substantive vote on its merits. It does not formally kill the bill, but in practice it ends the bill’s forward motion in the chamber.
The motion carried 304-11. That is a striking margin in a chamber that frequently splits closely on contested measures, and it is particularly notable because the result implies that nearly every Republican in the House sided with nearly every Democrat. For a measure that had cleared committee on a straight party-line vote nine days earlier, the full-floor reversal indicates that the Pauer-Ammon design had not held its own caucus.
There was no further discussion on the floor after the motion. Within minutes, the chamber’s Democratic caucus released a statement praising the move. Rep. Laurel Stavis, a Lebanon Democrat and the ranking member on the House Committee on Municipal and County Government, said the committee would continue its work over the summer to build a framework for data center regulation in NH. That signals that the door to a new bill in the 2027 session is open and that the work will happen outside the rush of the closing weeks of the current session.
Why Towns Were Watching So Closely
Data centers have become the most politically interesting land-use category in New England because they pair very large infrastructure footprints with very real impacts on residential electric bills. Hyperscale facilities are among the most power-hungry forms of commercial development in the United States, and their concentration in regions like northern Virginia has driven double-digit residential rate increases there. That national context has been moving steadily north as developers look for cooler climates, lower industrial electricity costs and room to build at scale.
For Granite State towns, the concern is not theoretical. Industrial parks in places like Merrimack, Salem and Londonderry already field inquiries from real estate brokers acting on behalf of data center clients. A by-right designation would have meant that, in many of those towns, a hyperscale developer could pull a building permit on a qualifying parcel without needing the discretionary approvals that towns currently use to weigh traffic, sound, water, grid capacity and visual impact.
That discretionary review is the single most powerful tool small towns have to shape what gets built and on what terms. Even where the local answer is ultimately yes, the discretionary process tends to produce conditions of approval that hyperscale builders elsewhere have agreed to, including stricter noise limits at the property line, water-use reporting and contributions toward grid upgrades. Losing that tool would have shifted a meaningful portion of the negotiating power from the town to the developer.
The bipartisan supermajority that tabled the bill suggests that legislators heard from those towns. The 11 votes that opposed the tabling motion are a small minority, but the lopsided margin against the bill in its amended form was telling. Several Republican members of the House Committee on Municipal and County Government appear to have walked away from their committee vote once the bill reached the floor, an unusual posture that reflects the political risk of being seen as overriding local control.
How This Fits the Broader 2026 Session
The data center tabling lands in the same week as a clutch of other consequential bill movements at the State House. On the same day the House disposed of SB 439, the Senate also rejected the latest effort to rewrite the religious vaccine exemption process, and a wave of high-profile end-of-session education bills moved forward on book challenges, divisive concepts and special education funding. May 14 was the final day for amending legislation, and the closing rush at the State House has produced a series of decisive procedural moments rather than substantive new policy.
For data center policy specifically, the next stage of the conversation will likely happen in committee rather than on the floor. Stavis’s statement that the committee will continue its summer work points to an interim study or workshop process that would aim to produce a balanced framework for the 2027 session. That framework would likely revisit the questions Altschiller’s original bill tried to answer, including how to set statewide minimum standards while protecting towns’ ability to layer on additional rules where local conditions warrant.
The dynamic worth watching is whether New Hampshire ends up with a framework that resembles the original SB 439 in spirit, namely a state floor plus local discretion, or whether the politically powerful idea of treating data centers like any other industrial use returns in a new form. The 304-11 vote suggests that the second framing has lost a lot of ground in just nine days. It does not, however, mean the underlying policy fight is over.
What This Means for NH Residents
For people who live in towns that have been informally approached by data center developers, the practical takeaway is that local planning boards retain their full toolkit. Discretionary review processes, conditional use permits, site plan review and the ability to write data center-specific zoning amendments remain available. Towns that have wanted to get ahead of the question have time to do so during the off-session.
For people who pay an electric bill in New England, the longer-term concern is that the demand picture for data center electricity is changing fast. ISO New England’s most recent capacity reports show growing pressure from large new loads, and the cost of supporting those loads ultimately lands on every customer through the wholesale electricity market. That is part of why the original Altschiller bill included a grid-capacity sign-off requirement and why the topic is unlikely to stay quiet during the interim.
The fight that wrapped up on May 14 is not the last word on data center policy in New Hampshire. It is, however, a clear marker that the state’s elected representatives, across both parties, are not yet ready to take the discretion away from towns. That posture matches the broader instinct in NH that local control should not be traded away cheaply, even for development that brings jobs and tax base.
