A bill originally intended to give New Hampshire towns a clearer playbook for handling data center development has been turned almost entirely on its head. As the New Hampshire Bulletin reports, the House Committee on Municipal and County Government voted along party lines on Tuesday, May 5, to recommend an amended version of Senate Bill 439 that does the opposite of what its sponsor first proposed: instead of empowering municipalities to set unique rules for one of the most resource-intensive land uses in the modern economy, the rewrite would forbid them from doing so.
For a legislative session that has otherwise produced unusually bipartisan deals on civil rights, housing, and even crypto kiosks, the data center fight stands out for how sharply the two parties divided.
What The Amended Bill Actually Does
Under the Republican-backed amendment, data centers would become a permitted land use “by right” in any commercially or industrially zoned area in the state. Towns would still be able to apply zoning rules to those parcels, but only on the same terms used for other allowed uses in that district. They would not be able to single data centers out for tougher setbacks, noise limits, water-use restrictions, or energy-use disclosures than would apply to a typical warehouse, light-industrial tenant, or office park.
In other words, if a town’s industrial zone allows a printing plant, a logistics hub, or a manufacturing facility, it would have to allow a hyperscale data center on roughly the same terms.
Brookline Republican Rep. Diane Pauer, the committee chair and one of the amendment’s authors, framed the change as a question of fairness and basic property rights. “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,” Pauer said.
What Sen. Altschiller’s Original Bill Did
That is a long way from where the bill started. The original SB 439 was filed by Stratham Democrat Sen. Debra Altschiller as a statewide framework for data center development. It would have:
- Limited data centers to commercial and industrial zones by default.
- Established statewide standards for setbacks and noise pollution.
- Required developers to provide written confirmation from the serving electric utility that the local grid had — or would imminently have — sufficient capacity to power the facility.
- Explicitly preserved the right of towns to impose stricter local zoning rules on top of the state floor.
The grid-capacity provision was the part that drew the most attention. Data centers consume large amounts of electricity, and concentrations of them in places like Northern Virginia, central Ohio, and parts of Texas have been linked to spiking residential power bills and accelerated buildout of new transmission infrastructure. New England already has some of the highest electricity costs in the country, a pressure point covered in our reporting on how blue states are trying to cut energy efficiency programs to bring utility bills down.
After a Senate amendment in January stripped out most of those provisions, Altschiller asked the House committee in April to restore the original framework. She told committee members that data centers were among the most disruptive forms of development in the United States, citing environmental impacts, high power use, and noise pollution. Of the version the House committee ultimately adopted, she was blunt: “That is not a framework; that’s an abdication.”
The Energy And Water Question
Lebanon Democrat Rep. Laurel Stavis, who voted against the amendment, raised the resource argument directly in committee. “I am very much concerned that we are opening the doors to large data mining centers in the state of New Hampshire, where we cannot afford to host them because we do not have sufficient energy or water to do so,” Stavis said.
She also flagged the speed of the technology curve as a reason for caution. “Data centers, we know, come with their own unique set of problems or issues that we haven’t faced before,” she said. “I mean, there’s so much we don’t know.”
That uncertainty is part of what the original bill tried to backstop. Without a written grid-capacity attestation from the utility, a town that approves a data center is essentially betting that the surrounding rate base will absorb whatever new transmission, generation, or peaking capacity is needed to serve it. Those costs typically do not stay on the developer’s balance sheet — and in a state where a recent Senate vote on environmental cost recovery cleared the deck for ratepayers to absorb more compliance expense, the question of who pays for grid upgrades is not academic.
What “By Right” Means In Practice
The “by right” designation is the part of the amendment likely to matter most over the long run. In New Hampshire land-use law, a use that is permitted by right cannot be denied through a discretionary review process such as a special exception or conditional use permit; the town’s planning board can require site plan compliance, but it cannot say no on the merits. That is a meaningful narrowing of local control, and it is part of why the committee vote split cleanly on party lines.
Supporters argue the framework is consistent with how New Hampshire has historically treated other commercial uses and avoids the kind of patchwork rules that have slowed development of housing and small business space across the state. Critics argue data centers are categorically different — closer to a small power plant than a warehouse — and deserve their own bucket.
The full House is expected to take up the amended bill in the coming weeks. If it passes in its current form, the bill would head back to the Senate for a vote on whether to concur, recede, or send it to a committee of conference where the original sponsor would have one more chance to put the local-control language back in.
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For related coverage, see our reporting on Republicans Pitch Lifeline, Tenant Advocates Warn Of Race To The Bottom.
