New Hampshire Senate Bill SB84

New Hampshire 2025 Regular Session

• Introduced: 1/22/25
• Refer: 1/22/25
• Report Pass: 2/12/25
• Report Pass: 3/6/25
• Report Pass: 3/20/25
• Engrossed: 3/28/25
• Refer: 3/28/25

Caption

Relative to zoning procedures concerning residential housing.

Summary

SB 84 would create a new state zoning rule governing minimum lot sizes for single-family homes, with the allowable minimum tied to the type of utility infrastructure serving the property. For areas without municipal or community sewer service, local ordinances could not require lots larger than 88,000 square feet. Where municipal or community water is available and there is sufficient capacity, the maximum minimum lot size would be 44,000 square feet, and where municipal or community sewer is available and has adequate capacity, the maximum minimum lot size would be 22,000 square feet. In each case, a municipality could exceed those limits only by providing empirical evidence that its water or sewer system cannot support additional homes. The bill also preserves existing development potential for lots created before July 1, 2024, and states that it does not override other zoning rules unrelated to minimum lot size. It further preserves state septic, well, and wetlands regulations, including case-by-case requirements for larger lots where environmental or public health rules require them. The act would take effect July 1, 2026.

Impact

SB 84 would amend RSA 674 by adding a new section that limits municipal authority to set minimum lot sizes for single-family residential uses. It would preempt local zoning ordinances to the extent they require larger lots than the state caps, while leaving other zoning standards and environmental regulations intact. The bill would likely affect municipalities, planning boards, developers, and property owners by making it easier to create smaller single-family lots in areas with adequate infrastructure, especially in communities seeking to increase housing supply.

Sentiment

The available vote history suggests the bill had meaningful but not overwhelming support, passing the Senate on an Ought to Pass with Amendment motion by a 13-10 vote. That margin indicates a generally favorable view of the bill’s housing-supply goals, but also substantial concern about local control and infrastructure capacity. No committee transcript is available here, so the recorded vote is the main indicator of sentiment.

Contention

The main points of contention are likely the bill’s limits on municipal zoning autonomy and the adequacy of local water and sewer systems. Supporters appear to favor the bill as a housing-affordability and housing-production measure that reduces overly restrictive lot-size requirements. Opponents are likely to argue that the state should not override local planning decisions, that infrastructure capacity should be evaluated locally, and that municipalities may face administrative and legal burdens in proving insufficient capacity or revising zoning ordinances.