New Buffer Area Law Makes More New Hampshire Land Usable
Governor Ayotte signed Senate Bill 564 into law as Chapter 316, and the buffer provisions may unlock land property owners had written off as unusable. RSA 674:21-b limits municipal control over the placement of wells, septic systems, and related site infrastructure in perimeter buffers, residential buffers, setbacks, and open-space areas that are not wetlands or protected shoreland. It takes effect April 1, 2027.
Chapter 316 changes two areas of New Hampshire land use law: restrictions on road length and dead-end lot counts, and municipal control over site infrastructure placement in buffer areas. This blog addresses the buffer area provisions. A companion piece addresses the road provisions.
What does New Hampshire's Chapter 316 do?
(If you already read the companion piece on roads, you can skip this section.)
Chapter 316 does four things.
First, it bars municipalities from capping maximum road length if the proposed road complies with the state fire code.
Second, it bars municipalities from capping the number of housing lots on a dead-end road or street unless the cap tracks the state fire code and National Fire Protection Association Standard ("NFPA") 1141, and the lots otherwise comply with zoning.
Third, it requires municipalities to allow utilities - septic systems, wells, electric distribution, drainage, and stormwater structures - within perimeter buffers, residential buffers, setbacks, and open-space areas, provided the land is not a wetland under RSA 482-A:2, X or protected shoreland under RSA 483-B:4, XV.
Fourth, it requires municipalities to allow those same utilities in wetland buffers or conservation areas by special exception or conditional use permit, subject to the same wetland and shoreland carve-outs.
The law also blocks towns from imposing "additional restrictions regarding building or lot size for affected properties before the effective date" of April 1, 2027.
What do the buffer provisions of Chapter 316 do?
The buffer provisions do two things, and the difference between them matters.
Section III applies to perimeter buffers, residential buffers, setbacks, and open-space areas that are not wetlands or protected shoreland. Municipalities must allow wells, septic systems, electric distribution, drainage, and stormwater structures in those areas.
Section IV applies to wetland buffers and conservation areas. Municipalities must allow the same site infrastructure in those areas but only by special exception or conditional use permit.
Wetlands under RSA 482-A:2, X and protected shoreland under RSA 483-B:4, XV remain off-limits under both sections.
The "or lot" language
Chapter 316 is not limited to subdivisions. Sections III and IV apply to buffer areas "of a subdivision or lot." That two-word addition - "or lot" - extends the statutory reach to all existing parcels.
How will this play out?
A statute this new will generate questions the drafters did not anticipate. A few worth watching:
Private covenants and subdivision plans. Chapter 316 preempts municipal restrictions. A homeowner in a subdivision with recorded restrictions may find that the town has lost its enforcement power while private covenants remain intact.
Interaction with NHDES rules. NHDES rules on septic siting, well setbacks, and shoreland protection still apply. Chapter 316 removes a municipal barrier. It does not override NHDES.
Existing subdivision approvals. Older subdivision approvals often include site-specific conditions negotiated with planning boards. Whether Chapter 316 reaches those conditions - or only the general municipal ordinances behind them - is not clear from the statutory text.
Takeaway
Chapter 316 is a new law with real potential and unresolved questions. It applies to existing lots as well as new subdivisions. Section III opens ordinary buffer areas and Section IV opens wetland buffers and conservation areas, with some restrictions. This blog likely is a first look, not a final word on Chapter 316.
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