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The bill below will support shoreland protection:
HB 1540: Restoring municipal authority over accessory dwelling units in protected shoreland
What this bill does: HB 1540 updates New Hampshire’s accessory dwelling unit (ADU) law to help protect shorelines while still supporting housing options. An ADU is a small, separate living space on the same property as a single-family home—such as an in-law apartment, basement unit, or detached cottage.
The bill focuses on the protected shoreland (land within 250 feet of most lakes, ponds, rivers, and coastal waters), where new development is more likely to affect water quality. HB 1540 clarifies that towns may allow detached ADUs in protected shoreland areas, but they are not required to.
This bill responds to a change in state law that took effect July 1, 2025, which requires towns to allow detached ADUs by right (meaning automatically allowing them as long as basic standards are met) anywhere single-family homes are allowed—including within the protected shoreland. Before that change, towns could choose whether to allow detached ADUs.
Why it matters: The protected shoreland is one of the most critical areas for lake and river health. This natural buffer is the last line of defense, filtering pollution, stabilizing soils, and reducing runoff water before it reaches lakes and rivers.
Automatically allowing ADUs in the protected shoreland could lead to more impervious surfaces, soil compaction, land clearing, and polluted runoff, increasing the risk of water quality impacts.
HB 1540 is a targeted fix that applies only to the protected shoreland. It restores a municipality’s ability to decide whether detached ADUs are appropriate near the water, helping communities balance housing flexibility with the shoreline protections our lakes depend on.
Hearing Date/Time: Thurs. Jan. 22, 1:30 pm, 1 Granite Place, Room 231
Sign-In Online in Support:
STEP 1: Go to the Online Testimony Submission Form. Fill in your personal information.
STEP 2: Select the date of the hearing: Thurs. Jan. 22
STEP 3: Select Bill
Select the Committee: House Housing
Choose the Bill: 1:30 pm - HB 1540
I am: A member of the public
I’m Representing: Myself
Indicate your position on this Bill: I Support this Bill
STEP 4: Upload Remote Testimony
Tell the committee why you support the bill and why they should, too. Upload an attachment or type a few sentences into the space provided.
STEP 5: Submit
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