Andover's ADU rules (Article XV) haven't been touched since March 2017 — years before the state's by-right detached-ADU law took effect — so several…
Read the full Andover ADU guide →Boscawen is one of the good ones: at its March 10, 2026 town meeting voters passed a five-part zoning overhaul (ADU article 107-30) that deliberately…
Read the full Boscawen ADU guide →Bow's ADU ordinance and its own homeowner infographic were last updated in 2024 — before the July 2025 state law made detached ADUs a by-right use…
Read the full Bow ADU guide →Concord passed a thorough October 2025 rewrite that brings its ADU rules in line with the new state-law floor — but the old 2017-era terms (750 sq ft…
Read the full Concord ADU guide →Yes — Epsom allows one ADU (verified with the town), up to 850 sq ft.
Read the full Epsom ADU guide →Franklin rewrote its ADU rules in 2026, swapping a discretionary special-exception process for an administrative by-right permit with a 750-950 sq ft…
Read the full Franklin ADU guide →Hooksett voters legalized detached ADUs on March 10, 2026 — but the ordinance PDF still posted on the town's own website says detached ADUs are…
Read the full Hooksett ADU guide →State law now overrides several of Hopkinton's ADU rules in your favor: the town's ordinance (§3.12, untouched since March 2019) still demands two…
Read the full Hopkinton ADU guide →The July 2025 state law guarantees one ADU by right — but Newbury's ordinance, last revised March 28, 2023, hasn't caught up: Blodgett Landing still…
Read the full Newbury ADU guide →Get a free personalized ADU report for your property in Merrimack County.
Get My Free ADU Report →Wherever a town's rules are stricter than the state floor, the state law controls. Read the full New Hampshire ADU law explainer →