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New Hampshire ADU Guides

Plain-English articles on the 2025 law, costs, and building an ADU in NH · Updated 2026-09-10
Building an ADU in Manchester, NH: The 2026 Deep Dive

Manchester, NH rewrote its zoning code effective March 1, 2026. Here's the full ADU picture: districts, size caps, permits, costs, and the rules still in conflict with state law.

Published 2026-09-08
HELOC vs. Cash-Out Refi vs. Construction Loan for a NH ADU: Which Fits You?

HELOC, cash-out refi, home-equity loan, or construction loan for your New Hampshire ADU? How each works, when each wins, and the mistakes to avoid.

Published 2026-09-04
Assisted Living vs. an ADU in New Hampshire: The Real 10-Year Cost Math

Assisted living in NH commonly runs $70k-$100k+ a year. An ADU is a one-time $275k-$400k+ build your family keeps as equity. The 10-year math, worked out.

Published 2026-09-01
How Much Does a Garage Conversion Cost in New Hampshire? (2026 Numbers)

Garage conversion ADU costs in New Hampshire for 2026: why conversions sit at the budget end of the $275,000-$400,000+ ADU range and what drives the price.

Published 2026-08-28
Can My Town Say No to a Detached ADU? What NH Law Actually Allows in 2026

No — since July 1, 2025, RSA 674:72 makes one detached ADU legal by right in every NH town. What towns can still regulate, and what to say at the counter.

Published 2026-08-25
ADU Financing in New Hampshire: How Families Actually Fund a $300k Build

How New Hampshire families fund a $300k ADU: HELOC vs cash-out refinance vs home-equity loan vs construction loan, and which fits your situation.

Published 2026-08-21
Housing an Aging Parent in NH: Why an ADU Beats Assisted Living for Many Families

Why NH families are building ADUs for aging parents instead of paying for assisted living: cost comparison, independence, and what the 2025 law guarantees.

Published 2026-08-18
Can I Convert My Garage Into an ADU in NH? (Yes - Even If It Doesn't Meet Setbacks)

New Hampshire law lets you convert a garage into an ADU even if it misses today's setbacks. Here's what RSA 674:72 protects and how permitting works.

Published 2026-08-14
Detached ADUs Are Now Legal By Right in Every New Hampshire Town

Since July 1, 2025, every NH single-family lot can add a detached ADU by right under RSA 674:72 — even where the town's website still says otherwise. Here's what changed.

Published 2026-08-11

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