New Hampshire ADU Guides

How to design a NH ADU for aging in place: single-level layout, zero-step entry, 36-inch doors, curbless shower, and future-proofing within town size caps.

Attached vs. detached garage conversion for a NH ADU: utilities, fire separation, insulation, egress, and cost compared. Both are legal by right since July 2025.

Some NH towns' posted zoning ordinances still restrict or ban detached ADUs — but RSA 674:72 overrides them. See real examples from Candia, Hollis, and North Hampton.

Concord, NH allows one ADU by right, attached or detached, under its October 2025 rewrite and state law. Size caps, parking, permits, and costs for 2026.

Some lenders count projected ADU rent toward loan qualification and many don't. How to ask, what paperwork helps, and how NH town rental rules affect it.

Yes: NH law lets your mom live in an ADU on your property, and the 2025 law removed family-only rules, so the unit stays flexible for later.

NH law lets you convert a garage into an ADU even if it violates current setbacks. What RSA 674:72 protects and what to tell the permit office.

Attached ADUs usually cost less; detached ADUs win on privacy. Both are by right in NH since July 1, 2025 — here's how to pick the one your lot supports.

Meredith still lists ADUs as a Special Exception, but the 2025 state law makes one yours by right. Sizes, parking, setbacks, and permit steps, confirmed with the town.

No single number fits every family. Here is how to compute the real monthly payment on a $300k NH ADU with your lender's rate, and how rent offsets it.

A granny pod is legally a detached ADU in New Hampshire, allowed by right since July 2025. What the label means, plus permit, code, and septic rules.

How to convert a garage into an in-law apartment in NH: structural and septic checks, design, permits under the 2025 ADU law, and a realistic timeline.

A backyard cottage in New Hampshire is legally a detached ADU, allowed by right statewide since July 2025. Rules, size limits, and setbacks explained.

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.

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.

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.

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.

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.

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.

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

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.

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.