Ready to explore an accessory dwelling unit loan?

Build an accessory dwelling
unit that keeps family close

Flexible financing for in‑law suites, rental space and more.

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What is an accessory dwelling unit loan?
A simple way to add extra living space to the home you love

An accessory dwelling unit (ADU) is a smaller, self-contained home on the same property as your primary residence. It might be an attached in-law suite, an apartment over the garage or a separate backyard cottage.

An accessory dwelling unit loan from Merrimack County Savings Bank is designed specifically to help you build this extra living space as an addition to a new or existing home. It provides financing for the construction of the ADU and then transitions into long-term home financing once the project is complete.

In many cases, ADU financing can be structured as a second mortgage behind an existing first mortgage.*

*Financing options and terms vary based on individual circumstances. All loans are subject to credit approval, property eligibility, and underwriting requirements. Existing mortgages must meet bank guidelines to be considered for subordinate financing. This information is for educational purposes only and does not constitute a commitment to lend.

Why build an ADU?

An ADU offers flexible home solutions that can grow with you and your family.

Common uses for ADUs

Create an in-law suite so a parent or relative can live nearby with privacy and independence.
Support multigenerational living by giving adult children or other family members their own space.
Add potential rental income to help offset your mortgage or other expenses.
Plan ahead for live-in care, a home office, or a future downsizing option on property you already love.
Increase the usefulness and potential value of your property with thoughtfully designed extra living space.

Benefits of a single-closing construction loan

One closing covers both the construction of your accessory dwelling unit and the long-term home financing.
You pay one set of closing costs instead of paying again when construction is finished.
No need to reapply or re-qualify for a new mortgage when your ADU is complete.
Your loan is designed to carry you from the building phase through everyday living in your new space.
Local construction lending specialists are with you every step of the way – answering questions, reviewing plans and helping you stay on track.

ADU financing with people-first support
Local guidance for every stage of your ADU project

Talk to a Construction Lender

From first question to final inspection, Merrimack County Savings Bank is here to help you navigate accessory dwelling unit financing with confidence.

Review your goals –
whether it is an in-law suite, a rental space, or a tranquil retreat, an ADU loan can help.
Talk through your budget,
timeline and construction plans so your financing fits your project.
Coordinate with your builder
and keep you informed throughout construction.
Help you understand the next steps,
from permits and appraisals to converting into long-term home financing.

Designed for multigenerational living
One property, many possibilities

An ADU can make it easier to bring generations together under one roof – without giving up privacy. Maybe you are welcoming an aging parent who wants to stay close to family, or a college graduate who needs a soft landing while they start a new job.

With thoughtful design and the right ADU financing, you can create a space that feels like home for the people you care about, while still fitting your long‑term plans. And if your needs change over time, an accessory dwelling unit can often adapt-from family space to a home office or carefully managed rental.

At The Merrimack, we will listen, ask questions and help you decide whether an accessory dwelling unit loan is the right fit for your situation. Being good listeners-that is Merrimack Style.