Before continuing, there are critical considerations when combining a reverse mortgage with ADU construction that most families discover too late.
- Lender approval required: Building an ADU on a property with an existing reverse mortgage requires lender approval — which is rarely granted without significant conditions.
- Loan may need to be paid off first: In many cases the reverse mortgage must be satisfied before a permit can proceed.
- Compounding balance risk: At ~7.8% monthly compounding with no payments, a $400,000 reverse mortgage balance reaches approximately $870,000 by Year 10 and $1,284,000 by Year 15 — often outpacing home appreciation.
- Sunk costs: Families who discover this restriction mid-permit have lost thousands in design and permitting fees. Title review is essential before any planning begins.
This conversation requires a financial advisor, an estate attorney, and an independent real estate advisor — not the lender originating the reverse mortgage.
Jack Girvan has navigated this scenario with many Greater Boston families. A free 15-minute conversation could prevent a costly mistake.
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