Common challenges
A single-family home that fits three generations is expensive, and standard income math ignores the rent-equivalent value of family members who contribute to the household.
Programs that fit
FHA Loans
An FHA loan is a government-insured mortgage that allows 3.5% down with a credit score of 580 or higher, or 10% down with a score from 500 to 579.
Conventional Loans
A conventional loan is a mortgage not insured by the government that follows Fannie Mae or Freddie Mac guidelines.
DSCR Loans
A DSCR loan is an investment-property mortgage that qualifies you on the property’s rental income divided by its monthly payment (the debt service coverage ratio).
HELOCs & Home Equity Loans
A HELOC (home equity line of credit) and a home equity loan both let you borrow against your home while keeping your current first mortgage.
Tips before you apply
- FHA allows 3.5% down on 2–4 unit properties when you occupy one unit; rental income from the other units can help you qualify (3–4 units must pass a self-sufficiency test).
- Some conventional programs let you add a non-occupant co-borrower, often a parent, to strengthen the application.
- Check local ADU rules: a permitted accessory unit can add real rental income to your file.
FAQ
What is the best mortgage for multigenerational families?
It depends on your documentation and goal. The programs that most often fit are FHA Loans, Conventional Loans, DSCR Loans, HELOCs & Home Equity Loans.