Direct answer
A unit-count, legal-use, rent, appraisal and insurance workflow distinguishing residential two-to-four-unit collateral from five-plus-unit financing.
File workflow
- Confirm the legal unit count and certificates/permits.
- Separate a legal unit from an accessory dwelling or unpermitted conversion.
- Collect leases, market-rent evidence and vacancy/expense assumptions by unit.
- Verify appraisal form, insurance and lender property-type treatment.
Decision record
| Evidence | Question |
|---|---|
| Dates and ownership | What is documented, and for which transaction? |
| Property and income | What legal use, value and rent evidence will be accepted? |
| Written program | Which current lender rule applies? |
| Liquidity and exit | What remains after closing and what limits an early exit? |
Joe’s Advice
“Build the file around the actual exception—timeline, unit count or investor experience—and obtain the current lender rule in writing before relying on it.”
— Joseph “Joe” Pistone, NMLS 2087918
Verified questions
Does “multifamily” mean the same thing in every loan program?
No. One-to-four-unit residential and five-plus-unit multifamily programs can use different definitions and underwriting systems.
Is every duplex eligible for a DSCR loan?
No. Legal use, condition, appraisal, insurance, rent evidence and lender rules still apply.
Can an unpermitted unit be counted automatically?
No. Verify legal status and the lender/appraiser treatment before relying on its rent.
Does Fannie Mae rental-income guidance control DSCR underwriting?
No. It is an agency comparison source, not a proprietary DSCR rule.
Primary sources reviewed August 28, 2026
Agency sources provide comparison context; proprietary DSCR eligibility remains lender-specific.