Freddie Mac Guidelines: Primary Residence Mortgages

What Makes a Property Your Primary Residence

Fannie Mae defines a primary residence mortgage as one where at least one borrower will live in the property as their main home by the closing date. This sounds simple, but the details matter for your loan approval.

The key word here is "occupy." You don't just need to own the property — you need to actually live there. Your lender will verify this through your loan application, where you'll certify your intent to occupy the home within 60 days of closing.

Say you're buying a duplex and plan to live in one unit while renting out the other. As long as you occupy your unit as your primary residence, this qualifies as a primary residence mortgage under Fannie Mae guidelines.

Stricter Rules for High Loan-to-Value Loans

If you're putting down less than 10% (meaning your loan-to-value ratio exceeds 90%) and your loan requires manual underwriting, Fannie Mae gets more restrictive. In these cases, every borrower whose income or assets were used to qualify for the loan must occupy the property as their primary residence.

This rule prevents situations where one spouse qualifies for the loan but plans to live elsewhere while the other spouse occupies the home. With less than 10% down and manual underwriting, both spouses must live in the property if both were needed to qualify.

Most loans today go through automated underwriting systems, so this restriction mainly affects borrowers with complex financial situations that require human review.

Special Situations That Still Qualify

Fannie Mae recognizes that life doesn't always fit neat categories. Several special circumstances still qualify as primary residence mortgages even when the borrower can't immediately occupy the property.

Active-duty military personnel can get primary residence treatment even if they can't move in before closing due to deployment or military orders. Your lender will need a copy of your military orders showing the temporary assignment that prevents occupancy.

Parents can occupy a property on behalf of their adult child borrower. This helps families where parents want to help their adult children buy a home but the children will be the primary occupants. The reverse also works — if you're buying a home for a disabled family member and you're their parent or legal guardian, this qualifies as a primary residence mortgage.

Documents Your Lender Will Require

Your lender will verify your occupancy intent through several documents and certifications. You'll sign an occupancy affidavit as part of your loan application, stating under penalty of perjury that you intend to occupy the property as your primary residence.

For military borrowers claiming the deployment exception, you'll need to provide copies of your military orders. These orders must clearly show that your military assignment prevents you from occupying the property before closing.

The lender will also review your current housing situation. If you currently own a home, they'll ask about your plans for that property. Selling your current home strengthens your case for primary residence treatment on the new property.

Why Fannie Mae Cares About Occupancy

The occupancy requirement exists because owner-occupied properties perform better than investment properties. Homeowners who live in their properties take better care of them and are less likely to default on their mortgages during economic downturns.

This performance difference allows Fannie Mae to offer better terms on primary residence mortgages — lower down payment requirements, better interest rates, and more flexible qualification standards. Investment property mortgages typically require 20-25% down and carry higher rates.

The government-sponsored enterprises like Fannie Mae have a mission to promote homeownership, not real estate investment. The occupancy requirements help ensure their programs serve actual homebuyers rather than investors.

Rental Income Restrictions

If you're buying a multi-unit property as your primary residence, you generally cannot use potential rental income from the other units to qualify for the mortgage. This rule prevents borrowers from stretching beyond their means based on optimistic rental projections.

There are narrow exceptions for Home Possible mortgages [[B3-3.1-01]] and for rental income from live-in aides or accessory dwelling units [[B3-3.1-09]]. But for most primary residence mortgages, you must qualify based on your employment income and other documented sources.

Say you're buying a triplex for $400,000 and plan to live in one unit while renting the other two for $1,000 each. Even though the rental income could be $2,000 monthly, your lender cannot use this income to help you qualify for the mortgage.

Common Problems That Cause Issues

The biggest red flag for underwriters is when your current housing situation doesn't align with your stated intent. If you currently rent an apartment month-to-month but claim you're buying a primary residence in another state, expect additional scrutiny and documentation requirements.

Job relocations can create complications. If you're moving for work, your lender will want to see your employment offer letter or transfer documentation. Without clear evidence of why you're moving, the underwriter may question whether this is truly a primary residence purchase.

Timing issues also cause problems. If you close on a property but don't move in within 60 days, Fannie Mae may reclassify the loan as an investment property. This could trigger a higher interest rate or require you to pay the difference in pricing.

Multiple property ownership raises questions too. If you own several properties already, the underwriter will scrutinize why you need another primary residence. Having a clear explanation — like upsizing for a growing family or relocating for work — helps address these concerns.

References

For the official guidelines, see 4201.11: Mortgages secured by Primary Residences in the Fannie Mae Selling Guide.