What Is Residential Loan?
Residential loans finance 1–4 unit properties. They’re underwritten on the borrower’s income, credit score, and debt-to-income ratio—not on the property’s NOI. Multifamily financing for two-to-four-units uses residential loans; at 5 units, you switch to commercial loans. FHA loans allow 3.5% down with owner occupancy. Conventional mortgage programs offer 15–30 year fixed terms. Residential loans are the backbone of house hacking and small multifamily investing.
A residential loan is a mortgage used to finance 1–4 unit properties—underwritten on personal income, credit, and DTI, with conventional, FHA, or VA programs offering long terms and competitive rates.
At a Glance
- What it is: Mortgage for 1–4 unit properties; personal income underwriting
- Why it matters: Enables low down payment, long terms, and house hacking on two-to-four-units
- Key detail: 5+ units require commercial loans; different underwriting
- Related: Multifamily financing, commercial loan, mortgage, FHA loan
- Watch for: Owner-occupancy requirements on FHA; investment property rates may be higher
How It Works
Underwriting. Lenders evaluate your income, employment, credit score, and existing debt. They calculate DTI (debt-to-income ratio) and require it to be below a threshold (often 43–50%). For investment properties (non-owner-occupied), they may use a percentage of rental income (e.g., 75%) to offset the payment. For owner-occupied two-to-four-units, you can count full rent from the other units.
Programs. Conventional: 15–30% down for investment, 5–20% for owner-occupied. FHA loans: 3.5% down with owner occupancy. VA: 0% down for eligible veterans. Each has different rate, term, and MI (mortgage insurance) implications.
The 5-unit cliff. At 5 units, the property is classified as commercial. Residential loans no longer apply. You must use commercial loans—DSCR underwriting, shorter terms, and different rate structures.
Real-World Example
David’s duplex, Phoenix. He bought a duplex for $340,000 with a conventional residential loan—20% down ($68,000), 6.5% rate, 30-year fixed. He lived in one unit and rented the other for $1,400. His PITI was $1,950. The lender counted 75% of the $1,400 rent ($1,050) as income, so his effective housing cost was $900. Two years later, he moved out and kept the property as a rental. The loan stayed in place—no refinance required. The residential loan gave him stability and a low payment while he scaled.
Pros & Cons
- Long terms (15–30 years); stable payments
- FHA loans allow 3.5% down with owner occupancy
- Personal income underwriting; no DSCR requirement for 2–4 units
- Widely available; competitive rates
- Limited to 1–4 units; 5+ requires commercial loans
- Investment property rates and down payments can be higher than owner-occupied
- FHA requires owner occupancy for best terms
Watch Out
- Occupancy fraud: Claiming owner occupancy when you don’t live there is fraud. Lenders can call the loan.
- Investment limits: Some lenders limit the number of residential loans you can have for investment properties (e.g., 10).
- Rate premium: Non-owner-occupied residential loans often have a 0.25–0.75% rate premium.
Ask an Investor
The Takeaway
Residential loans are the gateway to two-to-four-units and house hacking. Use FHA loans for low down payment with owner occupancy, conventional for long-term stability. Plan for the switch to commercial loans when you move to 5+ units.