Devon bought a four-unit building in 2021 with a bridge loan, renovated the kitchens, and had every unit leased by the following spring. Two years later the rate on that loan reset and his payment jumped roughly $900 a month. He wasn’t selling and he didn’t need new equity. He just needed the debt to match what the building had become: a stable, fully occupied rental. That is exactly what a multi-family property refinance is for.
Refinancing a small apartment building isn’t the same as refinancing your own house. The lender cares about the property’s income first and your personal finances second, the loan terms shift depending on how many units you own, and the break-even math has to absorb higher closing costs. Here’s how it works in practice.
Rate-and-Term or Cash-Out: Two Different Refinances
A rate-and-term refinance replaces your existing loan with a new one at a better rate, a longer amortization, or both. The balance stays roughly the same and any equity stays in the building. If your current note is a bridge loan, a hard money loan, or a balloon that’s about to come due, this is the exit.
A cash-out refinance pays off the old loan and hands you the difference in cash, usually capped at 70% to 75% of the property’s value on a multi-family building. Owners use that money to buy the next property, fund a renovation, or cover a capital expense like a roof. There’s a real cost to it: a bigger loan, a lower debt service coverage ratio, and often a slightly higher rate. Before you commit, it’s worth understanding how a cash-out mortgage works, what it costs, and when it’s worth it, because the pricing tiers differ from a straight rate reduction.
Two Sets of Rules: 2–4 Units Versus 5+ Units
A duplex, triplex, or fourplex is treated as residential real estate. That keeps Fannie Mae and Freddie Mac programs on the table: fixed 30-year terms, no prepayment penalty, and loan-to-value limits that can reach 75% on a rate-and-term refinance. Five units and up crosses into commercial territory. Terms there are shorter, often five, seven, or ten years, amortization runs 25 to 30 years, and lenders want 25% to 35% equity left in the deal.
That dividing line changes who you call, what they ask for, and what the loan costs. If you’re unsure which side of it you’re on, this guide to how to finance a duplex, triplex, or apartment building covers the programs available at each size. For anything with five or more units, the commercial mortgage guide walks through qualification, pricing, and closing from start to finish.
Why Owners Refinance a Multi-Family Building
- Trading short-term debt for permanent debt. Bridge and hard money loans are built to be replaced. Moving into a 30-year fixed or a 10-year commercial note removes the balloon risk hanging over your exit.
- Cutting the rate. A drop from 7.5% to 6.25% on a $500,000 balance saves about $420 a month, or $5,000 a year, on the same building with the same tenants.
- Pulling equity out. Five years of appreciation and rent growth can free up six figures for a down payment on the next property.
- Dropping mortgage insurance. If you bought a 2–4 unit with an FHA loan, you may now have 20% equity and no reason to keep paying annual MIP.
- Cleaning up ownership. Adding or removing a partner, moving the property into an LLC, or settling an estate usually triggers a refinance.
- Consolidating a second lien. Rolling a HELOC or a seller carryback into one first mortgage simplifies your payment schedule.
How Lenders Underwrite the Refinance
On a 2–4 unit property, most lenders calculate coverage using 75% of the gross rent shown on the lease agreements. That 25% haircut is meant to absorb vacancy and operating costs. Commercial underwriters work from a trailing twelve-month operating statement instead.
Say your fourplex rents for $2,000 per unit, or $96,000 a year gross. The lender counts $72,000. At a 1.25x coverage requirement, the maximum annual payment is $57,600, or $4,800 a month. Subtract $1,100 for taxes and insurance and you’re left with roughly $3,700 for principal and interest, which supports a loan near $585,000 at a 6.5% rate. If your balance is $480,000, you have room to move. If it’s $600,000, you have a problem, and pulling cash out is off the table entirely.
You can run those figures in a few minutes with a DSCR calculator that underwrites any rental property, and it’s worth doing before you pay for an appraisal. Knowing your ceiling saves you from a declined application and a wasted $900.
What a Multi-Family Refinance Costs
Budget 2% to 3% of the loan amount, sometimes more if you’re buying the rate down. On a $500,000 loan, expect somewhere between $9,000 and $15,000:
- Lender origination fee: 0.5% to 1%
- Appraisal: $700 to $1,500 for a 2–4 unit, more for larger buildings
- Title insurance and settlement: $1,500 to $3,000
- Recording fees and transfer taxes, which vary widely by state
- Prepaid interest, plus escrow funding for taxes and insurance
- Discount points, if you’re buying the rate down
Divide the total cost by your monthly savings to get the break-even. Using the example above, $10,000 in costs against $420 a month works out to roughly two years. If you plan to hold the building five years or longer, that’s a straightforward win. If you might sell in eighteen months, it isn’t.
Getting the File Through Underwriting Without Delays
Multi-family files stall for predictable reasons, and almost all of them are documentation problems. Have these ready before you apply:
- A current rent roll showing unit numbers, lease dates, and monthly rents
- Signed leases for every occupied unit
- Twelve months of operating statements and the property bank statements
- Two years of personal and business tax returns
- Proof of insurance, including replacement cost on the declarations page
- An operating agreement or entity document if title is held in an LLC
Two more things trip people up. First, seasoning: most lenders want six to twelve months of ownership before they’ll refinance based on a new appraised value, so a quick buy, renovate, and refi rarely works. Second, prepayment penalties. If your existing commercial note carries a yield maintenance or defeasance clause, get the payoff quote in writing before you shop, because that charge can erase a full year of savings.
Watch the Rate While Your File Moves
Refinances take 30 to 60 days, and rates move inside that window. A 45-day lock usually costs less than a 60-day lock, so ask what the extension fee would be if underwriting runs long. Knowing today’s refinance mortgage rates before you lock gives you a benchmark, and it makes it easier to spot a lender padding the rate to recover fees elsewhere. Compare the APR and total closing costs side by side, not just the headline rate.
Where a Refinance Stops Making Sense
There’s a version of this decision where the best move is to do nothing. If the rate drop is under 0.75%, the break-even stretches past three years and your current loan is fine. If coverage sits below 1.20 after the new payment, no amount of shopping will fix it. If the building needs a roof or a major system replacement in the next year, handle that first and refinance afterward, since a lender will appraise the property as-is and either cut the value or hold funds back in escrow. And if you’re close to a 1031 exchange, refinancing now only complicates the timeline.
Before you call a lender, pull the last twelve months of property income, test the coverage at your target rate, and get a written payoff quote that includes any penalty. Two hours of homework on the front end beats discovering a yield maintenance charge three weeks into underwriting.