5+ Units vs. 2-4 Units: Why Financing Changes at Five Doors

A fourplex and a fiveplex can sit on the same street and get the same rent per door. Add one unit and the deal moves into a different lending world.

The appraisal changes. The DSCR math changes. The document list doubles. The lenders change.

Here is what moves at five doors, and how to price it before you write the offer.

Four Doors Is Residential. Five Is Commercial.

The line comes from the agencies. Fannie Mae's multifamily business lends on properties with five or more units, according to its Multifamily "Our Work" page (undated, accessed October 2026).

Below that line, a duplex, triplex or fourplex stays in residential lending. A guide from Gustan Cho Associates, published August 2026, notes that 2-4 unit loans are generally treated as residential mortgages, even though people call them "multifamily."

Residential lending has its own size cap. The 2026 baseline conforming limit for a four-unit property is $1,601,750 in most counties, according to FinanceWonk's conforming loan limit reference, last updated May 2026. That is the largest loan Fannie Mae and Freddie Mac will buy on a fourplex in a standard-cost county.

Past four units, the main question changes. A residential lender asks whether you can pay. A commercial lender asks whether the building can pay. Commercial Capital Partner, in a page published July 2026, says lenders on five units and up look at net operating income, the rent roll, vacancy and expenses "rather than just the borrower's personal income and credit score."

What Changes at Five Doors

Each row is covered below.

Same Rent, Two Different DSCRs

This is the part that surprises first-time 5+ buyers.

HonestCasa, in a 5-10 unit DSCR guide published June 2026, explains the split. One-to-four-unit DSCR lenders often divide gross market rent by PITIA. On 5-10 units, lenders focus on NOI divided by annual debt service.

Run one building both ways. Illustrative numbers, not a quote.

• Five units at $1,800 a month: $9,000 a month, $108,000 a year.
• Loan payment (principal and interest): $4,500 a month, $54,000 a year.
• Taxes and insurance: $1,500 a month, $18,000 a year.

Residential-style math: $9,000 ÷ ($4,500 + $1,500) = 1.50x.

Commercial-style math:

Same building. Same loan. 1.50x becomes 1.14x.

That matters because of the minimum. Most programs require a DSCR between 1.20x and 1.25x, according to CREquity's multifamily underwriting guide, published August 2026. At 1.25x, $61,600 of NOI supports about $49,280 a year of debt service, roughly $4,107 a month. So the loan gets smaller or your down payment gets bigger.

Where do the expenses come from? Lenders load them even if the seller didn't.

• Vacancy. Commercial Capital Partner (July 2026) puts the typical vacancy and credit loss factor at 5% to 10%.
• Management. Ridge Street Capital, in a post published August 2026, says underwriters charge a management fee, often 7% to 8% of effective gross income, even when the owner self-manages.
• Reserves. Matrix Commercial Capital's T-12 explainer, published June 2026, says careful underwriting adds replacement reserves of about $300 to $500 per unit per year.

For the full formula, see how to calculate DSCR.

Value Moves From Comps to Cap Rate

On 2-4 units, the appraiser compares your building to nearby sales of similar buildings. A guide from New Jersey Real Estate Appraisal, published August 2026, describes Form 1025 as Fannie Mae's report for two- to four-unit properties and says five or more units fall under commercial appraisal standards.

The method changes too. AppraiserPoint's multifamily guide (undated, accessed October 2026) says 5+ unit appraisals rely more on the income approach, usually run longer and cost more, and in most states need a Certified General appraiser.

In practice, value becomes NOI divided by a cap rate. Using the example above at an illustrative 6.5% cap rate:

• $61,600 ÷ 6.5% = about $948,000.
• Every $1,000 of NOI is worth about $15,400 of value.
• Cut $5,000 of annual expenses and you add about $77,000 of value.

That cuts both ways. Below five units, the house next door can carry your value. Above five, the seller's books carry it. If the T-12 is weak, the value is weak. Our guide on how to calculate cap rate walks through the math.

The Document List Gets Longer

A fourplex file runs on leases and a rent schedule. A 5+ file runs on the building's operating history.

A multifamily underwriting guide from Rod Khleif, published April 2026, lists what to ask for: a unit-by-unit rent roll, a trailing 12-month income and expense statement, two to three years of operating statements, utility bills, tax bills, insurance and the leases.

The two key papers have to agree. CREquity's August 2026 guide calls unexplained gaps between the rent roll and the T-12 the most common deal-killer at prescreen.

Pro forma rents don't count either. Ridge Street Capital's August 2026 post says underwriters work from signed leases and the appraiser's rent schedule, so tenants below market get underwritten at what they pay today.

When a 5+ Deal Needs a Bridge First

Agency money wants a stable building. A Fannie Mae multifamily program page from SelectCommercial, published August 2026, says eligible properties generally need at least 90% occupancy for 90 days.

Size is the second filter. Fannie Mae's "Our Work" page lists deals from $1 million to $3 billion.

Now picture a six-unit building priced at $700,000 with three empty units. It is too small for that program. It isn't stable enough either. That's a value-add deal, and value-add deals usually start with short-term money and refinance once the rent roll is full. Our multifamily bridge loan guide covers that path, and the multifamily loans guide covers the long-term options.

How to Play the Line

Want residential math? Stop at four. Many investors scale with fourplexes because each one is underwritten on rent against the payment. Our DSCR loan program is built for rental investors.

Buying five or more? Underwrite like the lender. Load vacancy, management and reserves before you offer. If the deal only works at 1.50x on gross rent, it doesn't work.

Check your track record. Experience rules vary by lender. One example: Ridge Street Capital's August 2026 post says its 5+ unit DSCR loans need either one prior 5+ unit property or three completed 1-4 unit investments. Ask each lender for its rule up front.

Brokers: ask for the T-12 on day one. A 5+ file without a rent roll and T-12 isn't ready to submit. Collecting them early saves the deal a week.

Where Funded Capital Fits

We lend to real estate investors: fix & flip, DSCR rental, bridge, multifamily and ground-up. Here are the numbers, as of Funded Capital's rate sheet dated September 23, 2026:

• DSCR from 6.0%. A starting rate, stated as a range, not a guarantee.
• Fix & Flip from 8.75% for value-add 2-4 unit buildings you plan to renovate and sell or refinance.
• Credit: most programs 660+, best tiers 680+, 640-659 case by case.
• Coverage: 45 states. Excluded: VT, UT, OR, SD, ND.
• Closing: 5-10 business days, deal-dependent.

Terms are subject to underwriting, appraisal, title, and insurance.

Price your deal both ways before you commit. Start with our calculator.

Apply Now

Four doors or forty, we'll tell you how the deal underwrites before you write the offer. Apply now or call (305) 857-5620.