Small Multifamily Investing (5-10 Units): Beyond Residential Financing

Five units is a magic number in real estate. At 4 units or fewer, your property is treated like a single-family home for almost everything that matters: financing, appraisal, tax classification, insurance. At 5 units or more, you've crossed into commercial territory. The math changes, the financing changes, and the competition shifts away from owner-occupants and casual investors. For the right operator, that's exactly where the value lives.

This guide walks through what changes at 5+ units, the commercial financing landscape, the NOI-based valuation that beats comp-based pricing, and how to find deals in this often-overlooked asset class. For comparison with smaller properties, see our duplex guide and single-family vs. multifamily.

What changes at 5+ units

Financing flips to commercial

The big one. At 5+ units, residential mortgage products disappear. No 30-year fixed Fannie/Freddie loans. No FHA 3.5% down. No VA. Instead you're borrowing from commercial banks, credit unions, or through commercial Fannie/Freddie programs (which exist but are different products with different terms).

Typical small-multifamily commercial loan terms in 2026: 70-75% LTV, 5- or 7-year fixed rate followed by a balloon, 20-25 year amortization, rates 0.5-1.0% above comparable residential. Lenders care about Debt Service Coverage Ratio (DSCR) — typically requiring 1.20-1.30x.

Think of commercial as a corporate loan against a business, not a home loan. Lenders evaluate the property's income, not your W-2 paystub. Your personal credit and net worth still matter, but they're not the primary qualifier.

Valuation flips to income approach

Single-family homes (and 2-4 unit residential) appraise based on comparable sales. Five-plus unit properties appraise based on the income approach — NOI divided by market cap rate. This is the structural reason small multifamily can be a value-creation playbook.

Raise rents $50/unit on a 6-unit property and you've added $3,600/year of NOI. At a 7% market cap rate, that's $51,400 of property value created. Compare to single-family where rent increases don't directly impact appraisal until comps catch up. See our cap rate explainer and rent setting guide.

Less owner-occupant competition

Single-family rentals compete against owner-occupants who can pay 10-20% more because they're buying a home, not an investment. Duplexes have the same problem from house hackers. At 5+ units, owner-occupant competition essentially disappears. You're competing with other investors using the same NOI-based math you are.

That means deals are priced rationally. A 6-unit at a 7% cap is a 7% cap because the buyer pool agrees. A single-family rental can sell at a 4% effective cap because someone wants to live there. This rationality is a feature, not a bug — it lets you actually find yield.

Management requirements increase

At 5-10 units, you're running a small business, not just owning rentals. Most owners hire a property manager — typical fees 4-7% of gross rent (lower than single-family because there's economies of scale per door). Many add a part-time on-site maintenance person at 10+ units.

DIY is doable at 5-6 units if local. Above 8, almost everyone hires PM. See our PM cost analysis.

Commercial financing options

Local and regional banks

Your best starting point for sub-$2M deals. Local banks know the market, will lend on relationship, and often offer 5/25 (5-year fixed, 25-year amortization) or 7/25 structures. Rates are competitive but expect prepayment penalties (2-3% in years 1-3).

Credit unions

Often the best rates and terms for borrowers willing to keep deposits. Many have specific commercial real estate programs for 5-20 unit properties.

Fannie Mae Small Loan / Freddie Mac SBL

For loans between $1M and $7.5M (Fannie) or $1M-$7.5M (Freddie). 30-year amortization, 5/7/10/15-year fixed terms, non-recourse (huge benefit). Tighter underwriting but better terms than local banks for the right deal. See our DSCR loan guide for related products.

SBA loans

SBA 504 and 7(a) work for owner-occupied small commercial but generally don't work for pure investment property. Skip.

Bridge and private money

For value-add deals where you need capital fast or the property doesn't currently support permanent financing. Bridge rates 9-12%, 12-24 month terms. Plan exit to permanent financing once stabilized.

Underwriting a 5-10 unit deal

Three numbers dominate: NOI, cap rate, DSCR. Build a clean underwriting:

Gross income: Sum of all unit rents (use actual or pro-forma if value-add). Add other income: laundry ($20-$40/unit/month), parking ($25-$100/space if applicable), pet fees, late fees.

Vacancy: 5-8% market-typical, more for value-add. Don't use 0%.

Operating expenses: Typically 35-50% of effective gross income for small multifamily. Include taxes, insurance, utilities (water/sewer/garbage on most), management (5-7%), maintenance (5-8%), CapEx reserves (8-10%), legal/admin, supplies. See our full expense breakdown.

NOI = Gross Income − Vacancy − Operating Expenses. Do not include mortgage in NOI.

Finding deals

Small multifamily is the most underexplored space in residential real estate. Sources:

LoopNet and Crexi. The MLS for commercial. Most listings are overpriced but it's a starting universe.
Commercial brokers. Build relationships with brokers who specialize in 5-50 unit properties. Many deals never hit the public market.
Direct mail to absentee owners. Pull tax records for properties with 5-20 units and an out-of-area mailing address. Higher response rate than residential because owners are tired and ready to sell.
Driving for dollars. Older walk-up apartment buildings in transitioning neighborhoods often have absentee owners who haven't raised rents in years. See our finding deals guide.

Value-add playbook

The classic small multifamily strategy is buy-undermanaged-and-improve. Look for properties where:

Rents are 10-20% below market.
Operating expenses are inflated due to deferred maintenance or poor management.
Deferred CapEx (old roof, old HVAC) is depressing perceived value.
Vacancy is high due to poor management or bad reputation.

Each one of these is a lever you can pull. A property purchased at $100,000/unit with $300/unit below-market rent can become a $130,000/unit property after 18 months of repositioning. The $30K/unit lift × 6 units = $180,000 of value created on a deal that cost $600,000 to buy. See our BRRRR method for a related strategy.

The downside risks

Balloon refinance risk. Your 5-year loan ends right when rates may be high or the market may be soft. Plan for it: have liquidity for refinance closing costs, watch DSCR carefully, consider rate locks ahead of maturity.

Concentration. One bad neighborhood = all 8 units suffer simultaneously. Single-family at least lets you geographically diversify.

Operational complexity. Six leases, six bookkeeping streams, six maintenance request queues. Without systems, you'll burn out fast.

Liquidity. Selling a 6-unit takes 90-180 days versus 45-60 for a single-family. Plan for this if you might need exit speed.

Tax considerations

Same depreciation framework as smaller residential — 27.5 years on the building. Cost segregation studies become more cost-effective at this scale ($3,000-$8,000 study fee, but multiplied across 6+ units). Bonus depreciation can deliver 30-60% of building value as Year 1 deductions. See our cost segregation guide.

The bottom line

Small multifamily (5-10 units) is the natural step beyond duplexes for serious investors. Commercial financing trades flexibility for scale. NOI-based valuation gives you direct levers to create value. Less competition from owner-occupants means rational pricing. And the operational scale lets you afford professional management without crushing your margins. The trade-off is more complexity, balloon refinance risk, and higher operational sophistication. For investors aiming at $5M+ portfolios, this is where the path runs.

For the financing side in detail, our sister site MortgageMathLab covers DSCR underwriting and balloon refinance scenarios.