A multifamily appraisal lands on a lender’s desk with one number on the cover and forty pages behind it. But those pages matter more than the number. An apartment building sells for its rents, so the appraisal stands or falls on the rent roll, the expenses, and the cap rate. If you underwrite apartment loans, those are the pages to read first.
- How a multifamily appraisal turns a rent roll into value.
- Which rent roll and expense details deserve a second look in the report.
- What owners can prepare so a refinance appraisal holds up.
How a Multifamily Appraisal Values an Apartment Building
Apartment buildings trade on income, so the income approach carries the most weight. The appraiser estimates what the building should earn in a typical year. Then the cost to run it comes off, and the result converts into value. The sales comparison approach checks that answer against recent apartment sales, usually on a price per unit basis. The cost approach rarely drives the number on an existing building, though it can matter on new construction.
Unit count changes the paperwork too. Under the OCC’s appraisal rule for national banks, a transaction not secured by a single 1-to-4 family residential property counts as a commercial real estate transaction. So a five-unit building falls on the commercial side. The same rule calls for a State certified appraiser on federally related commercial transactions over $500,000. Two- to four-unit buildings still go on the residential Fannie Mae Form 1025, where the income approach is a simple gross rent multiplier. At five units and up, the work usually moves to a full commercial income analysis instead.
The Rent Roll Comes First
The rent roll lists every unit in the building and what each one pays. A usable one shows unit number, unit type, tenant, lease start and end, contract rent, and any concession. It should also flag vacant units, down units, and units set aside for staff. The appraiser checks it against the leases and the trailing twelve months of operating statements. In many assignments, bank deposits get checked too.
Then contract rents get compared to market rents. If in-place rents sit well below market, the building has upside a buyer will pay for, but only with time and turnover. If rents sit above market, that extra income may not survive the next lease cycle. Concessions matter here as well. One free month on a 12-month lease cuts the effective rent by about 8.3 percent, and a rent roll showing only face rent hides that.
From Occupancy to Net Operating Income
Occupancy comes in two versions. Physical occupancy simply counts occupied units. Economic occupancy compares the rent actually collected against the rent the building could earn. A building can be 96 percent physically occupied and still collect far less because of concessions, delinquency, or below-market leases. So the appraiser applies a vacancy and collection loss based on the market and the building’s history, not just today’s snapshot.
Operating expenses get the same scrutiny. Property taxes, insurance, owner-paid utilities, repairs, payroll, management, and replacement reserves all come out before net operating income. Then appraisers usually test each line per unit against comparable buildings. An owner who self-manages still carries a market management fee in the analysis, because a buyer would pay one. We walked through the full build in our guide to net operating income in commercial real estate.
Cap Rate, Price Per Unit, and the Gross Rent Multiplier
Direct capitalization divides one year of stabilized NOI by a market cap rate. That rate should come from confirmed sales of similar apartment buildings, not a national survey. Our explainer on the cap rate in commercial real estate covers where those rates come from. For a building in lease-up or mid-renovation, the appraiser may run a discounted cash flow instead, as our income approach guide explains.
Consider a hypothetical 24-unit building averaging $1,650 a month per unit. That comes to $475,200 a year in potential rent. Add $14,400 in parking and laundry income, then take 5 percent for vacancy and collection loss. Effective gross income lands at $465,120. Subtract $6,800 per unit in expenses, including reserves, and NOI comes to $301,920. At a 6.75 percent cap rate, the indicated value is about $4,470,000, or roughly $186,000 per unit.
Now move the cap rate to 7.25 percent. Same building, same rents, and the value drops to about $4,160,000. Half a point cost more than $300,000. That is why the cap rate support deserves as much attention as the rent roll.
The gross rent multiplier is the quick check. It divides price by gross rent, so it skips expenses entirely. Here, $4,470,000 over $475,200 in annual rent is about 9.4. If similar buildings nearby traded closer to 8 times rent, the appraiser has some explaining to do.
What Lenders Should Check Before Relying on the Number
A lender does not need to redo the appraisal. But a handful of checks catch most problems.
- Rent roll date. It should sit close to the effective date, and the unit count should match the building.
- Contract versus market rent. The report should show both and say which one drives the income.
- Concessions and delinquency. Look for the adjustment, not just the face rents.
- Expense support. Per-unit expense comparables, a market management fee, and reserves.
- Cap rate support. Confirmed apartment sales in the same submarket, with the income extracted for each.
- As is versus as stabilized. If the report gives both, know which one your loan depends on.
The OCC rule also expects appraisals to analyze and report deductions for partially leased buildings and non-market lease terms. That applies directly to a building mid-turnover or full of below-market leases. If the report skips it, ask why.
Where the Apartment Market Sits Right Now
Market data sets the backdrop for those assumptions. CBRE’s Q2 2026 multifamily figures put national vacancy at 4.3 percent, with average rent at $2,257 a month. Net absorption also beat new completions for a second straight quarter. In its release, CBRE said the Midwest led the country in annual rent growth at 2 percent.
Chicago looks tighter than most. Cushman & Wakefield’s Chicago MarketBeat reported 94.9 percent occupancy in Q2 2026, above the 10-year average of 93.8 percent. Effective rents rose 3.2 percent year over year. Still, a metro average does not appraise a 24-unit walk-up in Rogers Park. Instead, the submarket, the building’s condition, and its actual leases decide that.
For Owners: Get the File Ready Before the Appraiser Calls
If you own the building and a refinance is coming, most appraisal delays trace back to missing paperwork. So pull these together before the lender orders the report.
- A current, dated rent roll with concessions and vacant or down units marked.
- The trailing 12 months of income and expenses, plus the two prior calendar years.
- Copies of the leases, or at least a sample, plus any commercial leases in the building.
- Recent tax bills, the insurance declarations page, and the utility bills you pay.
- A dated list of capital work, such as roofs, boilers, and unit renovations, with what each cost.
Then reconcile the rent roll to your bank deposits yourself. If they don’t match, the appraiser will find it, and the explanation takes longer later than now. Don’t annualize your best month either. Appraisers work from the trailing twelve months and the market, so an optimistic pro forma won’t carry the value. A clean file won’t raise the number. Still, it keeps an appraiser from discounting the number for uncertainty.
Underwrite the Rent Roll, Not the Offering Memo
An offering memo shows the building at its best. A credible multifamily appraisal shows it the way a typical buyer would see it, with market rents, real expenses, and a cap rate taken from actual sales. So read the rent roll analysis before the value on the cover. If the income holds up there, the number usually does too.
Underwriting an Apartment Loan This Quarter?
PahRoo appraises apartment buildings from the rent roll up, with market rent, expense, and cap rate support your credit team can check line by line.
Frequently Asked Questions
How are apartment buildings appraised?
Mainly through the income approach. The appraiser analyzes the rent roll and operating statements, estimates market rent, vacancy, and expenses, and converts net operating income into value with a cap rate drawn from comparable sales. Price per unit and gross rent multiplier comparisons from recent apartment sales serve as a check.
What is a rent roll?
A unit-by-unit list of a building’s tenants and rents. It typically shows unit number and type, tenant, lease start and end dates, contract rent, concessions, and which units are vacant. Appraisers compare it against the leases and operating statements before relying on it.
How does NOI work for multifamily?
Net operating income is effective gross income minus operating expenses. For an apartment building, that means potential rent plus other income such as parking or laundry, less vacancy and collection loss, less taxes, insurance, owner-paid utilities, repairs, payroll, management, and reserves. Debt service is not deducted.
What is a gross rent multiplier?
The ratio of a property’s sale price to its gross rent. Fannie Mae’s Form 1025 for two- to four-unit properties multiplies gross monthly rent by a GRM to indicate value. For larger apartment buildings it works mainly as a quick check on the full income analysis, since it ignores expenses.
How many units make a property commercial?
Under federal bank appraisal rules, a loan secured by anything other than a single one-to-four family residential property counts as a commercial real estate transaction, so five units and up falls on the commercial side. Two- to four-unit properties usually go on residential appraisal forms. Individual lenders may draw their own lines for specific loan programs.
Multifamily Valuation for Lenders and Owners
Every apartment assignment at PahRoo Appraisal & Consultancy starts with the rent roll, across Chicago and Cook County, Dallas-Fort Worth, Philadelphia, Phoenix, and Naples. Our commercial appraisal services page lists the property types we cover. For local scope and timing questions, start with our Chicago appraisal services page.