An apartment building’s advertised cap rate is only a starting point. Before purchasing a 2–10-unit multifamily property in Los Angeles County, a buyer needs to test whether the income is collectible, the operating costs are complete, and the financing leaves enough room for risk. The goal is to understand the property as it actually operates—not just the seller’s best-case projection.
Start with the rent roll and actual collections
Request a current rent roll, executed leases, a record of rents actually collected, security deposits, concessions, past-due balances, and any separate income from parking, laundry, storage, or utility reimbursements. Confirm what is occupied, what is vacant, and whether listed rents are contract rents or theoretical market rents. An advertised vacant unit does not produce rent today.
Verify which units are legally recognized and whether applicable city or state rules restrict rents, tenancy changes, or renovations. The same nominal upside can have very different practical value across neighborhoods, buildings, and tenancies.
Rebuild operating expenses instead of accepting a pro forma
Review property taxes based on a potential reassessment after purchase, current insurance quotes, management, utilities, trash, water, sewer, repairs, maintenance, reserves for major capital items, licenses, and applicable local charges. Distinguish ordinary operating expenses from capital expenditures and debt service. Verify who is contractually responsible for each expense under any master lease or other special arrangement.
A buyer considering Los Angeles income property should stress-test insurance increases, turnover, vacancies, deferred maintenance, and unexpected repairs. Even a building with strong in-place collections can experience a temporary cash-flow squeeze during a major renovation.
Calculate net operating income and cap rate correctly
Net operating income (NOI) generally equals effective operating income minus ordinary operating expenses, before mortgage payments and income taxes. Cap rate is NOI divided by the purchase price. For illustration only: if verified annual NOI is $110,000 and a building is purchased for $2,000,000, the indicated going-in cap rate is 5.5%. This is not a valuation or return forecast for any actual offering.
Cap rate does not tell you the buyer’s financed cash-on-cash return. Loan amount, interest rate, amortization, closing costs, near-term improvements, available reserves, and the buyer’s required equity all change the picture. Underwrite the property both without financing and with your actual proposed loan terms.
Separate accessible upside from trapped upside
A vacancy may carry a premium if the unit is legitimately available, the repair budget is realistic, financing supports the project, and a new tenant can be placed on an achievable schedule. By contrast, an optimistic rent increase that depends on displacing tenants, unpermitted construction, or prohibited changes should not be treated as immediate income. Buyers should confirm regulations and obtain appropriate legal advice before relying on a repositioning scenario.
Build a conservative case, a base case, and a downside case. Change one variable at a time: occupancy, expense growth, rehabilitation costs, interest rate, and hold period. An attractive opportunity should remain understandable when conditions do not go perfectly.
Check seller and closing feasibility
Before spending heavily on due diligence, investigate ownership, existing liens and debt, title issues, tenant documentation, seller expectations, and the practical ability to close. A deal that looks profitable on paper can be unavailable at any price a reasonable buyer can finance or justify.
Put the numbers into your acquisition strategy
The value of underwriting is making better decisions about which properties deserve your attention. Define a clear buy box, ask your lender about financing, document your required reserves, and compare the evidence against your five-year objectives. For a more complete acquisition checklist, read our Los Angeles 2–10-unit buyer guide. You can also review current multifamily opportunities as starting points for property-specific due diligence.
Ready to organize your priorities? Start with our Five-Year Real Estate Investment Starter Kit, then connect with Juan Michael Sr & Associates about the types of income properties you already buy or plan to acquire.