What to check before buying a 2-6 unit investment property — rent roll, expenses, legal status, and financing.
Buying a multifamily property isn't just a bigger version of buying a house — it's buying a small business with tenants, income, and operating costs attached. Beyond the physical condition of the building, a buyer needs to verify that the income is real, the expenses are accurate, and the units are legally permitted to be rented the way they're being marketed.
The rent roll should show, for each unit: current tenant, lease start and end dates, current rent, security deposit held, and whether rent is paid on time. Compare the seller's stated rents against actual bank deposits or tenant ledgers where possible — asking rents and collected rents aren't always the same thing. Also check whether any units are below market rent, which affects both current income and future upside.
Sellers sometimes present optimistic expense estimates. Request actual utility bills, property tax bills, insurance statements, and any service contracts (landscaping, snow removal, maintenance). Common expense categories to verify include:
In Queens, Nassau County, and much of the New York metro area, illegal or unpermitted units are a real and common risk — a basement or attic apartment may be rented but not legally recognized as a dwelling unit. This affects financing, insurance, and resale value, and can create liability if discovered after purchase. Before closing, it's worth verifying:
A real estate attorney or title company can help pull this documentation, and a local agent familiar with the area's building department records can flag likely issues early.
A multifamily inspection should cover the same structural and mechanical systems as a single-family inspection, but often across multiple units and shared systems. Pay particular attention to the roof (a larger and more expensive system than on a single-family home), the age and condition of separate or shared HVAC/boiler systems, electrical capacity if units have been added over time, and foundation or drainage issues that affect the whole building.
Multifamily properties typically require a landlord or commercial multifamily policy rather than a standard homeowners policy. Premiums and requirements vary based on number of units, building age, and claims history — it's worth getting a quote before finalizing your offer, since insurance cost affects overall returns.
Financing terms often differ based on the number of units: many lenders treat 2-4 unit properties similarly to residential financing, while 5+ unit buildings typically require commercial financing with different underwriting, down payment, and rate structures. Confirm with your lender early which category your target property falls into, since it affects your financing timeline and terms.
Capitalization rate (net operating income divided by purchase price) is a common way to compare multifamily properties, but it's only as reliable as the income and expense figures behind it. A property advertised with an attractive cap rate based on optimistic assumptions can look very different once verified rents and real operating costs are applied. Always recalculate cap rate using your own verified numbers, not the marketing materials alone.
No. This guide is educational and general in nature. Multifamily transactions involve legal, tax, and financing considerations specific to your situation — consult a licensed attorney, accountant, and lender before making a purchase decision.
Your attorney or title company can typically pull the certificate of occupancy and permit history from the local building department as part of the due-diligence process.
Reluctance to share leases, bank records, or expense documentation is worth treating as a flag for closer scrutiny, not a reason to rely on summary figures alone.
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View Investment PropertiesThis guide is educational and reflects general real estate practice in the New York metro area; it is not legal, tax, or investment advice. Consult a licensed attorney, accountant, and lender for guidance specific to your situation.