Multi-Family Property Analyzer

Properties with 1-4 units are classified as residential real estate by Fannie Mae, Freddie Mac, FHA, and VA, allowing owner-occupied buyers to access residential mortgage programs with low down payments (3.5% FHA, 5-15% conventional for owner-occupied). Investors (non-owner-occupants) need 15-25% down for 1-4 unit conventional loans. Properties with 5 or more units cross into commercial real estate, requiring commercial mortgages from banks, life insurance companies, or agency lenders (Freddie Mac Small Balance, Fannie Mae DUS). Commercial multifamily loans typically require 25-35% down, have DSCR requirements (1.20-1.30+), and may have 5-10 year terms with balloon payments even if amortized over 25-30 years.

Operating expense ratios (OER) for multifamily properties typically range from 35-55% of effective gross income, depending on property age, size, tenant-paid vs. owner-paid utilities, and management structure. Smaller properties (2-4 units) often run 40-50% OER due to higher fixed cost burden per unit. Larger properties (50+ units) achieve economies of scale and may run 35-45% OER. Properties with owner-paid utilities (master-metered electric, water, heat) run higher expense ratios. When reviewing seller pro formas, be skeptical of expense ratios below 35% — they typically omit management fees (sellers often self-manage), CapEx reserves, or understate maintenance. Recast the expenses to include realistic management fees even if you plan to self-manage.

A good value-add opportunity shows: (1) Current rents measurably below market rate (15-40% below current achievable rents for the submarket and property class); (2) Physical deficiencies (dated kitchens and baths, worn flooring, deferred exterior maintenance) that can be remediated with a defined renovation budget; (3) Operational improvements possible (below-average occupancy that reflects management issues rather than market demand); (4) A clear path to higher NOI that, when capitalized at the market rate, creates equity significantly exceeding the renovation cost; and (5) Purchase price reflecting current (depressed) income rather than stabilized potential. The typical value-add thesis targets buying at a 1-2% cap premium above market (higher cap = lower price), then compressing to market cap upon stabilization.

Agency loans are multifamily mortgages originated by approved lenders and sold to or guaranteed by government-sponsored enterprises — Fannie Mae (through its Delegated Underwriting and Servicing or DUS program) and Freddie Mac (through its small balance and conventional programs). Agency loans are the gold standard for stabilized multifamily: they typically offer the lowest rates (often 50-150 basis points below bank or insurance company pricing), longer amortization (up to 30 years), and higher leverage (up to 80% LTV for Freddie, 75-80% for Fannie). Qualifying properties must be stabilized (typically 90%+ occupancy for 90 days), have adequate DSCR (1.20-1.25 minimum), and meet property condition standards. Minimum loan amounts are typically $1 million ($750,000 for small balance programs).

In-place NOI (also called as-is or current NOI) reflects the property's actual current income and expenses as documented — the rent roll today, current vacancy, and verified operating costs. This is the conservative underwriting baseline. Pro forma NOI (also called stabilized or as-stabilized NOI) projects the property's income after planned improvements: rents raised to market rate, occupancy stabilized, and expense management implemented. Value-add investors underwrite acquisition at in-place income (to determine fair entry price given current reality) and model the path to pro forma (to determine the value creation potential). Be extremely cautious with seller-prepared pro formas that project large rent increases without clear market evidence — independently verify market rents through your own rental market research.

Price per unit (PPU) is a quick, standardized metric for comparing multifamily property values across different building sizes and markets. PPU = Purchase Price / Number of Units. The utility of PPU depends on comparing truly comparable properties — same market, same unit mix (studio vs. 1BR vs. 2BR), similar age and condition, and similar submarket. As a 2024 rough guide: Class A multifamily in major coastal markets can trade at $300,000-$600,000+/unit; Class B in Sunbelt metros at $150,000-$250,000/unit; Class C workforce housing at $80,000-$150,000/unit. PPU is most useful as a first-pass screen; cap rate and DSCR provide the more rigorous income-based analysis.

RUBS (Ratio Utility Billing System) is a method used by multifamily landlords to recover utility costs from tenants based on a formula (typically prorated by unit size, occupancy, or other factors) even where individual metering does not exist. Implementing RUBS in a master-metered building can transfer $50-150/unit/month in utility costs from landlord to tenants, directly increasing NOI by that amount. On a 20-unit building, $100/unit/month in RUBS = $24,000/year in additional NOI, which at a 6% cap rate creates $400,000 in additional property value. RUBS implementation must comply with state tenant protection laws — some states restrict or prohibit RUBS billing. It is one of the most high-ROI value-add strategies in multifamily operations.