Small multi-family properties (2–4 units) are primarily valued by comparable sales — similar to SFR. As you move to 5+ unit buildings, income-based valuation (NOI divided by cap rate) becomes the dominant method. Understanding which method applies to your specific property is critical for ARV calculation. A 4-unit building in an area with strong investor sales comps may be valued differently than the income approach would suggest.
Your buyer pool for a renovated duplex or triplex is different from SFR. Investors and house hackers dominate. Investors underwrite deals on cap rate and cash flow — your property must pencil as a rental to get a buyer offer. House hackers are motivated by the ability to offset their mortgage with rental income — show the actual rent potential clearly in your listing materials.
Multi-family rehabs involve the same unit-by-unit scope as SFR — kitchen, bath, flooring, paint — but multiplied by each unit. Common building-level items add to scope: shared laundry rooms, exterior common areas, shared HVAC or boiler systems, parking areas, and hallways. Budget $15k–$25k per unit for a cosmetic renovation and $40k–$65k per unit for a full gut.
A renovated 4-unit building acquired at $350k with $120k rehab and ARV of $600k produces $130k gross profit before selling costs — significantly more than a typical SFR flip. The larger dollar amounts require more capital but also more expertise. Stick to 2–4 unit buildings until you have the experience base for larger transactions.
Dan White is a licensed Virginia real estate agent at Pearson Smith Realty and founder of FreeDealCalc.com. He has been investing in Northern Virginia real estate for 20+ years.