I’m Michael DiVita — DRE #01372066 | NMLS #241655, DiVita Home Finance (DRE #01818285 | NMLS #323700), Tiburon, CA. I’ve been in California mortgage lending since 2000 and founded DiVita Home Finance in 2007. Multi-unit house hacking is one of the best entry points into California real estate — the rental income offset changes the math significantly. Call (800) 239-1103.
Financing a California duplex, triplex, or fourplex (2–4 unit property) unlocks one of the most powerful wealth-building strategies in real estate: live in one unit and have tenants pay your mortgage. Here’s exactly how the financing works.
Owner-Occupied Multi-Unit Financing
When you live in one unit of a 2–4 unit property, you qualify for owner-occupied financing — the same loan types available for a single-family home, with dramatically better terms than investor financing.
FHA loans on 2–4 units: Down payment as low as 3.5%; credit score 580+; lenders will count 75% of projected rental income from the other units to help you qualify. FHA loan limits for 2–4 unit properties in California high-cost counties go significantly above the single-family limit.
Conventional loans on 2–4 units: 5% down on duplexes (owner-occupied); 15% down on triplexes/fourplexes; 75% of market rents from non-occupied units count as income for DTI. Conforming limits for 2–4 unit properties in high-cost California counties are substantially higher than single-family limits — call me for current 2026 limits by county.
VA loans on 2–4 units: Zero down payment; must live in one unit. Rental income from other units can offset DTI. This is a massive advantage for veteran buyers — 0% down on an income-producing property in California.
Rental Income Calculation
For owner-occupied multi-unit purchases, lenders use 75% of market rent from the non-occupied units. If you’re buying a duplex in Marin County, and the non-occupied unit rents for $2,800/month, the lender counts $2,100/month as income toward your DTI. This dramatically increases your purchasing power — in some cases enough to qualify for a purchase price $200,000–$400,000 higher than a single-family home of the same cost.
Non-Owner Investment Purchases
If you’re not living in the property, investment property financing applies: typically 20–25% down; rates that run 0.5–0.875% above owner-occupied pricing; and DTI must work with a more conservative rental income treatment. DSCR loans are a strong alternative for investors — no personal income required if rents cover the mortgage payment. See: DSCR loan guide.
California Multi-Unit Market Considerations
2–4 unit properties are increasingly scarce in Bay Area markets due to limited supply and persistent demand from both investors and owner-occupants. They typically sell at a premium over comparable single-family homes, but the rental income offset makes them accessible to buyers who couldn’t qualify for an SFR of the same purchase price. Marin County duplexes are rare — when one comes to market, competition is intense. Pre-underwriting is essential.
Frequently Asked Questions — Duplex & Multi-Unit Mortgage California
How much down payment do I need to buy a duplex in California?
For owner-occupied purchases (you live in one unit), FHA requires just 3.5% down on a duplex with a 580+ credit score. Conventional owner-occupied duplexes require 5% down; triplexes and fourplexes require 15% down. VA loans allow 0% down for eligible veterans on 2–4 unit owner-occupied properties. For investment purchases where you won’t live in the property, plan on 20–25% down. The dramatic difference in down payment requirements is one of the strongest arguments for the house hacking strategy — use an FHA or VA loan to enter the market at a fraction of the investment property down payment.
Can rental income from the other units help me qualify for the mortgage?
Yes — for owner-occupied 2–4 unit purchases, lenders count 75% of market rents from the non-occupied units as income toward your debt-to-income ratio. If you’re buying a triplex and the two tenant units rent for $2,500/month each ($5,000 total), the lender counts $3,750/month as qualifying income. This can meaningfully increase the loan amount you qualify for. On FHA loans, lenders use either actual rents from existing tenants or 75% of market rents as determined by the appraisal. I model both scenarios upfront to show you exactly how the rental income affects your qualifying amount at specific purchase prices.
What’s the difference between house hacking a duplex and a standard investment property loan?
The difference is significant on every dimension. Owner-occupied 2–4 unit financing (where you live in one unit) offers down payments as low as 3.5% (FHA) or 5% (conventional), owner-occupied interest rates, and full rental income offset for DTI. Investment property financing (no owner occupancy) requires 20–25% down, carries rates 0.5–0.875% higher, and applies more conservative rental income treatment. The owner-occupancy requirement is real — lenders verify intent at closing and through post-closing occupancy audits. The strategy is to genuinely live in one unit, which most house hackers do while building equity and letting tenants offset the mortgage payment.
Talk to Michael Directly
DiVita Home Finance | Tiburon, CA | In lending since 2000, founded DiVita Home Finance in 2007. Michael DiVita DRE #01372066 | NMLS #241655. Company DRE #01818285 | NMLS #323700.
💬 Text: (310) 849-9124
