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Call (916) 436-3776Multifamily (5+ Units) San Diego County
How Do I Buy or Sell a 5+ Unit Apartment Property in San Diego County?
In San Diego County, a 5+ unit apartment property is commercial real estate: it's financed with commercial loans and valued off net operating income and the cap rate, not comparable home sales. It's a premium market, cap rates run tight, roughly 4.75 to 5.25% in 2026, reflecting strong fundamentals (vacancy around 4%), so pricing rewards careful NOI underwriting. Financing ranges from agency loans to commercial DSCR and bridge. Serve First underwrites and brokers the deal; Ashlar Lending arranges the financing; Ashlar LDA prepares the entity.
San Diego County multifamily snapshot (2026)
4.75 to 5.25%
Typical multifamily cap rate (2026)
5+ = commercial
Above 4 units, it's commercial financing
~4% vacancy
Tight San Diego fundamentals
NOI-based value
Priced on income, not home comps
Figures reflect 2026 market conditions and change over time. Serve First Realty is a licensed California real estate brokerage, not a lender or law firm. Cap rates and loan terms vary by property, submarket, and underwriting. This is general information, not tax advice.
How a San Diego County multifamily deal actually works
A 5+ unit building is bought and sold as an income stream. Here's how the pieces fit, with Serve First on the deal, Ashlar Lending on the commercial financing, and Ashlar LDA on the entity:
Understand why 5 units changes everything
Conventional residential loans stop at four units. At five and up, you're in commercial territory: the lender underwrites the property's income, the rent roll, vacancy, and operating expenses that produce net operating income (NOI), plus your experience, not just your personal income. The building stands on its own numbers, which is what makes multifamily scalable.
Value it off cap rate and NOI
Multifamily value is essentially NOI divided by the market cap rate. In premium San Diego County submarkets, cap rates run tight (around 4.75 to 5.25% in 2026), meaning buyers pay more per dollar of income because fundamentals are strong. A lower cap rate is a higher price; a higher cap rate is cheaper but usually higher-risk or secondary-market. Serve First underwrites the real NOI so you're not overpaying on inflated pro formas.
Match the right commercial loan
Financing options include agency loans (Fannie Mae Small Loans, Freddie Mac SBL: competitive, often non-recourse, with debt-service-coverage minimums around 1.20 to 1.25x), commercial DSCR loans (common for 5 to 8 unit deals, typically 70 to 75% LTV), portfolio/bank loans, and bridge loans for value-add or timing. Ashlar Lending structures leverage to the deal and your goals.
Underwrite debt-service coverage carefully
Lenders size the loan so the property's NOI comfortably covers the debt payment, the debt-service coverage ratio (DSCR). 2026 brought slightly tighter underwriting as new operating-cost rules and softening rents compressed margins, so realistic expense and vacancy assumptions matter. In rent-controlled buildings, lenders may underwrite to current (capped) rents rather than market, which affects how much you can borrow.
Hold it in the right entity
Investors typically hold multifamily in an LLC or similar entity for liability separation and cleaner books. Ashlar LDA can prepare the entity formation paperwork and deeds at your direction. Strong institutional and private investor demand keeps this a competitive market. For the tax mechanics of trading up tax-deferred, 1031 exchanges, depreciation, cost segregation, see our landlord guide and confirm specifics with your CPA.
Underwrite the real numbers, not the seller's pro forma. Multifamily is priced on income, so a seller's optimistic rent and expense projections can inflate the asking price by a lot. Insist on the actual rent roll, trailing operating statements, and realistic vacancy, and factor in 2026's tighter operating costs. Serve First underwrites to real numbers so your offer, and Ashlar Lending's loan sizing, rest on what the building actually earns.
One family. Deal, financing, and entity.
Buy or sell the building, with commercial financing built in
A 5+ unit property is an income-producing business, financed and analyzed differently from a house. The Ashlar Brands family works it end to end:
- Serve First Realty sources multifamily deals, underwrites the rent roll and net operating income, and represents you on the buy side or the sale, pricing off cap rate and income, not comparable home sales.
- Ashlar Lending Inc. (NMLS #2699657) arranges the commercial financing 5+ units require: agency (Fannie/Freddie small-balance), commercial DSCR, portfolio, and bridge loans, underwriting the property’s cash flow and structuring leverage to the deal.
- Ashlar LDA, Inc., a bonded and registered Legal Document Assistant, can prepare the LLC or entity paperwork that typically holds the asset, plus deeds, at your direction.
These are separate businesses in the Ashlar Brands family. Serve First is a real estate brokerage, not a lender or law firm; loan terms are set by the lender. A Legal Document Assistant prepares documents at your direction and is not a substitute for an attorney. This is general information, not tax advice: consult your CPA on 1031, depreciation, and recapture.
Buying or selling San Diego County multifamily: the steps
Get pre-underwritten for financing
Ashlar Lending reviews your goals and the loan programs you qualify for, agency, DSCR, bridge, so you shop with a real budget and credible proof of funds.
Underwrite target buildings
Serve First analyzes the rent roll, expenses, and NOI of San Diego County properties, pricing them off realistic cap rates so you pursue deals that actually pencil.
Structure the loan and entity
Ashlar Lending sizes the commercial loan to the property's cash flow; Ashlar LDA prepares the LLC and deeds at your direction.
Close, operate, or reposition
Close the purchase, then hold for cash flow, reposition to raise NOI, or, when you sell, let Serve First market it to investors off its income.
Frequently asked questions
Why is a 5-unit property financed differently than a 4-unit?
Because four units is the ceiling for conventional residential financing. At five or more, the property is commercial: lenders underwrite the building's income (rent roll, vacancy, operating expenses, and the resulting NOI) and your experience, rather than treating it like a home loan based on your personal income. It's a different loan world, agency, DSCR, portfolio, and bridge programs, which is exactly where Ashlar Lending helps.
What is a cap rate and why does it matter?
The capitalization rate is a property's net operating income divided by its price, the market's expected unleveraged yield. Value is essentially NOI divided by the cap rate, so in premium submarkets where cap rates are low (around 4.75 to 5.25% in 2026), buildings cost more per dollar of income because demand and fundamentals are strong. Higher cap rates mean cheaper prices but usually more risk. Serve First underwrites the real NOI behind the cap rate.
What kind of loan do I need for 5+ units?
A commercial loan. Common options are agency loans (Fannie Mae Small Loans, Freddie Mac SBL, often non-recourse, with DSCR minimums around 1.20 to 1.25x), commercial DSCR loans (frequent for 5 to 8 unit deals, typically 70 to 75% LTV), portfolio/bank loans, and bridge loans for value-add plays. The right one depends on the property, your plan, and the numbers. Ashlar Lending structures it.
How does rent control affect buying an apartment building?
It can affect both value and financing. Where rent is capped, lenders may underwrite to current rents instead of market rents, which lowers the income the loan is sized against and can reduce how much you can borrow. It also limits how quickly you can raise NOI. It doesn't make a building a bad buy, but it must be underwritten honestly, which is part of what Serve First does before you offer.
Can I defer taxes when trading up to a larger building?
Often, through a 1031 exchange, which lets you defer capital gains and depreciation recapture by reinvesting proceeds into a like-kind property within strict deadlines. It's a powerful way to scale from a smaller building into a larger one. The mechanics are detailed and time-sensitive, so see our landlord guide for the framework and confirm your specific situation with a CPA and qualified intermediary.
Investing in San Diego County multifamily?
Serve First Realty Inc. is a licensed California real estate brokerage that underwrites and brokers multifamily investment property across San Diego County.
California DRE# 02133513
Multifamily guides for nearby areas
Or start with the statewide overview: Buying & Selling Multifamily (5+ Units) in California.
More guides for this area: all San Diego County real estate guides.