Published · By Jeff Brick, 2026 SDMLS President
Quick answer: Commercial real estate (office, retail, industrial) offers longer leases and steadier income, while residential investment property in San Diego (condos, small multifamily, homes with an ADU) offers easier financing, deep tenant demand and lower entry prices. In September 2026 the median San Diego condo or townhome sold for $670,000 versus $1,079,000 for a detached home, and the city’s average apartment rent was $3,046, which is why many local investors start with attached homes or an ADU before moving into commercial.
Investors ask me all the time whether they should buy commercial or residential in San Diego. Both can build long-term wealth. The right choice depends on how much capital you have, how hands-on you want to be and how much vacancy risk you can carry. Here is how I think about it.
What commercial real estate does well
- Longer leases and steady income. Office, retail and industrial tenants often sign multi-year leases, which can mean more predictable cash flow than month-to-month residential rentals.
- Diversification. Commercial property can balance a portfolio of stocks, bonds and residential holdings.
- Tenant-paid expenses. Many commercial leases pass taxes, insurance and maintenance through to the tenant.
- Tax benefits. Like residential property, commercial owners can typically deduct mortgage interest, management, repairs and depreciation. Confirm the details with your CPA.
The tradeoffs are real: larger down payments, tougher financing, and vacancies that can last months instead of weeks. Location and tenant quality matter more than almost anything else.
Why many San Diego investors start residential
San Diego has split into two markets. Houses are tight and expensive; condos and townhomes have more supply, more negotiating room and a much lower entry price.
San Diego MLS · September 2026
Detached vs. attached for investors
Rents also vary a lot by neighborhood, from about $3,965 in Bankers Hill / Park West and $3,561 in Little Italy to $2,270 in Ocean Beach. I compare the numbers side by side in The San Diego condo gap: a guide for investors, and each area has its own guide, including Bankers Hill, Little Italy, Downtown and Mission Valley.
Adding units: the ADU path
Accessory dwelling units have become a major part of San Diego’s new housing. ADUs were about one in four new homes permitted in the City of San Diego in 2024, up from 17% in 2021.
City of San Diego · 2021–2024
ADUs as a share of new homes permitted
For many owners, an ADU on a single-family lot is the most practical way into investment property. The rules, costs and value impact are in my San Diego ADU guide. If you are thinking about short-term rentals instead, read San Diego short-term rental rules first, because licenses are limited.
What to look for in any San Diego investment property
- Location and demand: proximity to jobs, transit, the coast and universities drives both rent and resale.
- The numbers at today’s rates: run cash flow at current mortgage rates, not last year’s.
- Condition and HOA health: for condos, check reserves, planned assessments and rental restrictions before you buy.
- Rules: rent control, short-term rental limits and HOA leasing rules all affect returns.
- Your team: lender, inspector, property manager, CPA and attorney. My Approved Vendors directory lists the property managers, inspectors and specialists I trust.
FAQ
Is commercial or residential real estate a better investment in San Diego?
It depends on your capital and risk tolerance. Commercial property can offer longer leases and tenant-paid expenses but needs larger down payments and can sit vacant longer. Residential property in San Diego has easier financing and deep rental demand, with a median condo or townhome price of $670,000 in September 2026.
What is the average rent in San Diego?
RentCafe put the City of San Diego average apartment rent at $3,046 as of Sept. 30, 2026, ranging from about $2,270 in Ocean Beach to $3,965 in Bankers Hill / Park West.
Are ADUs a good investment in San Diego?
For many owners they are a practical way to add a rental unit. ADUs made up about 26% of new homes permitted in the City of San Diego in 2024, and my ADU guide covers the rules, costs and value impact.
Exploring an investment property in San Diego? Reach out and I would be glad to run the numbers with you. Let me know if you have any questions!
Sources: San Diego MLS Monthly Indicators, September 2026; RentCafe San Diego average rent by neighborhood (updated Sept. 30, 2026); City of San Diego 2025 Annual Report on Homes. This is general information, not legal, tax or financial advice.
