The starting point is the IRS SOI migration 2022–2023 release: 10,455 tax-return households moved from Los Angeles to San Diego. That corridor represented 5.42% of Los Angeles outbound returns and 15.37% of San Diego inbound returns. Those shares put the count in each metro’s measured migration context. IRS flow means tax-return households; it does not identify renters, every mover or future demand. It is evidence of completed tax-filer movement, not a forecast of San Diego rental demand.
For household housing costs, Zillow ZORI on June 30, 2026 placed Los Angeles asking rent at $2,927 and San Diego at $2,991, a difference of $768 over a year. The FY2026 HUD Fair Market Rent points the other way: San Diego’s two-bedroom standard is $68.50 lower. HUD FMR is a program standard, not a Zillow market-rent observation. The destination’s metro Zillow home-value benchmark, or ZHVI, is also $27,030 lower. The move therefore presents a mixed cost shift: a slightly higher Zillow rent benchmark alongside a lower HUD standard and lower metro home-value benchmark.
For rental-property underwriting, a mechanical gross-yield screen from those June Zillow benchmarks is 3.81% in San Diego versus 3.63% in Los Angeles. In FEMA’s NRI counties (ArcGIS) release, the modeled climate/hazard loss ratio is 0.2446% at the destination and 0.3683% at the origin. Neither metro screen substitutes for a property quote, operating history or acquisition analysis. The next underwriting question is: after property-specific rent, taxes, insurance, maintenance, capital work, vacancy history and debt terms, does the San Diego asset retain an acceptable margin?

