# House Hacking in San Carlos (94070): The strongest catalyst stack against the hardest price · The Rent Hacker > San Carlos 94070 for house hackers: The strongest catalyst stack in what was the B block: Alexandria's life-science mega campus, two built TODs, and electrifi Canonical: https://therenthacker.com/house-hacking/san-carlos-94070/ Source: The Rent Hacker (https://therenthacker.com/). License: RSL, attribution required — https://therenthacker.com/license.xml --- [Peninsula guide](/house-hacking/peninsula/) · Tier A · Rank #13 of 28 # House hacking in San Carlos (Citywide, ECR + Industrial Rd corridors). The strongest catalyst stack in what was the B block: Alexandria's life-science mega campus, two built TODs, and electrified in-ZIP Caltrain, promoted to A in July 2026 against the metro's hardest price at a ~$2.7M median. **Status check:** Promoted B to A on 2026-07-16: the City Council approved a substantial new expansion phase in 2026 (25 acres, 3 phases over 15 years, a $43M community-benefit package), well beyond the earlier two-built-TODs framing, and Vaxcyte signed a 10-year lease renewal. All three jurors held it short of S on the ~$2.7M median. This ZIP was B-tier at synthesis, so it carries less narrative depth than the others; its Section 8 underwriting row is absent from the index and none is invented here. ## What's actually happening in 94070 - Operating, expansion entitled Alexandria Center for Life Science mega campus: ~739K RSF operating at 97.4% occupancy (Vaxcyte, CARGO), with a ~2.1M RSF future program and an entitled ~25-acre District for Science and Technology. [SM Daily Journal](https://www.smdailyjournal.com/news/local/alexandria-life-science-campus-project-approved-in-san-carlos/article_cdb61d0d-e85d-4dad-a175-5fb8ff0798e4.html) - Approved 2026 New 2026 approval at 987 Commercial St: a 25-acre, 3-phase campus on a 15-year horizon with a $43M community-benefit package; anchor tenant Vaxcyte signed a 10-year, ~260,000 sq ft lease renewal. [BioSpace](https://www.biospace.com/alexandria-real-estate-equities-is-moving-forward-with-san-carlos-biotech-campus) - Delivered / approved Two built TODs, Trestle (202 units) and Wheeler Plaza (109 condos), plus electrified in-ZIP Caltrain and 251 approved units at 11 ECR. City of San Carlos ## The numbers Median price ~$2.7M (Redfin, +3.8% YoY) Market rent not found at ZIP level (San Mateo city / county-band proxy, flagged in the index) Property tax (San Mateo County) 1.26% combined effective average (range 1.08–1.52% by tax-rate area; purchase resets the assessed basis to sale price) Per-bed rent band No published band (see rationale) ADU rent band No published band Whole-home rent band No published band Underwriting vacancy No published band Appreciation scenarios No published band The metro's hardest price; the index graded it B on affordability until the 2026-07-16 promotion. Appreciation basis: The index's Section 8 table predates the 2026-07-16 promotion and carries no 94070 row; bands stay unpublished until the next full synthesis rather than being invented. Rent bands are city-level medians; confirm the specific parcel before trusting any of them. [Run your own scenario in the calculator](/calculator/). ## Buildings we underwrote in 94070 2 buildings in 94070 carry a record. 0 beat renting and index funds; the rest did not. Every row links to its own page, with the numbers it was scored on. Property At our defaults Status [577 Laurel St](/property/rh-3sg5ft/577-laurel-st/) 5 units · $4,200,000 −$3,850,741 S&P 500 Underwritten — the index wins at our defaults [64 Laurel St](/property/rh-9kauf0/64-laurel-st/) 2 units · $5,500,000 −$6,053,040 S&P 500 Underwritten — the index wins at our defaults The full [board](/board/) shows every region's current week; this table is every record we hold for 94070, newest basis first. ## The house-hack angle A durable-appreciation watch ZIP more than a base-case hack: the median keeps most entries from beating the S&P, so any real play lives in the ECR, downtown, and Industrial Rd condo and TOD pockets. Hillside geotech limits ADU feasibility on the west side. ## What breaks it - Price: a ~$2.3–2.7M median is the metro's hardest, and all three refresh jurors held the ZIP short of S on exactly that - Ground-up multi-unit is confined to ECR, downtown, and Industrial Rd; White Oaks and Howard Park lots run small (~5,000 sq ft) with strong preservation pressure - Hillside geotech limits ADU feasibility This page is the standing analysis. The weekly part, actual San Carlos-area listings that pass the math, lands on the Peninsula board every Thursday. [This week's Peninsula board](/board/sf-peninsula/) [This week's Peninsula board](/board/sf-peninsula/) · [Read past Peninsula issues](/issues/sf-peninsula/) · [Every pick, on the record](/track-record/) · [How a deal becomes a pick](/methodology/) Data synthesized 2026-07-05, catalysts re-verified 2026-07-16. Mortgage-rate basis: 6.43% (Freddie Mac PMMS, week of 2026-07-02). Sources are the public planning documents and market listings named above, fetched on the synthesis date. Nothing here is investment advice; every deal needs a bindable insurance quote and parcel-level verification.