# 628 Kentucky St · The Rent Hacker > Underwriting record for 628 Kentucky St (North Bay): the published verdict at The Rent Hacker's defaults, plus a calculator that reruns it at your numbers. Canonical: https://therenthacker.com/property/rh-nbtz9c/628-kentucky-st/ Source: The Rent Hacker (https://therenthacker.com/). License: RSL, attribution required — https://therenthacker.com/license.xml --- Rejected # 628 Kentucky St This one never reached the math. What stopped it is below. 94590 · North Bay The listing states the per dwelling mix: the front building holds an extra large 2 bedroom house and a 1 bedroom unit, and the back building holds two 2 bedroom units. The run read the mix as unstated and split the 8 bedrooms evenly as 2+2+2+2, pricing four 2 bedroom dwellings.Re derived at the stated mix, with the 1 bedroom unit priced at the 94590 1 bedroom band, the cautious case loses to the index at a breakeven of 9.2 years, so this row does not beat renting and index funds. Underwritten as of 2026-09-28 · record v18 We have no verdict for this one at our defaults. [Run your own numbers on any building →](/calculator/) Your numbers are not available on this record yet. ## Why we rejected it - The listing states the per dwelling mix: the front building holds an extra large 2 bedroom house and a 1 bedroom unit, and the back building holds two 2 bedroom units. The run read the mix as unstated and split the 8 bedrooms evenly as 2+2+2+2, pricing four 2 bedroom dwellings. - Re derived at the stated mix, with the 1 bedroom unit priced at the 94590 1 bedroom band, the cautious case loses to the index at a breakeven of 9.2 years, so this row does not beat renting and index funds. Rejected when we checked the listing itself. [Open these numbers in the calculator →](/calculator/#i=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) Every slider starts at this page's inputs; change any of them and the verdict re-runs at yours. ## Property facts Asking price $895,000 Units 4 Beds / baths 8 / 4 Square feet 3,248 Year built 1900 Property type Multi-Family Unit count verified: 4 units, corroborated by the listing itself. ## If the market turns Modeled appreciation is an assumption, so we replayed this deal against history: every 10-year window in the federal house-price index for Solano County (41 windows), each one swapping its actual price path in for our modeled appreciation. History replay Years Ends vs the never-buy path Worst window 1989→1999 −$462,162 Median window 1999→2009 +$310,632 Best window 1996→2006 +$1,697,330 13 of the 41 windows ended behind the never-buy path. Replay the 2008 crash as it hit this area and the deal ends year 10 $687,099 behind the never-buy path; the deepest point comes in year 7, $731,098 behind. These windows track Solano County as a whole. Within the county, individual ZIPs' realized 10-year outcomes typically differed from the county's by about ±0.6 points/yr — one zip-decade in ten differed by ±2.2 points/yr or more, and the largest gap since 1977 was 3.7 points/yr. A specific building varies more than its ZIP, not less. ## Where these numbers come from Of the 10 inputs behind this analysis, 5 trace to evidence (our listing feed, area comps, county records); 2 are standing conventions; 1 is derived from other inputs. - **Purchase price**: our listing feed · corroborated - **Rent while you live in one unit**: area rent comps and research bands · single source - **Rent after you move out**: an unclassified source · no independent witness - **The rent you would pay on the never-buy path**: area rent comps and research bands · single source - **Property tax rate**: local rent regulation · single source - **Unit count**: our listing feed · corroborated A standing convention is a deliberate modeling choice we apply to every deal. We flag it rather than dress it up as evidence. ## What we could not verify - The verdict: we never had enough on this property to run the numbers, so there is nothing here to set against the S&P, and nothing to re-run with your own figures. Members on a paid plan can request verification. ## Want this for an address you pick? Every week we underwrite this metro’s 2-4 unit listings against the S&P and publish the [whole board](/board/), with the reason on every one we rejected. [Or look up a specific San Francisco address](/lookup/) ## Want this analysis for another address? Any San Francisco address, underwritten the same way — cautious rents, the registry, the S&P line. [Underwrite an address →](/lookup/) A full report like this one, for an address you pick: Underwrite an address — $79, delivered within one business day. Record v18 Next ## This is one row of the North Bay board. The run of September 28, 2026 put every two-to-four-unit listing in North Bay through the same comparison. The rest of the board, losers and rejections included, is one page. [See the North Bay board](/board/sf-north-bay/) [Underwrite one address for $79](/lookup/#underwrite) [Take the pass, $49/mo](/checkout/?tier=pass&r=nb) In our guide to house hacking Vallejo: [Downtown / Mare Island (94590)](/house-hacking/vallejo-94590/) · [North Bay guide](/house-hacking/north-bay/)