# 2553 Corby Ave · The Rent Hacker > Underwriting record for 2553 Corby Ave (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-23mbjr/2553-corby-ave/ Source: The Rent Hacker (https://therenthacker.com/). License: RSL, attribution required — https://therenthacker.com/license.xml --- Rejected # 2553 Corby Ave This one never reached the math. What stopped it is below. 95407 · North Bay The 95407 rent research states an absence for the 2 bedroom dwelling class and instructs that it must not be underwritten, so this row has no admissible rent basis. The run priced its three 2 bedroom units off the whole home 2 bedroom band, which is a different property class.run-sensitivity refused the derivation on the rent stack gate, so no scenario for this row was produced this week. Underwritten as of 2026-09-28 · record v8 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 95407 rent research states an absence for the 2 bedroom dwelling class and instructs that it must not be underwritten, so this row has no admissible rent basis. The run priced its three 2 bedroom units off the whole home 2 bedroom band, which is a different property class. - run-sensitivity refused the derivation on the rent stack gate, so no scenario for this row was produced this week. 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 $839,980 Units 3 Beds / baths 6 / 3 Square feet 2,100 Year built 1963 Property type Multi-Family Unit count verified: 3 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 Sonoma 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 2005→2015 +$80,034 Median window 1999→2009 +$723,483 Best window 1996→2006 +$1,710,271 None 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 $331,382 behind the never-buy path; the deepest point comes in year 6, $514,094 behind. These windows track Sonoma County as a whole. Within the county, individual ZIPs' realized 10-year outcomes typically differed from the county's by about ±0.3 points/yr — one zip-decade in ten differed by ±0.8 points/yr or more, and the largest gap since 1975 was 2.1 points/yr. A specific building varies more than its ZIP, not less. ## Where these numbers come from Of the 10 inputs behind this analysis, 6 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**: area rent comps and research bands · single source - **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 v8 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)