{"asOf":"2026-07-08T22:04:51.174Z","block":"4100-4199 TYSON AVE","blockUrl":"https://blockreport.homes/block/4100-4199-tyson-ave","address":"4121 TYSON AVE","parcelNumber":"552195200","source":"https://property.phila.gov/?p=552195200","ownerType":"owner-occupied","owner":"LAM NGAI LAN","marketValue":349800,"livableArea":1700,"yearBuilt":1950,"lastSale":{"price":200000,"date":"2019-04-30T04:00:00Z"},"openViolations":0,"taxOwed":0,"lat":40.0327113900779,"lng":-75.04546180600984,"geom":{"type":"Polygon","coordinates":[[[-75.045225962,40.032751277],[-75.04559782,40.032557141],[-75.0456977,40.032671465],[-75.045325737,40.032865663],[-75.045225962,40.032751277]]]},"zip":"19135","beds":null,"baths":null,"stories":2,"lotArea":6250,"zoning":"RSA3","grade":"C","basement":"H","heater":"H","centralAir":false,"extCond":"4","intCond":"4","garage":1,"homestead":true,"appeals":[],"taxYears":[],"taxNet":0,"taxLien":false,"timesSold":2,"abated":false,"valueSeries":[{"y":2016,"v":182500,"taxable":182500},{"y":2017,"v":182500,"taxable":182500},{"y":2018,"v":182500,"taxable":182500},{"y":2019,"v":215300,"taxable":215300},{"y":2020,"v":224400,"taxable":224400},{"y":2021,"v":224400,"taxable":224400},{"y":2022,"v":224400,"taxable":224400},{"y":2023,"v":271000,"taxable":191000},{"y":2024,"v":271000,"taxable":191000},{"y":2025,"v":377200,"taxable":277200},{"y":2026,"v":377200,"taxable":277200},{"y":2027,"v":349800,"taxable":249800}],"taxNow":3497,"familyHeld":false,"storyTag":"Traded","storyDelta":0.58,"timeline":[{"y":2003,"k":"sale","p":110900},{"y":2016,"k":"sale","p":175000}],"rented":true,"signals":[{"kind":"permit-mismatch","level":"watch","title":"Assessment/permit mismatch","summary":"The assessment jumped 39% in 2025, but no matching permit appears in the property timeline.","evidence":["assessment moved from $271,000 to $377,200","no permit shown in 2024-2026"],"caveat":"Not proof of unpermitted work; reassessment, corrected data, or a permit under another parcel can also explain it."}]}