{"asOf":"2026-07-24T03:49:35.287Z","block":"800-899 MOUNTAIN ST","blockUrl":"https://philadelphia.blockreport.homes/block/800-899-mountain-st","address":"821 MOUNTAIN ST","parcelNumber":"012305000","source":"https://property.phila.gov/?p=012305000","ownerType":"owner-occupied","kind":"house","isHouse":true,"home":true,"commercial":false,"residential":true,"taxExempt":false,"institutional":false,"buildingCode":"O50","buildingCodeNew":"25","buildingClass":"ROW 3 STY MASONRY","buildingClassNew":"ROW MODERN","useLabel":"House","owner":"WELCH PATRICK","coOwner":"WELCH FIONA","marketValue":482800,"landAssessment":96560,"improvementAssessment":386240,"livableArea":1800,"yearBuilt":2014,"lastSale":{"price":487500,"date":"2025-09-25T04:00:00Z"},"openViolations":0,"violations":[{"number":"2543010","date":"2012-08-17","code":"CP-01","title":"CLIP VIOLATION NOTICE","status":"COMPLIED","resolutionDate":null,"resolution":null},{"number":"2543011","date":"2012-08-17","code":"PM-306.0/2","title":"VACANT LOT STANDARD","status":"COMPLIED","resolutionDate":null,"resolution":null}],"violationCases":[{"number":"344862","type":"STANDARD","priority":"STANDARD","responsibility":"CLIP","status":"CLOSED","createdDate":"2012-08-17","completedDate":"2012-08-29","violations":[{"number":"2543010","date":"2012-08-17","code":"CP-01","title":"CLIP VIOLATION NOTICE","status":"COMPLIED","resolutionDate":null,"resolution":null},{"number":"2543011","date":"2012-08-17","code":"PM-306.0/2","title":"VACANT LOT STANDARD","status":"COMPLIED","resolutionDate":null,"resolution":null}]}],"violYears":[{"y":2012,"n":2,"worst":null}],"investigations":[],"taxOwed":0,"taxSnapshot":{"available":true,"asOf":"2022-06","matched":false},"taxDelinquencySnapshotAsOf":"2022-06","taxDelinquencySnapshotAvailable":true,"lat":39.92860702230051,"lng":-75.15934105629302,"geom":{"type":"Polygon","coordinates":[[[-75.159299783,39.928667628],[-75.159327415,39.9285376],[-75.159382073,39.928544493],[-75.159353836,39.928676651],[-75.159299783,39.928667628]]]},"liDistrict":"SOUTH","certifications":[],"cityRecordAvailability":{"violations":true,"investigations":true,"appeals":true,"certifications":true,"permits":true,"licenses":true},"zip":"19148","beds":3,"baths":2,"stories":3,"lotArea":761,"zoning":"RSA5","grade":"C","basement":"A","heater":"A","centralAir":true,"extCond":"3","intCond":"3","garage":null,"homestead":true,"mail":"821 MOUNTAIN ST, PHILADELPHIA PA, 19148","mailOut":false,"appeals":[],"taxYears":[],"taxNet":0,"taxLien":false,"taxLedgerThrough":2016,"taxLedgerAvailable":true,"timesSold":3,"abated":false,"assessmentExemption":false,"exemptionBasisVerified":false,"valueSeries":[{"y":2016,"v":13300,"taxable":13300,"land":13300,"improvement":0,"taxableLand":13300,"taxableImprovement":0,"exemptLand":0,"exemptImprovement":0},{"y":2017,"v":55600,"taxable":55600,"land":55600,"improvement":0,"taxableLand":55600,"taxableImprovement":0,"exemptLand":0,"exemptImprovement":0},{"y":2018,"v":300000,"taxable":45000,"land":45000,"improvement":255000,"taxableLand":45000,"taxableImprovement":0,"exemptLand":0,"exemptImprovement":255000},{"y":2019,"v":394400,"taxable":59160,"land":59160,"improvement":335240,"taxableLand":59160,"taxableImprovement":0,"exemptLand":0,"exemptImprovement":335240},{"y":2020,"v":427400,"taxable":64110,"land":64110,"improvement":363290,"taxableLand":64110,"taxableImprovement":0,"exemptLand":0,"exemptImprovement":363290},{"y":2021,"v":427400,"taxable":64110,"land":64110,"improvement":363290,"taxableLand":64110,"taxableImprovement":0,"exemptLand":0,"exemptImprovement":363290},{"y":2022,"v":427400,"taxable":64110,"land":64110,"improvement":363290,"taxableLand":64110,"taxableImprovement":0,"exemptLand":0,"exemptImprovement":363290},{"y":2023,"v":535500,"taxable":107100,"land":107100,"improvement":428400,"taxableLand":107100,"taxableImprovement":0,"exemptLand":0,"exemptImprovement":428400},{"y":2024,"v":535500,"taxable":214200,"land":107100,"improvement":428400,"taxableLand":107100,"taxableImprovement":107100,"exemptLand":0,"exemptImprovement":321300},{"y":2025,"v":468400,"taxable":368400,"land":93680,"improvement":374720,"taxableLand":93680,"taxableImprovement":274720,"exemptLand":0,"exemptImprovement":100000},{"y":2026,"v":468400,"taxable":468400,"land":93680,"improvement":374720,"taxableLand":93680,"taxableImprovement":374720,"exemptLand":0,"exemptImprovement":0},{"y":2027,"v":482800,"taxable":382800,"land":96560,"improvement":386240,"taxableLand":96560,"taxableImprovement":286240,"exemptLand":0,"exemptImprovement":100000}],"taxNow":6557,"familyHeld":false,"lastTransferNominal":false,"permits":[{"number":"438220","date":"2013-01-10","work":"Zoning/use","type":"ZP_ZON/USE","description":"ZONING/USE PERMIT","status":"COMPLETED","completedDate":"2013-01-10","scope":"FOR THE ERECTION OF AN ATTACHED STRUCTURE WITH CELLAR (HEIGHT NOT EXCEED 38 FEET). (SIZE AND LOCATION AS SHOWN IN THE APPLICATION/PLAN)."},{"number":"451139","date":"2013-04-18","work":"New construction","type":"BP_NEWCNST","description":"NEW CONSTRUCTION PERMIT","status":"COMPLETED","completedDate":"2014-06-12","scope":"ERECTION OF AN ATTACHED THREE STORY SINGLE FAMILY DWELLING WITH A CELLAR AND ROOF DECK ABOVE THE SECOND STORY AS PER SUBMITTED SEALED PLAN. PLUMBING, ELECTRICAL, MECHANICAL, AND FIRE SUPPRESSION WORK REQUIRES ADDITIONAL PERMITS. CALL THE INSPECTOR PRIOR TO STARTING WORK."},{"number":"484348","date":"2013-07-19","work":"Plumbing","type":"PP_PLUMBNG","description":"PLUMBING PERMIT","status":"COMPLETED","completedDate":"2014-06-09","scope":"INSTALL NEW DRAIN LINES 3-TOILETS, 3-LAVS, 2-TUBS, 1KIT SINK, 1-LAUNDRY &NEW LATERAL, 4\"HOUSE DRAIN 3/4\" WATER DIST LINE & INSTALL WATER LINE TO FIXTURES (SFD) PA20132000653 *AMEND PERMIT 481402*"},{"number":"494696","date":"2013-09-13","work":"New Construction","type":"Electrical","description":"Electrical Permit","status":"Completed","completedDate":"2022-04-04","scope":"200AMP SERVICE,WIRING THROUGHOUT (SFD) AS PER NEC 2008"},{"number":"498194","date":"2013-10-02","work":"Mechanical","type":"BP_MECH","description":"MECHANICAL PERMIT","status":"COMPLETED","completedDate":"2014-06-09","scope":"INSTALLATION OF 2 HEAT PUMP SYSTEMS (INCLUDING DUCTWORK/ASSOCIATED ACCESSORIES). SINGLE FAMILY DWELLING (SELF-CONTAINED)"},{"number":"507400","date":"2013-12-24","work":"Suppression","type":"BP_FIRESUP","description":"SUPPRESSION PERMIT","status":"COMPLETED","completedDate":"2014-06-12","scope":"INSTALL NFPA 13D SPRINKLER SYSTEM WITH 1\" COMBINED FEED SERVING RESIDENTIAL BLDG."},{"number":"554665","date":"2014-08-08","work":"Plumbing","type":"PP_PLUMBNG","description":"PLUMBING PERMIT","status":"COMPLETED","completedDate":"2014-08-15","scope":"INSTALL 1\" WATER DIST LINE (SFD) PA20142190175 SELF-CERIFICATION'S ARE NO LONGER PERMITTED - ALL EXCAVATIONS & PLUMBING TRENCHES IN EXCESS OF 5' IN DEPTH MUST HAVE APPROVED SHORING IN PLACE AT THE TIME OF INSPECTION"}],"storyTag":"New construction","storyDelta":0.63,"timeline":[{"y":2012,"k":"viol","w":"2 L&I violations"},{"y":2012,"k":"land","p":32500},{"y":2013,"k":"permit","w":"Zoning/use"},{"y":2013,"k":"permit","w":"New construction"},{"y":2013,"k":"permit","w":"Plumbing"},{"y":2013,"k":"permit","w":"New Construction"},{"y":2013,"k":"permit","w":"Mechanical"},{"y":2013,"k":"permit","w":"Suppression"},{"y":2014,"k":"permit","w":"Plumbing"},{"y":2014,"k":"sale","p":299900},{"y":2025,"k":"sale","p":487500}],"rented":false,"licenses":[],"licenseActivity":[],"businessLicenseSourceDate":"2026-07-23","signals":[{"kind":"permit-mismatch","level":"watch","title":"Assessment/permit mismatch","summary":"The assessment jumped 25% in 2023, but no matching permit appears in the property timeline.","evidence":["assessment moved from $427,400 to $535,500","no permit shown in 2022-2024"],"caveat":"Not proof of unpermitted work; reassessment, corrected data, or a permit under another parcel can also explain it."}],"legalChecks":[{"id":"use-occupancy","level":"attention","title":"Zoning approval is not the occupancy file","finding":"Use permit #438220: COMPLETED.","why":"Philadelphia says a zoning approval or Property Sales Certification can identify a use without proving that it was established under the Building Code. A change of use, unit count, exits, or fire rating can require a Building Permit and Certificate of Occupancy.","action":"Verify the lawful use, unit count, associated construction permits, and Certificate of Occupancy with L&I.","url":"https://www.phila.gov/services/permits-violations-licenses/get-a-certificate/get-a-certificate-of-occupancy/"},{"id":"homestead","level":"verify","title":"Homestead is tied to owner occupancy and the deed","finding":"OPA shows the Homestead Exemption.","why":"Philadelphia limits Homestead to an owner’s primary residence. The City says a deed change can require a new application or update.","action":"A buyer should apply in their own name and not assume the seller’s benefit continues.","url":"https://www.phila.gov/documents/homestead-exemption-application/"},{"id":"violations","level":"clear","title":"No open violation; closed history remains relevant","finding":"The fetched record shows 0 open and 2 historical violations across 1 case.","why":"A closed case is materially better than an open one, but it does not by itself prove that every altered use, unit, or concealed condition matches today’s approvals.","action":"Use the closed cases to target the inspection and occupancy-file review.","url":"https://www.phila.gov/departments/department-of-licenses-and-inspections/inspections/violation-and-order-types/"}],"closingChecks":[{"title":"Property Sales Certification","body":"The seller must obtain Philadelphia’s certificate showing the base zoning, last use in the zoning record, and open violations. The City warns that it does not prove Building Code occupancy or show zoning overlays.","action":"Obtain the fresh certificate and compare it with the CO, permits, and Atlas overlays.","url":"https://www.phila.gov/services/permits-violations-licenses/get-a-certificate/get-a-property-sales-certification/"},{"title":"Date-effective City Property Payoff","body":"The Tax Center Property Payoff covers Real Estate Tax, Commercial Trash, and L&I abatement-work invoices. Philadelphia says it does not include business-tax debts or liens, water and sewer charges, or fines for code violations.","action":"Request the City statement effective through settlement; read every period and invoice.","url":"https://www.phila.gov/guides/philadelphia-tax-center/what-to-do/"},{"title":"Professional title and water-lien searches","body":"OPA ownership, deed summaries, and a zero tax balance are not clear title. Mortgages, judgments, municipal claims, water liens, easements, heirs, and other encumbrances require separate searches.","action":"Use a Pennsylvania lawyer/title company and obtain owner’s title insurance; order the separate water search/payoff.","url":"https://www.phila.gov/2026-04-07-why-title-insurance-is-your-best-friend-when-buying-a-home-in-philadelphia/","secondaryUrl":"https://www.phila.gov/services/water-gas-utilities/pay-or-dispute-a-water-bill/resolve-water-liens-judgments/"},{"title":"Seller-specific tax relief is not the buyer’s bill","body":"LOOP and low-income or senior Real Estate Tax freezes depend on the qualifying owner and continued program eligibility; a buyer cannot assume the seller’s capped or frozen bill continues. A separately verified property abatement often remains with the property for its remaining term, but program-specific new-owner filing, use, and tax-compliance conditions still must be confirmed—not inferred from the reduced assessment alone.","action":"Have Revenue or OPA identify every current benefit, model the buyer’s bill without seller-specific relief, and confirm any verified abatement in writing.","url":"https://www.phila.gov/services/payments-assistance-taxes/payment-plans-and-assistance-programs/income-based-programs-for-residents/apply-for-the-longtime-owner-occupants-program-loop/","secondaryUrl":"https://www.phila.gov/services/payments-assistance-taxes/taxes/property-and-real-estate-taxes/get-real-estate-tax-relief/tax-freeze/"},{"title":"Seller disclosure and independent inspections","body":"For a covered Pennsylvania residential transfer, obtain the statutory seller disclosure. It reports the seller’s knowledge; it is not a warranty, title search, code review, or substitute for inspections.","action":"Have the agreement and disclosure reviewed for this transaction’s coverage and exceptions.","url":"https://www.pa.gov/agencies/dos/department-and-offices/bpoa/boards-commissions/real-estate-commission"}]}