{
  "address": "4345–4347 20th Street, San Francisco, CA 94114",
  "path": "/san-francisco/castro/20th-street/4345/",
  "apn": "2751021",
  "block": "2751",
  "lot": "021",
  "eas_baseid": "345518",
  "coordinates": {
    "lat": 37.757356,
    "lng": -122.436537
  },
  "address_range": "4345–4347",
  "street_numbers_on_parcel": [
    "4345",
    "4347"
  ],
  "parcel": {
    "year_built": 1910,
    "units": 2,
    "stories": 3,
    "rooms": 10,
    "bathrooms": 3,
    "bedrooms": 5,
    "lot_area_sqft": 2437.5,
    "building_area_sqft": 3000,
    "lot_depth_ft": 97.5,
    "use": "Multi-Family Residential",
    "property_class": "Flats & Duplex",
    "construction_type_code": "D",
    "zoning": "RH-3",
    "supervisor_district": 8,
    "assessor_neighborhood": "Eureka Valley/Dolores Heights",
    "analysis_neighborhood": "Castro/Upper Market",
    "property_location_raw": "4347A4345 20TH                ST0000"
  },
  "assessment": {
    "roll_year": 2025,
    "assessed_land_value": 1574447,
    "assessed_improvement_value": 674760,
    "last_sale_date": "2016-03-21"
  },
  "historic_status": {
    "ceqa_status_code": "B",
    "ceqa_status_code_article_10_11": "B",
    "ceqa_status_label": "Unevaluated",
    "reason": "No evaluation and 45 years or older",
    "yearbuilt": "1910",
    "in_article_10_11_historic_district": false,
    "source": "sf-planning"
  },
  "permits": [
    {
      "number": "202606102904",
      "type": "additions alterations or repairs",
      "status": "triage",
      "filed": "2026-06-10",
      "status_date": "2026-06-10",
      "estimated_cost": 220000,
      "description": "legalization udu on 1/f and addition of state adu at basement lvl. excavate (e) slab and add (n),convert into habitable space. modify front & side elevations, access stairs & add landscaping. new laundry.",
      "source": "sf-building-permits"
    },
    {
      "number": "202604280247",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2026-04-28",
      "status_date": "2026-05-05",
      "estimated_cost": 3500,
      "revised_cost": 3500,
      "description": "to comply with nov# 202653232: repair deck and stairs, <50%, not street visible.",
      "source": "sf-building-permits"
    },
    {
      "number": "202405232836",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2024-05-23",
      "status_date": "2024-11-22",
      "estimated_cost": 94114,
      "revised_cost": 94114,
      "description": "replace (3) windows with retrofit vinyl windows. not street visible. u-factor <0.30.",
      "source": "sf-building-permits"
    },
    {
      "number": "201309247549",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2013-09-24",
      "status_date": "2013-10-03",
      "estimated_cost": 1,
      "revised_cost": 1,
      "description": "to obtain final inspection for work approved under pa#2004-0114-3957. all work is complete.",
      "source": "sf-building-permits"
    },
    {
      "number": "M97604",
      "type": "otc alterations permit",
      "status": "issued",
      "filed": "2007-12-03",
      "status_date": "2007-12-03",
      "revised_cost": 1,
      "description": "street space & sidewalk",
      "source": "sf-building-permits"
    },
    {
      "number": "200404201717",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2004-04-20",
      "status_date": "2004-08-26",
      "estimated_cost": 3500,
      "revised_cost": 3500,
      "description": "remove old tile & replace wth new shower pan in hower rm, relocate whtch for fan lite, install **",
      "source": "sf-building-permits"
    },
    {
      "number": "200401143957",
      "type": "otc alterations permit",
      "status": "expired",
      "filed": "2004-01-14",
      "status_date": "2007-01-02",
      "estimated_cost": 11880,
      "revised_cost": 11880,
      "description": "reroofing",
      "source": "sf-building-permits"
    },
    {
      "number": "200310288777",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2003-10-28",
      "status_date": "2004-01-21",
      "estimated_cost": 38000,
      "revised_cost": 38000,
      "description": "see attached termite report#031144,items#1,2,3,4,5,6,7.",
      "source": "sf-building-permits"
    },
    {
      "number": "9311887",
      "type": "additions alterations or repairs",
      "status": "complete",
      "filed": "1993-07-15",
      "status_date": "1993-12-16",
      "estimated_cost": 7500,
      "description": "horizontal",
      "source": "sf-building-permits"
    },
    {
      "number": "9122454",
      "type": "otc alterations permit",
      "status": "expired",
      "filed": "1991-11-25",
      "status_date": "1992-03-25",
      "estimated_cost": 1634,
      "description": "replace wooden sashes (about 4) & glass (3) in windows, door",
      "source": "sf-building-permits"
    },
    {
      "number": "8407407",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "1984-07-09",
      "status_date": "1984-11-09",
      "estimated_cost": 9000,
      "description": "remodel kitchen",
      "source": "sf-building-permits"
    }
  ],
  "sources": [
    {
      "id": "sf-eas-addresses",
      "name": "SF Enterprise Addressing System via DataSF",
      "query": "https://data.sfgov.org/resource/3mea-di5p.json?street_name=20TH&street_type=ST&address_number=4345",
      "retrieved": "2026-07-28"
    },
    {
      "id": "sf-assessor-roll",
      "name": "SF Office of the Assessor-Recorder via DataSF (2025 secured roll)",
      "query": "https://data.sfgov.org/resource/wv5m-vpq2.json?parcel_number=2751021&$order=closed_roll_year%20DESC&$limit=1",
      "retrieved": "2026-07-28"
    },
    {
      "id": "sf-building-permits",
      "name": "SF Dept. of Building Inspection via DataSF",
      "query": "https://data.sfgov.org/resource/i98e-djp9.json?block=2751&lot=021",
      "retrieved": "2026-07-28"
    },
    {
      "id": "sf-planning",
      "name": "SF Planning Department — Historic Resource Status by Parcel via DataSF",
      "query": "https://data.sfgov.org/resource/3tsw-4idn.json?apn=2751021",
      "retrieved": "2026-07-28"
    },
    {
      "id": "loc-sf-call-1908-05-13",
      "name": "The San Francisco Call, 13 May 1908, p. 12",
      "query": "https://chroniclingamerica.loc.gov/lccn/sn85066387/1908-05-13/ed-1/seq-12/",
      "retrieved": "2026-10-04"
    }
  ],
  "historical_record": [
    {
      "date": "1908-05-13",
      "kind": "building contract",
      "description": "Tholke & Wolford contracted for all work except mantels and gas grates on a two-storey frame building, at $3,000.",
      "source": "loc-sf-call-1908-05-13"
    }
  ]
}