{
  "address": "3642–3644 20th Street, San Francisco, CA 94110",
  "path": "/san-francisco/mission/20th-street/3642/",
  "apn": "3597018",
  "block": "3597",
  "lot": "018",
  "eas_baseid": "361556",
  "coordinates": {
    "lat": 37.758684,
    "lng": -122.422289
  },
  "address_range": "3642–3644",
  "street_numbers_on_parcel": [
    "3642",
    "3644"
  ],
  "parcel": {
    "year_built": 1899,
    "units": 2,
    "stories": 2,
    "rooms": 9,
    "bathrooms": 2,
    "bedrooms": 3,
    "lot_area_sqft": 3192,
    "building_area_sqft": 1880,
    "lot_depth_ft": 14,
    "use": "Multi-Family Residential",
    "property_class": "Flats & Duplex",
    "construction_type_code": "D",
    "zoning": "RH-3",
    "supervisor_district": 9,
    "assessor_neighborhood": "Mission Dolores",
    "analysis_neighborhood": "Mission",
    "property_location_raw": "3644 3642 20TH                ST0000"
  },
  "assessment": {
    "roll_year": 2025,
    "assessed_land_value": 509637,
    "assessed_improvement_value": 509637,
    "last_sale_date": "2011-11-22"
  },
  "historic_status": {
    "ceqa_status_code": "A",
    "ceqa_status_code_article_10_11": "A",
    "ceqa_status_label": "Historic resource",
    "reason": "Historic Survey Result",
    "yearbuilt": "1899",
    "in_article_10_11_historic_district": false,
    "source": "sf-planning"
  },
  "permits": [
    {
      "number": "201805240130",
      "type": "otc alterations permit",
      "status": "issued",
      "filed": "2018-05-24",
      "status_date": "2018-05-24",
      "estimated_cost": 2000,
      "revised_cost": 2000,
      "description": "repair of wood bems that had rotted out of deck on 2/f less than 50%. replace with nicer wood. to comply with complaint #201866062.",
      "source": "sf-building-permits"
    },
    {
      "number": "201202063653",
      "type": "otc alterations permit",
      "status": "issued",
      "filed": "2012-02-06",
      "status_date": "2012-02-06",
      "estimated_cost": 5000,
      "revised_cost": 5000,
      "description": "repair dry rot less than 50%. rear deck not visible from street.",
      "source": "sf-building-permits"
    },
    {
      "number": "200104307950",
      "type": "otc alterations permit",
      "status": "expired",
      "filed": "2001-04-30",
      "status_date": "2002-02-08",
      "estimated_cost": 14750,
      "revised_cost": 14750,
      "description": "reroofing",
      "source": "sf-building-permits"
    },
    {
      "number": "9822794",
      "type": "otc alterations permit",
      "status": "expired",
      "filed": "1998-11-05",
      "status_date": "1999-03-05",
      "estimated_cost": 750,
      "description": "reroofing",
      "source": "sf-building-permits"
    },
    {
      "number": "9603358",
      "type": "additions alterations or repairs",
      "status": "expired",
      "filed": "1996-02-29",
      "status_date": "1996-10-04",
      "estimated_cost": 8300,
      "description": "horizontal",
      "source": "sf-building-permits"
    },
    {
      "number": "9124313",
      "type": "additions alterations or repairs",
      "status": "complete",
      "filed": "1991-12-31",
      "status_date": "1992-11-25",
      "estimated_cost": 3500,
      "revised_cost": 16000,
      "description": "horizontal addition",
      "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=3642",
      "retrieved": "2026-07-31"
    },
    {
      "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=3597018&$order=closed_roll_year%20DESC&$limit=1",
      "retrieved": "2026-07-31"
    },
    {
      "id": "sf-building-permits",
      "name": "SF Dept. of Building Inspection via DataSF",
      "query": "https://data.sfgov.org/resource/i98e-djp9.json?block=3597&lot=018",
      "retrieved": "2026-07-31"
    },
    {
      "id": "sf-planning",
      "name": "SF Planning Department — Historic Resource Status by Parcel via DataSF",
      "query": "https://data.sfgov.org/resource/3tsw-4idn.json?apn=3597018",
      "retrieved": "2026-07-31"
    }
  ]
}