{
  "address": "3662–3664 20th Street, San Francisco, CA 94110",
  "path": "/san-francisco/mission/20th-street/3662/",
  "apn": "3597023",
  "block": "3597",
  "lot": "023",
  "eas_baseid": "361561",
  "coordinates": {
    "lat": 37.758658,
    "lng": -122.422723
  },
  "address_range": "3662–3664",
  "street_numbers_on_parcel": [
    "3662",
    "3664"
  ],
  "parcel": {
    "year_built": 1909,
    "units": 2,
    "stories": 2,
    "rooms": 13,
    "bathrooms": 2,
    "lot_area_sqft": 2827,
    "building_area_sqft": 3500,
    "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": "3664 3662 20TH                ST0000"
  },
  "assessment": {
    "roll_year": 2025,
    "assessed_land_value": 47334,
    "assessed_improvement_value": 53793
  },
  "historic_status": {
    "ceqa_status_code": "C",
    "ceqa_status_code_article_10_11": "C",
    "ceqa_status_label": "Not a historical resource",
    "reason": "Historic Survey Result",
    "yearbuilt": "1909",
    "in_article_10_11_historic_district": false,
    "source": "sf-planning"
  },
  "permits": [
    {
      "number": "201308063665",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2013-08-06",
      "status_date": "2013-08-19",
      "estimated_cost": 2000,
      "revised_cost": 2000,
      "description": "comply with violation # 201314992 exceeded scope for pa 201306250413, add plan to stairway replacement in kind.",
      "source": "sf-building-permits"
    },
    {
      "number": "201306250413",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2013-06-25",
      "status_date": "2013-08-19",
      "estimated_cost": 7000,
      "revised_cost": 7000,
      "description": "replace rear stair and landing (same layout as present), dryrot repair (less than 50% being replaced)",
      "source": "sf-building-permits"
    },
    {
      "number": "M89925",
      "type": "otc alterations permit",
      "status": "issued",
      "filed": "2007-10-09",
      "status_date": "2007-10-09",
      "revised_cost": 1,
      "description": "street space permit only.",
      "source": "sf-building-permits"
    },
    {
      "number": "M65970",
      "type": "otc alterations permit",
      "status": "issued",
      "filed": "2007-04-27",
      "status_date": "2007-04-27",
      "revised_cost": 0,
      "description": "street space & sidewalk",
      "source": "sf-building-permits"
    },
    {
      "number": "200409073456",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2004-09-07",
      "status_date": "2004-10-05",
      "estimated_cost": 9800,
      "revised_cost": 9800,
      "description": "reroofing",
      "source": "sf-building-permits"
    },
    {
      "number": "8800349",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "1988-01-11",
      "status_date": "1988-02-17",
      "estimated_cost": 2100,
      "description": "install alum windows",
      "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=3662",
      "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=3597023&$order=closed_roll_year%20DESC&$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=023",
      "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=3597023",
      "retrieved": "2026-07-31"
    },
    {
      "id": "loc-sf-call-1907-03-20",
      "name": "The San Francisco Call, 20 March 1907, p. 13",
      "query": "https://chroniclingamerica.loc.gov/lccn/sn85066387/1907-03-20/ed-1/seq-13/",
      "retrieved": "2026-10-04"
    }
  ],
  "historical_record": [
    {
      "date": "1907-03-20",
      "kind": "building contract",
      "description": "C. Wright contracted to put up a two-storey frame building, at $6,200.",
      "source": "loc-sf-call-1907-03-20"
    }
  ]
}