{
  "address": "3666–3670 20th Street, San Francisco, CA 94110",
  "path": "/san-francisco/mission/20th-street/3666/",
  "apn": "3597024",
  "block": "3597",
  "lot": "024",
  "eas_baseid": "361562",
  "coordinates": {
    "lat": 37.758653,
    "lng": -122.422809
  },
  "address_range": "3666–3670",
  "street_numbers_on_parcel": [
    "3666",
    "3668",
    "3670"
  ],
  "parcel": {
    "year_built": 1907,
    "units": 5,
    "stories": 3,
    "rooms": 18,
    "bathrooms": 5,
    "lot_area_sqft": 2850,
    "building_area_sqft": 4290,
    "lot_depth_ft": 14,
    "use": "Multi-Family Residential",
    "property_class": "Apartment 5 to 14 Units",
    "construction_type_code": "D",
    "zoning": "RH-3",
    "supervisor_district": 9,
    "assessor_neighborhood": "Mission Dolores",
    "analysis_neighborhood": "Mission",
    "property_location_raw": "3670 3666 20TH                ST0000"
  },
  "assessment": {
    "roll_year": 2025,
    "assessed_land_value": 640583,
    "assessed_improvement_value": 640583,
    "assessed_fixtures_value": 158
  },
  "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": "1907",
    "in_article_10_11_historic_district": false,
    "source": "sf-planning"
  },
  "permits": [
    {
      "number": "M1172909",
      "type": "otc alterations permit",
      "status": "issued",
      "filed": "2019-12-05",
      "status_date": "2019-12-05",
      "revised_cost": 1,
      "description": "street space",
      "source": "sf-building-permits"
    },
    {
      "number": "201911046386",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2019-11-04",
      "status_date": "2020-01-29",
      "estimated_cost": 5000,
      "revised_cost": 5000,
      "description": "rev to pa# 201709148298; add new concrete footing in the basement level soft story retrofit per sfbc chapter 4d.",
      "source": "sf-building-permits"
    },
    {
      "number": "201709148298",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2017-09-14",
      "status_date": "2020-01-29",
      "estimated_cost": 70000,
      "revised_cost": 70000,
      "description": "soft story retrofit per sfebc chapter 4d, 2016 cebc appendix a-4",
      "source": "sf-building-permits"
    },
    {
      "number": "201412194145",
      "type": "otc alterations permit",
      "status": "issued",
      "filed": "2014-12-19",
      "status_date": "2014-12-19",
      "estimated_cost": 5000,
      "revised_cost": 5000,
      "description": "reroofing",
      "source": "sf-building-permits"
    },
    {
      "number": "M447947",
      "type": "otc alterations permit",
      "status": "issued",
      "filed": "2013-12-02",
      "status_date": "2013-12-02",
      "revised_cost": 1,
      "description": "street spce",
      "source": "sf-building-permits"
    },
    {
      "number": "M116885",
      "type": "otc alterations permit",
      "status": "issued",
      "filed": "2008-04-22",
      "status_date": "2008-04-22",
      "revised_cost": 1,
      "description": "street space.",
      "source": "sf-building-permits"
    },
    {
      "number": "200804210267",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2008-04-21",
      "status_date": "2008-08-11",
      "estimated_cost": 25000,
      "revised_cost": 25000,
      "description": "work @ one unit only. remodel (e) kitchen & bath. no structural changes. new exhaust fan in bath. termination 3' min from p.l. & openings.",
      "source": "sf-building-permits"
    },
    {
      "number": "M58853",
      "type": "otc alterations permit",
      "status": "issued",
      "filed": "2007-02-26",
      "status_date": "2007-02-26",
      "revised_cost": 0,
      "description": "streetspace and sidewalk",
      "source": "sf-building-permits"
    },
    {
      "number": "M29560",
      "type": "otc alterations permit",
      "status": "issued",
      "filed": "2004-10-01",
      "status_date": "2004-10-01",
      "revised_cost": 0,
      "description": "street space & side walk permit.",
      "source": "sf-building-permits"
    },
    {
      "number": "200301084790",
      "type": "otc alterations permit",
      "status": "issued",
      "filed": "2003-01-08",
      "status_date": "2003-01-08",
      "estimated_cost": 18500,
      "revised_cost": 18500,
      "description": "repalce section of extg foundation",
      "source": "sf-building-permits"
    },
    {
      "number": "9913905",
      "type": "otc alterations permit",
      "status": "expired",
      "filed": "1999-07-08",
      "status_date": "2000-02-02",
      "estimated_cost": 4790,
      "description": "reroofing",
      "source": "sf-building-permits"
    },
    {
      "number": "9618107",
      "type": "additions alterations or repairs",
      "status": "complete",
      "filed": "1996-09-23",
      "status_date": "1996-12-26",
      "estimated_cost": 6500,
      "description": "repair rear exterior stairs, install 1 hr. fire wall b/stair",
      "source": "sf-building-permits"
    },
    {
      "number": "9123154",
      "type": "otc alterations permit",
      "status": "expired",
      "filed": "1991-12-06",
      "status_date": "1992-04-06",
      "estimated_cost": 1200,
      "description": "take out plaster & hallway in one unit",
      "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=3666",
      "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=3597024&$order=closed_roll_year%20DESC&$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=024",
      "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=3597024",
      "retrieved": "2026-07-31"
    }
  ]
}