{
  "address": "3784–3786 20th Street, San Francisco, CA 94110",
  "path": "/san-francisco/mission/20th-street/3784/",
  "apn": "3598023",
  "block": "3598",
  "lot": "023",
  "eas_baseid": "361630",
  "coordinates": {
    "lat": 37.758451,
    "lng": -122.42526
  },
  "address_range": "3784–3786",
  "street_numbers_on_parcel": [
    "3784",
    "3786"
  ],
  "parcel": {
    "year_built": 1908,
    "units": 2,
    "stories": 4,
    "rooms": 13,
    "bathrooms": 5,
    "bedrooms": 5,
    "lot_area_sqft": 1912,
    "building_area_sqft": 5038,
    "basement_area_sqft": 1419,
    "use": "Multi-Family Residential",
    "property_class": "Flats & Duplex",
    "construction_type_code": "D",
    "zoning": "RH-3",
    "supervisor_district": 8,
    "assessor_neighborhood": "Mission Dolores",
    "analysis_neighborhood": "Mission",
    "property_location_raw": "3786 3784 20TH                ST0000"
  },
  "assessment": {
    "roll_year": 2025,
    "assessed_land_value": 461081,
    "assessed_improvement_value": 1144957,
    "last_sale_date": "2000-03-24"
  },
  "historic_status": {
    "ceqa_status_code": "A",
    "ceqa_status_code_article_10_11": "A",
    "ceqa_status_label": "Historic resource",
    "reason": "California Register Historic District, Historic Survey Result",
    "yearbuilt": "1908",
    "in_article_10_11_historic_district": false,
    "source": "sf-planning"
  },
  "historic_district": {
    "name": "Inner Mission Boulevards and Alleys Reconstruction Historic District",
    "california_register_status": "Eligible (not listed)",
    "national_register_status": "Not listed",
    "article_10_11_status": "No local landmark protection",
    "local_landmark_protection": false,
    "period_of_significance": "1906–1917",
    "source": "sf-historic-districts"
  },
  "permits": [
    {
      "number": "202211146404",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2022-11-14",
      "status_date": "2022-12-23",
      "estimated_cost": 15000,
      "revised_cost": 15000,
      "description": "removal of extg damaged terra-cotta flue tiles and replacing with listed class-a metal chimney systems. this is a repair, not a reconstructing. no roof work seen from the street.",
      "source": "sf-building-permits"
    },
    {
      "number": "202210275306",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2022-10-27",
      "status_date": "2023-07-24",
      "estimated_cost": 50000,
      "revised_cost": 70000,
      "description": "add window @ rear, replace other windows in-kind, remove wall at living room, repair fire damage. replace (e) fireplace. to comply w/bid nov#20229203 dated 6/15/2022",
      "source": "sf-building-permits"
    },
    {
      "number": "M353607",
      "type": "otc alterations permit",
      "status": "issued",
      "filed": "2012-10-18",
      "status_date": "2012-10-18",
      "revised_cost": 1,
      "description": "street space permit",
      "source": "sf-building-permits"
    },
    {
      "number": "201207195213",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2012-07-19",
      "status_date": "2013-01-16",
      "estimated_cost": 30000,
      "revised_cost": 30000,
      "description": "add dormer at rear facade, add bathroom at 4th floor.",
      "source": "sf-building-permits"
    },
    {
      "number": "200608088840",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2006-08-08",
      "status_date": "2006-08-16",
      "estimated_cost": 4000,
      "revised_cost": 4000,
      "description": "replace 100 ft of rear stair railing. patch 2 landings & repair. 4 steps. not guardrail posts. additional permits & plans may be required if structural details are needed. less than 50% of deck / stairs. all repair in kind.",
      "source": "sf-building-permits"
    },
    {
      "number": "200602285584",
      "type": "additions alterations or repairs",
      "status": "complete",
      "filed": "2006-02-28",
      "status_date": "2006-09-22",
      "estimated_cost": 100000,
      "revised_cost": 100000,
      "description": "new garage in basement. infill lightwell @ basement only.",
      "source": "sf-building-permits"
    },
    {
      "number": "200105300184",
      "type": "additions alterations or repairs",
      "status": "complete",
      "filed": "2001-05-30",
      "status_date": "2002-05-24",
      "estimated_cost": 100000,
      "revised_cost": 100000,
      "description": "kitchen remodel both units, redo partial roof framing over flat roof area, new hvac to be installed",
      "source": "sf-building-permits"
    },
    {
      "number": "200011216334",
      "type": "otc alterations permit",
      "status": "expired",
      "filed": "2000-11-21",
      "status_date": "2001-03-21",
      "estimated_cost": 5000,
      "revised_cost": 5000,
      "description": "replace sheet rock, tile shower & floor install light & electrical switches, raise shower........",
      "source": "sf-building-permits"
    },
    {
      "number": "200003305868",
      "type": "otc alterations permit",
      "status": "expired",
      "filed": "2000-03-30",
      "status_date": "2000-07-30",
      "revised_cost": 2340,
      "description": "termite repair",
      "source": "sf-building-permits"
    },
    {
      "number": "9419877",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "1994-12-02",
      "status_date": "1995-02-09",
      "estimated_cost": 9500,
      "description": "reroof",
      "source": "sf-building-permits"
    },
    {
      "number": "9300995",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "1993-01-22",
      "status_date": "1993-04-28",
      "estimated_cost": 3000,
      "description": "raise foundation on east side of building",
      "source": "sf-building-permits"
    },
    {
      "number": "9216260",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "1992-09-21",
      "status_date": "1993-02-11",
      "estimated_cost": 1000,
      "description": "repair below grade post cap and pier",
      "source": "sf-building-permits"
    },
    {
      "number": "9213915",
      "type": "otc alterations permit",
      "status": "expired",
      "filed": "1992-08-17",
      "status_date": "1993-02-11",
      "estimated_cost": 1000,
      "description": "repair below grate",
      "source": "sf-building-permits"
    },
    {
      "number": "9208079",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "1992-05-18",
      "status_date": "1992-06-10",
      "estimated_cost": 400,
      "description": "repair mudsill & part of foundation",
      "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=3784",
      "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=3598023&$order=closed_roll_year%20DESC&$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=3598&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=3598023",
      "retrieved": "2026-07-31"
    },
    {
      "id": "sf-historic-districts",
      "name": "SF Planning Department — Historic Districts via DataSF",
      "query": "https://data.sfgov.org/resource/63x5-g3m4.json?$where=intersects(the_geom,%20%27POINT(-122.42525996945774%2037.758450959067396)%27)",
      "retrieved": "2026-07-31"
    }
  ]
}