{
  "address": "3716–3720 20th Street, San Francisco, CA 94110",
  "path": "/san-francisco/mission/20th-street/3716/",
  "apn": "3598010",
  "block": "3598",
  "lot": "010",
  "eas_baseid": "451315",
  "coordinates": {
    "lat": 37.758575,
    "lng": -122.424059
  },
  "address_range": "3716–3720",
  "street_numbers_on_parcel": [
    "3716",
    "3718",
    "3720"
  ],
  "parcel": {
    "year_built": 1906,
    "units": 2,
    "stories": 4,
    "rooms": 19,
    "bathrooms": 6,
    "bedrooms": 8,
    "lot_area_sqft": 2850,
    "building_area_sqft": 6816,
    "basement_area_sqft": 723,
    "lot_depth_ft": 14,
    "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": "3720 3718 20TH                ST0000"
  },
  "assessment": {
    "roll_year": 2025,
    "assessed_land_value": 155348,
    "assessed_improvement_value": 518942
  },
  "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": "1906",
    "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": "202509246036",
      "type": "additions alterations or repairs",
      "status": "issued",
      "filed": "2025-10-25",
      "status_date": "2026-02-20",
      "estimated_cost": 1750000,
      "revised_cost": 1750000,
      "description": "interior renovation. no veritcal or horizontal addition. preserving the front facade. replace vinyl windows on the front facade with wood windows. changes to fenestrations on other facades, not readily visible from public right of way. approx 12\" partial expansion of ground floor garage into",
      "source": "sf-building-permits"
    },
    {
      "number": "202401234443",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2024-01-23",
      "status_date": "2024-01-24",
      "estimated_cost": 6800,
      "revised_cost": 6800,
      "description": "re-roofing (rear lower roof)",
      "source": "sf-building-permits"
    },
    {
      "number": "202310259472",
      "type": "otc alterations permit",
      "status": "suspend",
      "filed": "2023-10-25",
      "status_date": "2024-03-28",
      "estimated_cost": 15000,
      "revised_cost": 15000,
      "description": "reroofing",
      "source": "sf-building-permits"
    },
    {
      "number": "202104098213",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2021-04-09",
      "status_date": "2021-07-14",
      "estimated_cost": 10000,
      "revised_cost": 15000,
      "description": "no rough opening changrd u-factor for glazing shall not exceed0.30. new flooring & painting in-kind. replace 1 window and 1 door @ rear. kitchen remodel in-kind, painting, dry wall patch, fix dry rot siding 4 sf. no street facing. no structural work.",
      "source": "sf-building-permits"
    },
    {
      "number": "201801310065",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2018-01-31",
      "status_date": "2018-06-04",
      "estimated_cost": 4500,
      "revised_cost": 12000,
      "description": "small bath - plaster and lathe removed., new: bathtub, vanity, touilet remaining, new plumb connections, new sheetrock & ceramic tile around bathtub, paint.",
      "source": "sf-building-permits"
    },
    {
      "number": "201304305790",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2013-04-30",
      "status_date": "2013-05-02",
      "estimated_cost": 1,
      "revised_cost": 500,
      "description": "revision to app#201108041716.change from bedroom to a den.",
      "source": "sf-building-permits"
    },
    {
      "number": "201207094347",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2012-07-09",
      "status_date": "2013-05-02",
      "estimated_cost": 7000,
      "revised_cost": 7000,
      "description": "revision to appl #2011.08.04.1716 - revise moment frame location, new foundation per plan.",
      "source": "sf-building-permits"
    },
    {
      "number": "M292027",
      "type": "otc alterations permit",
      "status": "issued",
      "filed": "2011-12-08",
      "status_date": "2011-12-08",
      "revised_cost": 1,
      "description": "street space permit.",
      "source": "sf-building-permits"
    },
    {
      "number": "201108041716",
      "type": "additions alterations or repairs",
      "status": "complete",
      "filed": "2011-08-04",
      "status_date": "2013-05-02",
      "estimated_cost": 60000,
      "revised_cost": 60000,
      "description": "this project consists of interior alterations to an (e) 4 story, 2 unit building. work also includes a (n) larger garage door. interior alterations include general improvements, a (n) interior stair connecting 1st fl to 2nd fl. (n) closets, & a bathroom remodel.",
      "source": "sf-building-permits"
    },
    {
      "number": "9911121",
      "type": "otc alterations permit",
      "status": "expired",
      "filed": "1999-06-04",
      "status_date": "1999-12-04",
      "estimated_cost": 10000,
      "description": "construct stairs from basement to second level",
      "source": "sf-building-permits"
    },
    {
      "number": "9619715",
      "type": "otc alterations permit",
      "status": "expired",
      "filed": "1996-10-15",
      "status_date": "1997-06-11",
      "estimated_cost": 6800,
      "description": "reroofing",
      "source": "sf-building-permits"
    },
    {
      "number": "9207160",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "1992-05-01",
      "status_date": "1992-06-30",
      "estimated_cost": 1,
      "revised_cost": 0,
      "description": "for final inspection only 9015006",
      "source": "sf-building-permits"
    },
    {
      "number": "9015006",
      "type": "additions alterations or repairs",
      "status": "expired",
      "filed": "1990-07-30",
      "status_date": "1992-01-02",
      "estimated_cost": 10000,
      "description": "permit to dismantle previous #8716023 not granted",
      "source": "sf-building-permits"
    },
    {
      "number": "8716023",
      "type": "additions alterations or repairs",
      "status": "cancelled",
      "filed": "1987-11-09",
      "status_date": "1989-12-22",
      "estimated_cost": 12000,
      "description": "addition of new apartment unit within the garage level",
      "source": "sf-building-permits"
    },
    {
      "number": "8500294",
      "type": "additions alterations or repairs",
      "status": "expired",
      "filed": "1985-01-09",
      "status_date": "1985-08-30",
      "estimated_cost": 5000,
      "description": "construct walls, plumbing, electrical",
      "source": "sf-building-permits"
    },
    {
      "number": "8408713",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "1984-08-10",
      "status_date": "1984-12-13",
      "estimated_cost": 900,
      "description": "pour concrete slab in basement area approx. 16'x10'",
      "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=3716",
      "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=3598010&$order=closed_roll_year%20DESC&$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=010",
      "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=3598010",
      "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(-122.42405868411238%2037.75857521852983)%27)",
      "retrieved": "2026-07-31"
    },
    {
      "id": "loc-sf-call-1906-08-13",
      "name": "The San Francisco Call, 13 August 1906, p. 11",
      "query": "https://chroniclingamerica.loc.gov/lccn/sn85066387/1906-08-13/ed-1/seq-11/",
      "retrieved": "2026-10-05"
    }
  ],
  "historical_record": [
    {
      "date": "1906-08-13",
      "kind": "building contract",
      "description": "Barry Construction Company contracted to put up a three-storey building, at $8,295.",
      "source": "loc-sf-call-1906-08-13"
    }
  ]
}