{
  "address": "3616–3618 20th Street, San Francisco, CA 94110",
  "path": "/san-francisco/mission/20th-street/3616/",
  "apn": "3597013",
  "block": "3597",
  "lot": "013",
  "eas_baseid": "361552",
  "coordinates": {
    "lat": 37.758712,
    "lng": -122.421825
  },
  "address_range": "3616–3618",
  "street_numbers_on_parcel": [
    "3616",
    "3618"
  ],
  "parcel": {
    "year_built": 1907,
    "units": 2,
    "stories": 2,
    "rooms": 10,
    "bathrooms": 2,
    "lot_area_sqft": 2850,
    "building_area_sqft": 3050,
    "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": "3618 3616 20TH                ST0000"
  },
  "assessment": {
    "roll_year": 2025,
    "assessed_land_value": 163637,
    "assessed_improvement_value": 231219
  },
  "historic_status": {
    "ceqa_status_code": "A",
    "ceqa_status_code_article_10_11": "A",
    "ceqa_status_label": "Historic resource",
    "reason": "Historic Survey Result",
    "yearbuilt": "1907",
    "in_article_10_11_historic_district": false,
    "source": "sf-planning"
  },
  "permits": [
    {
      "number": "201108122375",
      "type": "otc alterations permit",
      "status": "issued",
      "filed": "2011-08-12",
      "status_date": "2011-08-12",
      "estimated_cost": 15000,
      "revised_cost": 15000,
      "description": "to complete work and schedule for final under pa #200908245422.",
      "source": "sf-building-permits"
    },
    {
      "number": "200911161269",
      "type": "otc alterations permit",
      "status": "cancelled",
      "filed": "2009-11-16",
      "status_date": "2026-01-27",
      "estimated_cost": 4000,
      "revised_cost": 4000,
      "description": "voluntary strengthening of (e) permiter walla at ground floor. 1/2 plywood structural 1 wt 6d at 6\" edges & 12\" in field. add 5/8\", ab x 7\" at 48\" drill epoxy 4\" into (e) concrete",
      "source": "sf-building-permits"
    },
    {
      "number": "200911161297",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2009-11-16",
      "status_date": "2009-12-16",
      "estimated_cost": 4000,
      "revised_cost": 4000,
      "description": "voluntary strenghthening of existing perimeter walls @ ground floor 1/2\" plywood structural i wt gd 6\" and 12\" in field. add 5/8\" a.3 x 7\" @ 48\". drill epoxy 4\" into in (e) garage. total 60'.",
      "source": "sf-building-permits"
    },
    {
      "number": "200908245422",
      "type": "otc alterations permit",
      "status": "issued",
      "filed": "2009-08-24",
      "status_date": "2009-08-24",
      "estimated_cost": 18000,
      "revised_cost": 18000,
      "description": "to complete and obtain final inspection for work under pa 200708240790",
      "source": "sf-building-permits"
    },
    {
      "number": "200708240790",
      "type": "otc alterations permit",
      "status": "issued",
      "filed": "2007-08-24",
      "status_date": "2007-08-24",
      "estimated_cost": 18000,
      "revised_cost": 18000,
      "description": "insulate laundry rooms and 1st floor, provide 5/8\" type x at property line walls - 1/2\" every where elese. provide more studs as needed, provide insulation at ceiling. new windows in stair walls.",
      "source": "sf-building-permits"
    },
    {
      "number": "200401093771",
      "type": "otc alterations permit",
      "status": "issued",
      "filed": "2004-01-09",
      "status_date": "2004-01-09",
      "estimated_cost": 9600,
      "revised_cost": 9600,
      "description": "reroofing",
      "source": "sf-building-permits"
    },
    {
      "number": "9302405S",
      "type": "additions alterations or repairs",
      "status": "expired",
      "filed": "1993-02-12",
      "status_date": "1996-07-26",
      "estimated_cost": 75000,
      "description": "horizontal",
      "source": "sf-building-permits"
    },
    {
      "number": "9018047",
      "type": "otc alterations permit",
      "status": "expired",
      "filed": "1990-09-10",
      "status_date": "1991-06-05",
      "estimated_cost": 1900,
      "description": "install two wood 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=3616",
      "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=3597013&$order=closed_roll_year%20DESC&$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=013",
      "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=3597013",
      "retrieved": "2026-07-31"
    },
    {
      "id": "loc-sf-call-1907-02-15",
      "name": "The San Francisco Call, 15 February 1907, p. 13",
      "query": "https://chroniclingamerica.loc.gov/lccn/sn85066387/1907-02-15/ed-1/seq-13/",
      "retrieved": "2026-10-04"
    }
  ],
  "historical_record": [
    {
      "date": "1907-02-15",
      "kind": "building contract",
      "description": "Frank Crothers contracted to put up a two-storey frame building.",
      "source": "loc-sf-call-1907-02-15"
    }
  ]
}