{
  "address": "3646 20th Street, San Francisco, CA 94110",
  "path": "/san-francisco/mission/20th-street/3646/",
  "apn": "3597019",
  "block": "3597",
  "lot": "019",
  "eas_baseid": "361557",
  "coordinates": {
    "lat": 37.758679,
    "lng": -122.422376
  },
  "parcel": {
    "year_built": 1907,
    "units": 2,
    "stories": 2,
    "rooms": 11,
    "bathrooms": 2,
    "lot_area_sqft": 2508,
    "building_area_sqft": 2860,
    "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": "3648 3646 20TH                ST0000"
  },
  "assessment": {
    "roll_year": 2025,
    "assessed_land_value": 986814,
    "assessed_improvement_value": 422918,
    "last_sale_date": "2013-09-17"
  },
  "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": "202012241700",
      "type": "otc alterations permit",
      "status": "issued",
      "filed": "2020-12-24",
      "status_date": "2020-12-24",
      "estimated_cost": 14000,
      "revised_cost": 14000,
      "description": "reroofing",
      "source": "sf-building-permits"
    },
    {
      "number": "202012090620",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2020-12-09",
      "status_date": "2021-01-21",
      "estimated_cost": 14500,
      "revised_cost": 14500,
      "description": "reroofing",
      "source": "sf-building-permits"
    },
    {
      "number": "201311212505",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2013-11-21",
      "status_date": "2014-04-11",
      "estimated_cost": 18000,
      "revised_cost": 18000,
      "description": "kitchen, bathroom remodel. no structural work. same location.",
      "source": "sf-building-permits"
    },
    {
      "number": "M189229",
      "type": "otc alterations permit",
      "status": "issued",
      "filed": "2010-01-28",
      "status_date": "2010-01-28",
      "revised_cost": 1,
      "description": "street space & sidewalk",
      "source": "sf-building-permits"
    },
    {
      "number": "M30073",
      "type": "otc alterations permit",
      "status": "issued",
      "filed": "2004-11-04",
      "status_date": "2004-11-04",
      "revised_cost": 0,
      "description": "sidewalk repair",
      "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=3646",
      "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=3597019&$order=closed_roll_year%20DESC&$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=019",
      "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=3597019",
      "retrieved": "2026-07-31"
    },
    {
      "id": "loc-sf-call-1907-08-23",
      "name": "The San Francisco Call, 23 August 1907, p. 15",
      "query": "https://chroniclingamerica.loc.gov/lccn/sn85066387/1907-08-23/ed-1/seq-15/",
      "retrieved": "2026-10-04"
    }
  ],
  "historical_record": [
    {
      "date": "1907-08-23",
      "kind": "building contract",
      "description": "A builder contracted to put up two-storey frame flats, at $5,585.",
      "source": "loc-sf-call-1907-08-23"
    }
  ]
}