{
  "address": "3924 20th Street, San Francisco, CA 94114",
  "path": "/san-francisco/castro/20th-street/3924/",
  "apn": "3600099",
  "block": "3600",
  "lot": "099",
  "eas_baseid": "445703",
  "coordinates": {
    "lat": 37.758295,
    "lng": -122.428699
  },
  "parcel": {
    "year_built": 1920,
    "units": 4,
    "stories": 2,
    "rooms": 14,
    "bathrooms": 4,
    "bedrooms": 5,
    "lot_area_sqft": 3420,
    "building_area_sqft": 3515,
    "lot_depth_ft": 14,
    "use": "Multi-Family Residential",
    "property_class": "Apartment 4 units or less",
    "construction_type_code": "D",
    "zoning": "RH-2",
    "supervisor_district": 8,
    "assessor_neighborhood": "Eureka Valley/Dolores Heights",
    "analysis_neighborhood": "Castro/Upper Market",
    "property_location_raw": "0000 3924 20TH                ST0000"
  },
  "assessment": {
    "roll_year": 2025,
    "assessed_land_value": 1328040,
    "assessed_improvement_value": 569160,
    "last_sale_date": "2023-10-06"
  },
  "historic_status": {
    "ceqa_status_code": "B",
    "ceqa_status_code_article_10_11": "B",
    "ceqa_status_label": "Unevaluated",
    "reason": "No evaluation and 45 years or older",
    "yearbuilt": "1920",
    "in_article_10_11_historic_district": false,
    "source": "sf-planning"
  },
  "permits": [
    {
      "number": "202509185609",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2025-09-18",
      "status_date": "2025-12-03",
      "estimated_cost": 25000,
      "revised_cost": 25000,
      "description": "one unit: to remodel kitchen in kind.",
      "source": "sf-building-permits"
    },
    {
      "number": "201604275852",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2016-04-27",
      "status_date": "2016-05-03",
      "estimated_cost": 7000,
      "revised_cost": 7000,
      "description": "repair of section of stairway.",
      "source": "sf-building-permits"
    },
    {
      "number": "201406300133",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2014-06-30",
      "status_date": "2014-10-06",
      "estimated_cost": 30000,
      "revised_cost": 30000,
      "description": "rev. to 201206072097 - to re-build the front stair",
      "source": "sf-building-permits"
    },
    {
      "number": "201206072097",
      "type": "otc alterations permit",
      "status": "issued",
      "filed": "2012-06-07",
      "status_date": "2012-06-07",
      "estimated_cost": 1000,
      "revised_cost": 1000,
      "description": "minor framing repair to outside staircase less than 50%",
      "source": "sf-building-permits"
    },
    {
      "number": "M36413",
      "type": "otc alterations permit",
      "status": "issued",
      "filed": "2006-02-16",
      "status_date": "2006-02-16",
      "revised_cost": 0,
      "description": "street space",
      "source": "sf-building-permits"
    },
    {
      "number": "200601101834",
      "type": "otc alterations permit",
      "status": "issued",
      "filed": "2006-01-10",
      "status_date": "2006-01-10",
      "estimated_cost": 4000,
      "revised_cost": 4000,
      "description": "revisin to cost. increase cost at work $4,000.oo for app#200510266634.",
      "source": "sf-building-permits"
    },
    {
      "number": "200510266634",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2005-10-26",
      "status_date": "2006-03-15",
      "estimated_cost": 6000,
      "revised_cost": 6000,
      "description": "repair side stairway, replace dryrot on lower landing standing stairs and supports (less than 50% being replacement)",
      "source": "sf-building-permits"
    },
    {
      "number": "8915866",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "1989-08-29",
      "status_date": "1989-09-18",
      "estimated_cost": 6100,
      "description": "install aluminum windows",
      "source": "sf-building-permits"
    },
    {
      "number": "8803652",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "1988-03-23",
      "status_date": "1988-04-28",
      "estimated_cost": 2205,
      "description": "install aluminum windows",
      "source": "sf-building-permits"
    },
    {
      "number": "8715879",
      "type": "otc alterations permit",
      "status": "expired",
      "filed": "1987-11-04",
      "status_date": "1988-02-08",
      "estimated_cost": 1575,
      "description": "repair perimeter base of wall",
      "source": "sf-building-permits"
    },
    {
      "number": "8500736",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "1985-01-23",
      "status_date": "1985-02-26",
      "estimated_cost": 1200,
      "description": "sheetrock 5-7 tile around bathtub",
      "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=3924",
      "retrieved": "2026-07-28"
    },
    {
      "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=3600099&$order=closed_roll_year%20DESC&$limit=1",
      "retrieved": "2026-07-28"
    },
    {
      "id": "sf-building-permits",
      "name": "SF Dept. of Building Inspection via DataSF",
      "query": "https://data.sfgov.org/resource/i98e-djp9.json?block=3600&lot=099",
      "retrieved": "2026-07-28"
    },
    {
      "id": "sf-planning",
      "name": "SF Planning Department — Historic Resource Status by Parcel via DataSF",
      "query": "https://data.sfgov.org/resource/3tsw-4idn.json?apn=3600099",
      "retrieved": "2026-07-28"
    }
  ]
}