{
  "address": "4137–4139 20th Street, San Francisco, CA 94114",
  "path": "/san-francisco/castro/20th-street/4137/",
  "apn": "3603085",
  "block": "3603",
  "lot": "085",
  "eas_baseid": "361992",
  "coordinates": {
    "lat": 37.757524,
    "lng": -122.433331
  },
  "address_range": "4137–4139",
  "street_numbers_on_parcel": [
    "4137",
    "4139"
  ],
  "parcel": {
    "year_built": 1900,
    "units": 2,
    "stories": 2,
    "rooms": 10,
    "bathrooms": 2,
    "bedrooms": 4,
    "lot_area_sqft": 2848,
    "building_area_sqft": 2294,
    "use": "Multi-Family Residential",
    "property_class": "TIC Bldg 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": "4139 4137 20TH                ST0000"
  },
  "assessment": {
    "roll_year": 2025,
    "assessed_land_value": 1331389,
    "assessed_improvement_value": 887593,
    "last_sale_date": "1991-03-22"
  },
  "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",
    "in_article_10_11_historic_district": false,
    "source": "sf-planning"
  },
  "permits": [
    {
      "number": "202206297406",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2022-06-29",
      "status_date": "2022-11-08",
      "estimated_cost": 75000,
      "revised_cost": 75000,
      "description": "to comply with physical inspection report #cc-8560",
      "source": "sf-building-permits"
    },
    {
      "number": "202106041649",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2021-06-04",
      "status_date": "2022-06-14",
      "estimated_cost": 15000,
      "revised_cost": 15000,
      "description": "bathroom remodel like for like with shower, no layout or wall changes.",
      "source": "sf-building-permits"
    },
    {
      "number": "201211063583",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2012-11-06",
      "status_date": "2012-12-21",
      "estimated_cost": 16975,
      "revised_cost": 16975,
      "description": "reroofing",
      "source": "sf-building-permits"
    },
    {
      "number": "200007195547",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2000-07-19",
      "status_date": "2000-09-19",
      "estimated_cost": 5293,
      "revised_cost": 5293,
      "description": "reroofing",
      "source": "sf-building-permits"
    },
    {
      "number": "9708103",
      "type": "additions alterations or repairs",
      "status": "complete",
      "filed": "1997-05-05",
      "status_date": "1997-09-30",
      "estimated_cost": 10000,
      "description": "vertical addition",
      "source": "sf-building-permits"
    },
    {
      "number": "9115697",
      "type": "additions alterations or repairs",
      "status": "complete",
      "filed": "1991-08-29",
      "status_date": "1991-12-19",
      "estimated_cost": 35000,
      "description": "remodel kitchen",
      "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=4137",
      "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=3603085&$order=closed_roll_year%20DESC&$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=3603&lot=085",
      "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=3603085",
      "retrieved": "2026-07-28"
    },
    {
      "id": "eureka-valley-context-statement",
      "name": "Elaine B. Stiles, Eureka Valley Historic Context Statement, prepared for the Eureka Valley Neighborhood Association, adopted by the Historic Preservation Commission December 20, 2017",
      "query": "http://default.sfplanning.org/Preservation/EurekaValleyHCS/hp_eureka_valley_hcs_HCS_FINAL-122017.pdf",
      "listing": "https://sfplanning.org/project/sf-histories-historic-context-statements#completed",
      "label": "Eureka Valley Historic Context Statement, adopted 2017",
      "retrieved": "2026-08-14"
    }
  ],
  "historic_survey": {
    "survey": "Eureka Valley Historic Context Statement (2017)",
    "source": "eureka-valley-context-statement",
    "style": "Stick, altered",
    "year_built_as_surveyed": "1898",
    "note": "Listed among the houses Fernando Nelson built in Eureka Valley. The statement is reconnaissance-level and says inclusion in it is not a judgement on a building's worthiness for preservation. It records it as a two-flat."
  },
  "building": {
    "builder": "Fernando Nelson"
  }
}