{
  "address": "4118 20th Street, San Francisco, CA 94114",
  "path": "/san-francisco/castro/20th-street/4118/",
  "apn": "3602019",
  "block": "3602",
  "lot": "019",
  "eas_baseid": "361847",
  "coordinates": {
    "lat": 37.75801,
    "lng": -122.433035
  },
  "parcel": {
    "year_built": 1905,
    "units": 1,
    "stories": 3,
    "rooms": 9,
    "bathrooms": 2,
    "bedrooms": 4,
    "lot_area_sqft": 2450,
    "building_area_sqft": 2287,
    "lot_depth_ft": 98,
    "use": "Single Family Residential",
    "property_class": "Dwelling",
    "construction_type_code": "D",
    "zoning": "RH-1",
    "supervisor_district": 8,
    "assessor_neighborhood": "Eureka Valley/Dolores Heights",
    "analysis_neighborhood": "Castro/Upper Market",
    "property_location_raw": "0000 4118 20TH                ST0000"
  },
  "assessment": {
    "roll_year": 2025,
    "assessed_land_value": 2413281,
    "assessed_improvement_value": 1034263,
    "last_sale_date": "2020-12-03"
  },
  "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": "1905",
    "in_article_10_11_historic_district": false,
    "source": "sf-planning"
  },
  "permits": [
    {
      "number": "202606304316",
      "type": "otc alterations permit",
      "status": "issued",
      "filed": "2026-06-30",
      "status_date": "2026-06-30",
      "estimated_cost": 15000,
      "revised_cost": 15000,
      "description": "patch sheetrock from electrical upgrade. new vanity and medicine cabinet on the 3rd floor bath",
      "source": "sf-building-permits"
    },
    {
      "number": "M925407",
      "type": "otc alterations permit",
      "status": "issued",
      "filed": "2018-05-10",
      "status_date": "2018-05-10",
      "revised_cost": 1,
      "description": "street space",
      "source": "sf-building-permits"
    },
    {
      "number": "201007227197",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2010-07-22",
      "status_date": "2010-12-17",
      "estimated_cost": 40000,
      "revised_cost": 65643,
      "description": "remodel 2nd fl bdrm to add closet, convert 2nd fl closet to 1/2 bath, remove portion of non structural wall between dining room and kitchen on 2nd fl, room addition on 1st fl to add 1 bedroom, 1 /2 bath and 1 closet. relocate laundry room to garbage area, replace/relocate wh,furnace,rmdl 2nd fl bath",
      "source": "sf-building-permits"
    },
    {
      "number": "200810164412",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2008-10-16",
      "status_date": "2009-04-29",
      "estimated_cost": 4200,
      "revised_cost": 4200,
      "description": "replace tub faucet & tile, replace tile floor & ped sink, all work to be like for like.",
      "source": "sf-building-permits"
    },
    {
      "number": "200810164414",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2008-10-16",
      "status_date": "2008-12-29",
      "estimated_cost": 3700,
      "revised_cost": 3700,
      "description": "replace front windows (7) like for like (double hung) aluminum wood clad.",
      "source": "sf-building-permits"
    },
    {
      "number": "200704178973",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2007-04-17",
      "status_date": "2007-05-01",
      "estimated_cost": 8600,
      "revised_cost": 8600,
      "description": "reroofing",
      "source": "sf-building-permits"
    },
    {
      "number": "9710336",
      "type": "additions alterations or repairs",
      "status": "complete",
      "filed": "1997-06-06",
      "status_date": "1997-09-09",
      "estimated_cost": 8000,
      "description": "vertical addition",
      "source": "sf-building-permits"
    },
    {
      "number": "9111877",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "1991-07-08",
      "status_date": "1991-10-10",
      "estimated_cost": 3038,
      "description": "repair dry rot",
      "source": "sf-building-permits"
    },
    {
      "number": "8809127",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "1988-07-06",
      "status_date": "1988-07-19",
      "estimated_cost": 1300,
      "description": "repair base of wall.",
      "source": "sf-building-permits"
    },
    {
      "number": "8806770",
      "type": "otc alterations permit",
      "status": "expired",
      "filed": "1988-05-23",
      "status_date": "1988-10-17",
      "estimated_cost": 450,
      "description": "resupport landing at front stairs.",
      "source": "sf-building-permits"
    },
    {
      "number": "8711323",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "1987-08-10",
      "status_date": "1988-01-26",
      "estimated_cost": 1500,
      "description": "sash repair/plaster patching/install new kitchen counters",
      "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=4118",
      "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=3602019&$order=closed_roll_year%20DESC&$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=3602&lot=019",
      "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=3602019",
      "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": "Altered",
    "year_built_as_surveyed": "1899",
    "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 single-storey end-gable dwelling with entry porch and bay window."
  },
  "building": {
    "builder": "Fernando Nelson"
  }
}