{
  "address": "4110 20th Street, San Francisco, CA 94114",
  "path": "/san-francisco/castro/20th-street/4110/",
  "apn": "3602017",
  "block": "3602",
  "lot": "017",
  "eas_baseid": "361845",
  "coordinates": {
    "lat": 37.758021,
    "lng": -122.432862
  },
  "parcel": {
    "year_built": 1905,
    "units": 1,
    "stories": 2,
    "rooms": 8,
    "bathrooms": 2,
    "bedrooms": 3,
    "lot_area_sqft": 2450,
    "building_area_sqft": 1472,
    "basement_area_sqft": 177,
    "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 4110 20TH                ST0000"
  },
  "assessment": {
    "roll_year": 2025,
    "assessed_land_value": 1304873,
    "assessed_improvement_value": 593360,
    "last_sale_date": "2011-06-21"
  },
  "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": "202211156541",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2022-11-15",
      "status_date": "2023-04-26",
      "estimated_cost": 14500,
      "revised_cost": 14500,
      "description": "one 48 sq ft full bathroom remodel on 2nd floor. no structural, no changes to walls or openings. replace (e) with (n) curbed shower, toilet and vanity. all (n) fixtures and finishes- in kind.",
      "source": "sf-building-permits"
    },
    {
      "number": "201702240087",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2017-02-24",
      "status_date": "2017-10-13",
      "estimated_cost": 20000,
      "revised_cost": 30000,
      "description": "demo & replace kitchen counters, cabinets & fixtures. new 1/2 bath on 1st flr. new finished floor",
      "source": "sf-building-permits"
    },
    {
      "number": "201105055410",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2011-05-05",
      "status_date": "2011-05-06",
      "estimated_cost": 1,
      "revised_cost": 1,
      "description": "to obtain final inspection for work approved under pa#200505021347 all work is complete.",
      "source": "sf-building-permits"
    },
    {
      "number": "201103142066",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2011-03-14",
      "status_date": "2011-05-06",
      "estimated_cost": 10800,
      "revised_cost": 10800,
      "description": "remodel of upstairs bathroom, install new tub, vanity, toilet, tile tub surround & floor. no structural work.",
      "source": "sf-building-permits"
    },
    {
      "number": "200609192634",
      "type": "otc alterations permit",
      "status": "expired",
      "filed": "2006-09-19",
      "status_date": "2009-01-20",
      "estimated_cost": 8280,
      "revised_cost": 8280,
      "description": "reroofing",
      "source": "sf-building-permits"
    },
    {
      "number": "200505021347",
      "type": "otc alterations permit",
      "status": "expired",
      "filed": "2005-05-02",
      "status_date": "2011-05-06",
      "estimated_cost": 10000,
      "revised_cost": 10000,
      "description": "replace 10 windows, size for size, wood to wood composite, visible from street",
      "source": "sf-building-permits"
    },
    {
      "number": "9818737",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "1998-09-17",
      "status_date": "2000-04-25",
      "estimated_cost": 5500,
      "description": "reroofing",
      "source": "sf-building-permits"
    },
    {
      "number": "9619604",
      "type": "otc alterations permit",
      "status": "expired",
      "filed": "1996-10-11",
      "status_date": "1997-02-11",
      "estimated_cost": 1500,
      "description": "repair damage to rear deck like kind",
      "source": "sf-building-permits"
    },
    {
      "number": "8801832",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "1988-02-16",
      "status_date": "1988-07-15",
      "estimated_cost": 2500,
      "description": "installation of a marco dwf-36cf pre-fa fireplace.",
      "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=4110",
      "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=3602017&$order=closed_roll_year%20DESC&$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=017",
      "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=3602017",
      "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": "Queen Anne",
    "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"
  }
}