{
  "address": "4020 18th Street, San Francisco, CA 94114",
  "path": "/san-francisco/castro/18th-street/4020/",
  "apn": "3582019",
  "block": "3582",
  "lot": "019",
  "eas_baseid": "360696",
  "coordinates": {
    "lat": 37.761214,
    "lng": -122.433342
  },
  "parcel": {
    "year_built": 1900,
    "units": 1,
    "stories": 3,
    "rooms": 7,
    "bathrooms": 3,
    "bedrooms": 3,
    "lot_area_sqft": 2495,
    "building_area_sqft": 2560,
    "basement_area_sqft": 712,
    "use": "Single Family Residential",
    "property_class": "Dwelling",
    "construction_type_code": "D",
    "zoning": "RH-3",
    "supervisor_district": 8,
    "assessor_neighborhood": "Eureka Valley/Dolores Heights",
    "analysis_neighborhood": "Castro/Upper Market",
    "property_location_raw": "0000 4020 18TH                ST0000"
  },
  "assessment": {
    "roll_year": 2025,
    "assessed_land_value": 2079967,
    "assessed_improvement_value": 891414,
    "last_sale_date": "2022-06-13"
  },
  "historic_status": {
    "ceqa_status_code": "B",
    "ceqa_status_code_article_10_11": "B",
    "ceqa_status_label": "Unevaluated",
    "reason": "Historic Survey Result and 45 years or older",
    "yearbuilt": "1900",
    "in_article_10_11_historic_district": false,
    "source": "sf-planning"
  },
  "permits": [
    {
      "number": "202307192484",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2023-07-19",
      "status_date": "2023-08-22",
      "estimated_cost": 5000,
      "revised_cost": 5000,
      "description": "replace (e) skylight in kind.replace in existing opening, not visible from street. u factor 0.55 max.",
      "source": "sf-building-permits"
    },
    {
      "number": "202306230696",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2023-06-23",
      "status_date": "2024-01-09",
      "estimated_cost": 20000,
      "revised_cost": 20000,
      "description": "bathrroom remodel: installing new vanity, toilet, shower hardware, new tile on floor and walls, new lighting. no changes to existing walls. approx 80 sqft",
      "source": "sf-building-permits"
    },
    {
      "number": "M767129",
      "type": "otc alterations permit",
      "status": "issued",
      "filed": "2017-03-09",
      "status_date": "2017-03-09",
      "revised_cost": 1,
      "description": "street space",
      "source": "sf-building-permits"
    },
    {
      "number": "M753187",
      "type": "otc alterations permit",
      "status": "issued",
      "filed": "2017-01-09",
      "status_date": "2017-01-09",
      "revised_cost": 1,
      "description": "street space permit",
      "source": "sf-building-permits"
    },
    {
      "number": "201412093407",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2014-12-09",
      "status_date": "2015-02-05",
      "estimated_cost": 37000,
      "revised_cost": 37000,
      "description": "remove existing lath & plaster @ g/f, inspect existing electrical, plumbing, framing, ducts-flue, revise any work that was not done to code, all revisions to existing to meet current code. no structural work.",
      "source": "sf-building-permits"
    },
    {
      "number": "201404112996",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2014-04-11",
      "status_date": "2015-01-27",
      "estimated_cost": 50000,
      "revised_cost": 70000,
      "description": "kitchen remodel to replace cabinets, appliances & finishes, selective demolitoin, reconfigure rear facing window & door. documentation of (e) conditions of ground floor including bedroom, bathroom & living area.",
      "source": "sf-building-permits"
    },
    {
      "number": "9808638",
      "type": "additions alterations or repairs",
      "status": "cancelled",
      "filed": "2002-08-30",
      "status_date": "2002-08-30",
      "estimated_cost": 150000,
      "description": "addition of 3 stories to rear & raise roof 5'/new wall frame",
      "source": "sf-building-permits"
    },
    {
      "number": "9920576",
      "type": "otc alterations permit",
      "status": "expired",
      "filed": "1999-09-29",
      "status_date": "2000-06-06",
      "estimated_cost": 4500,
      "description": "replace old fireplace w/superior zero clearence k3800",
      "source": "sf-building-permits"
    },
    {
      "number": "9817586",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "1998-09-02",
      "status_date": "1999-04-22",
      "estimated_cost": 7000,
      "description": "new cabinets & fixtures in (e) kitchen & 3 bath patch",
      "source": "sf-building-permits"
    },
    {
      "number": "9117297",
      "type": "otc alterations permit",
      "status": "expired",
      "filed": "1991-09-18",
      "status_date": "1992-07-23",
      "estimated_cost": 4800,
      "description": "remove all existing roof, install plywood, felt, shingles",
      "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=18TH&street_type=ST&address_number=4020",
      "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=3582019&$order=closed_roll_year%20DESC&$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=3582&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=3582019",
      "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": "1901",
    "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"
  }
}