{
  "address": "4509 18th Street, San Francisco, CA 94114",
  "path": "/san-francisco/castro/18th-street/4509/",
  "apn": "2691045",
  "block": "2691",
  "lot": "045",
  "eas_baseid": "344278",
  "coordinates": {
    "lat": 37.760501,
    "lng": -122.439634
  },
  "parcel": {
    "year_built": 1900,
    "units": 1,
    "stories": 1,
    "rooms": 6,
    "bathrooms": 1,
    "lot_area_sqft": 2204,
    "building_area_sqft": 843,
    "use": "Single Family Residential",
    "property_class": "Dwelling",
    "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 4509 18TH                ST0000"
  },
  "assessment": {
    "roll_year": 2025,
    "assessed_land_value": 527386,
    "assessed_improvement_value": 414371
  },
  "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": "M294127",
      "type": "otc alterations permit",
      "status": "issued",
      "filed": "2011-12-29",
      "status_date": "2011-12-29",
      "revised_cost": 1,
      "description": "street space",
      "source": "sf-building-permits"
    },
    {
      "number": "M181006",
      "type": "otc alterations permit",
      "status": "issued",
      "filed": "2009-09-29",
      "status_date": "2009-09-29",
      "revised_cost": 1,
      "description": "street space permit",
      "source": "sf-building-permits"
    },
    {
      "number": "9215143",
      "type": "additions alterations or repairs",
      "status": "complete",
      "filed": "1992-09-03",
      "status_date": "1992-12-11",
      "estimated_cost": 5200,
      "description": "install 1 interior stair lift",
      "source": "sf-building-permits"
    },
    {
      "number": "8611523",
      "type": "additions alterations or repairs",
      "status": "complete",
      "filed": "1986-09-18",
      "status_date": "1987-04-29",
      "estimated_cost": 10000,
      "description": "horizontal extension, add sun room",
      "source": "sf-building-permits"
    },
    {
      "number": "8501285",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "1985-02-06",
      "status_date": "1985-03-28",
      "estimated_cost": 1500,
      "description": "place victorian trim on existing window door & paint",
      "source": "sf-building-permits"
    },
    {
      "number": "8408611",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "1984-08-08",
      "status_date": "1984-11-26",
      "estimated_cost": 850,
      "description": "repair dry rot at roof gutter",
      "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=4509",
      "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=2691045&$order=closed_roll_year%20DESC&$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=2691&lot=045",
      "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=2691045",
      "retrieved": "2026-07-28"
    },
    {
      "id": "corbett-heights-context-statement",
      "name": "Michael R. Corbett, Corbett Heights, San Francisco (Western Part of Eureka Valley) Historic Context Statement, prepared for Corbett Heights Neighbors and funded by the Historic Preservation Fund Committee, adopted by the San Francisco Historic Preservation Commission 16 August 2017 (Motion No. 0314, Case No. 2015-006003SRV)",
      "query": "http://default.sfplanning.org/Preservation/CorbettHeightsHCS/hp_corbett_hcs_HCS_FINAL-081617.pdf",
      "listing": "https://sfplanning.org/project/sf-histories-historic-context-statements#completed",
      "label": "Corbett Heights Historic Context Statement, adopted 2017",
      "retrieved": "2026-08-13"
    }
  ],
  "historic_survey": {
    "style": "Stick-Eastlake",
    "year_built_as_surveyed": 1890,
    "dcp_1976_survey": "Rated 0 of 5",
    "apn_as_surveyed": "block 2691, lot 45",
    "survey": "Corbett Heights Historic Context Statement (2017)",
    "source": "corbett-heights-context-statement",
    "note": "Listed among the properties the statement puts forward as meriting further study; it is a context statement rather than a survey, and says the list is conservative rather than exhaustive. The 1976 city architectural survey rated buildings 0 to 5, 5 highest, and was never adopted as a register of historic resources."
  }
}