{
  "address": "4220–4222 18th Street, San Francisco, CA 94114",
  "path": "/san-francisco/castro/18th-street/4220/",
  "apn": "2648017",
  "block": "2648",
  "lot": "017",
  "eas_baseid": "343230",
  "coordinates": {
    "lat": 37.760988,
    "lng": -122.436538
  },
  "address_range": "4220–4222",
  "street_numbers_on_parcel": [
    "4220",
    "4222"
  ],
  "parcel": {
    "year_built": 1902,
    "units": 2,
    "stories": 3,
    "rooms": 14,
    "bathrooms": 5,
    "bedrooms": 6,
    "lot_area_sqft": 1873,
    "building_area_sqft": 5219,
    "use": "Multi-Family Residential",
    "property_class": "Flats & Duplex",
    "construction_type_code": "D",
    "zoning": "CASTRO",
    "supervisor_district": 8,
    "assessor_neighborhood": "Eureka Valley/Dolores Heights",
    "analysis_neighborhood": "Castro/Upper Market",
    "property_location_raw": "4222 4220 18TH                ST0000"
  },
  "assessment": {
    "roll_year": 2025,
    "assessed_land_value": 784822,
    "assessed_improvement_value": 723611,
    "last_sale_date": "2003-12-24"
  },
  "historic_status": {
    "ceqa_status_code": "A",
    "ceqa_status_code_article_10_11": "A",
    "ceqa_status_label": "Historic resource",
    "reason": "California Register Historic District, Historic Survey Result",
    "yearbuilt": "1902",
    "in_article_10_11_historic_district": false,
    "source": "sf-planning"
  },
  "historic_district": {
    "name": "L. Arthur 18th Street Flats Historic District",
    "california_register_status": "Eligible (not listed)",
    "national_register_status": "Not listed",
    "article_10_11_status": "No local landmark protection",
    "local_landmark_protection": false,
    "period_of_significance": "1904",
    "source": "sf-historic-districts"
  },
  "permits": [
    {
      "number": "M1138427",
      "type": "otc alterations permit",
      "status": "issued",
      "filed": "2019-09-13",
      "status_date": "2019-09-13",
      "revised_cost": 1,
      "description": "street space",
      "source": "sf-building-permits"
    },
    {
      "number": "201605268463",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2016-05-26",
      "status_date": "2016-10-25",
      "estimated_cost": 1,
      "revised_cost": 1,
      "description": "to clarify 4-story, 2 units on 4 floors of occupancy under pa#2015.1217.5402.",
      "source": "sf-building-permits"
    },
    {
      "number": "201604124517",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2016-04-12",
      "status_date": "2016-10-11",
      "estimated_cost": 5000,
      "revised_cost": 8000,
      "description": "relocate (e) bathroom, (e) closet and add furnace on attic floor.",
      "source": "sf-building-permits"
    },
    {
      "number": "201602058945",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2016-02-05",
      "status_date": "2016-06-23",
      "estimated_cost": 5000,
      "revised_cost": 8000,
      "description": "convert existing closet into half bath with vanity & shower on 3rd floor for one unit",
      "source": "sf-building-permits"
    },
    {
      "number": "201512175402",
      "type": "otc alterations permit",
      "status": "issued",
      "filed": "2015-12-17",
      "status_date": "2016-03-04",
      "estimated_cost": 50000,
      "revised_cost": 83000,
      "description": "add 2 bedrooms, 1 entertainment room, 1 full bath on attic per plan",
      "source": "sf-building-permits"
    },
    {
      "number": "201512114837",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2015-12-11",
      "status_date": "2016-06-28",
      "estimated_cost": 11250,
      "revised_cost": 11250,
      "description": "replace current kitchen cabinetss and sink. replace windows of deck in the back.",
      "source": "sf-building-permits"
    },
    {
      "number": "200909086332",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2009-09-08",
      "status_date": "2009-10-28",
      "estimated_cost": 500,
      "revised_cost": 500,
      "description": "comply with nov 200920774. repair rear deck porch. tenants put the old rail back @ exterior stairway.repair rotten landing wood on back deck. repair heat vents. repair back door/frame and porch door. less than 50% in kind.",
      "source": "sf-building-permits"
    },
    {
      "number": "200904226847",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2009-04-22",
      "status_date": "2009-08-14",
      "estimated_cost": 20000,
      "revised_cost": 20000,
      "description": "to complete work and obtain final inspection for work approved under pa 200711168382",
      "source": "sf-building-permits"
    },
    {
      "number": "200811267438",
      "type": "otc alterations permit",
      "status": "cancelled",
      "filed": "2008-11-26",
      "status_date": "2026-01-27",
      "estimated_cost": 30000,
      "revised_cost": 143000,
      "description": "convert basement parking to retail use. city planning approved motion# 17719, case #20080179c, no heating install for ground fl, change in occupancy from u-1/r-3 to m.",
      "source": "sf-building-permits"
    },
    {
      "number": "200711168382",
      "type": "otc alterations permit",
      "status": "issued",
      "filed": "2007-11-16",
      "status_date": "2007-11-16",
      "estimated_cost": 20000,
      "revised_cost": 20000,
      "description": "new family room and new bathroom at garage level. new communicating stairs between new family room and second floor",
      "source": "sf-building-permits"
    },
    {
      "number": "200702134034",
      "type": "additions alterations or repairs",
      "status": "complete",
      "filed": "2007-02-13",
      "status_date": "2007-09-04",
      "estimated_cost": 2000,
      "revised_cost": 15000,
      "description": "convert living room to hair salon. fill in door opening, add sink & elec outlet. change of use, r3 to b.",
      "source": "sf-building-permits"
    },
    {
      "number": "200410015744",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2004-10-01",
      "status_date": "2004-11-17",
      "estimated_cost": 3000,
      "revised_cost": 3000,
      "description": "convert a closet on 2nd floor into a half bath with a water closet and lavatory.",
      "source": "sf-building-permits"
    },
    {
      "number": "200110231473",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2001-10-23",
      "status_date": "2001-10-30",
      "estimated_cost": 1,
      "revised_cost": 1,
      "description": "rev to 20011004996 (rebuild (e)stairs",
      "source": "sf-building-permits"
    },
    {
      "number": "200110049961",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2001-10-04",
      "status_date": "2001-10-30",
      "estimated_cost": 5000,
      "revised_cost": 5000,
      "description": "repair (e) stairs",
      "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=4220",
      "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=2648017&$order=closed_roll_year%20DESC&$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=2648&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=2648017",
      "retrieved": "2026-07-28"
    },
    {
      "id": "sf-historic-districts",
      "name": "SF Planning Department — Historic Districts via DataSF",
      "query": "https://data.sfgov.org/resource/63x5-g3m4.json?$where=intersects(the_geom,%20%27POINT(-122.43653797816576%2037.76098843605605)%27)",
      "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",
    "note": "Illustrated in the statement's survey of Eureka Valley property types and architectural styles. 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 on the end-gable dwelling form, now in commercial use."
  }
}