{
  "address": "4407–4409 20th Street, San Francisco, CA 94114",
  "path": "/san-francisco/castro/20th-street/4407/",
  "apn": "2750044",
  "block": "2750",
  "lot": "044",
  "eas_baseid": "345484",
  "coordinates": {
    "lat": 37.757322,
    "lng": -122.437101
  },
  "address_range": "4407–4409",
  "street_numbers_on_parcel": [
    "4407",
    "4409"
  ],
  "parcel": {
    "year_built": 1900,
    "units": 3,
    "stories": 3,
    "rooms": 12,
    "bathrooms": 5,
    "bedrooms": 4,
    "lot_area_sqft": 2435,
    "building_area_sqft": 3133,
    "use": "Multi-Family Residential",
    "property_class": "Flats & Duplex",
    "construction_type_code": "D",
    "zoning": "RH-2",
    "supervisor_district": 8,
    "assessor_neighborhood": "Eureka Valley/Dolores Heights",
    "analysis_neighborhood": "Castro/Upper Market",
    "property_location_raw": "4409 4407 20TH                ST0000"
  },
  "assessment": {
    "roll_year": 2025,
    "assessed_land_value": 1360784,
    "assessed_improvement_value": 1159240,
    "last_sale_date": "2016-10-20"
  },
  "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": "1900",
    "in_article_10_11_historic_district": false,
    "source": "sf-planning"
  },
  "permits": [
    {
      "number": "202009083685",
      "type": "otc alterations permit",
      "status": "issued",
      "filed": "2020-09-08",
      "status_date": "2020-09-22",
      "estimated_cost": 2000,
      "revised_cost": 3111,
      "description": "sprinkler flow monitoring",
      "source": "sf-building-permits"
    },
    {
      "number": "202008262712",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2020-08-26",
      "status_date": "2021-08-04",
      "estimated_cost": 60000,
      "revised_cost": 60000,
      "description": "interior remodel of 3rd fl apartment unit including new bathroom, new kitchen island, and remodel existing bathroom.",
      "source": "sf-building-permits"
    },
    {
      "number": "202003025898",
      "type": "otc alterations permit",
      "status": "issued",
      "filed": "2020-03-02",
      "status_date": "2020-03-03",
      "estimated_cost": 7000,
      "revised_cost": 10800,
      "description": "installation of sprinkler system per nfra 13 at ground fl. (n) unit and related egress pa# 201812198794. total 12 sprinkler heads.",
      "source": "sf-building-permits"
    },
    {
      "number": "M1174668",
      "type": "otc alterations permit",
      "status": "issued",
      "filed": "2019-12-11",
      "status_date": "2019-12-11",
      "revised_cost": 1,
      "description": "street space",
      "source": "sf-building-permits"
    },
    {
      "number": "201907196356",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2019-07-19",
      "status_date": "2020-08-19",
      "estimated_cost": 50000,
      "revised_cost": 60000,
      "description": "revision to voluntary seismic retrofit 2018-0525-0265 due to change in engineering and engineer of record and layour of shear walls. this permit cost is for the additional structural work for the adu only (lower slab & replace foundation).",
      "source": "sf-building-permits"
    },
    {
      "number": "201904047133",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2019-04-04",
      "status_date": "2020-08-19",
      "estimated_cost": 60000,
      "revised_cost": 118833,
      "description": "remodel 2nd fl apartment unit. replace existing rear windows.",
      "source": "sf-building-permits"
    },
    {
      "number": "201812198794",
      "type": "additions alterations or repairs",
      "status": "complete",
      "filed": "2018-12-19",
      "status_date": "2020-08-19",
      "estimated_cost": 95000,
      "revised_cost": 95000,
      "description": "add unit per ord #162-16. remodel ground floor to accommodate 1 new studio apartment unit. soft story permit is approved & issued 201805250265.",
      "source": "sf-building-permits"
    },
    {
      "number": "201805250265",
      "type": "otc alterations permit",
      "status": "issued",
      "filed": "2018-05-25",
      "status_date": "2018-12-21",
      "estimated_cost": 64600,
      "revised_cost": 64600,
      "description": "voluntary seismic uprade per ab 094",
      "source": "sf-building-permits"
    },
    {
      "number": "201712015297",
      "type": "otc alterations permit",
      "status": "cancelled",
      "filed": "2017-12-01",
      "status_date": "2026-01-09",
      "estimated_cost": 21500,
      "revised_cost": 35700,
      "description": "create new office by opening wall. remodel kitchen",
      "source": "sf-building-permits"
    },
    {
      "number": "201710121037",
      "type": "otc alterations permit",
      "status": "withdrawn",
      "filed": "2017-10-12",
      "status_date": "2018-06-01",
      "estimated_cost": 18000,
      "revised_cost": 0,
      "description": "install structural moment frame.",
      "source": "sf-building-permits"
    },
    {
      "number": "201702028490",
      "type": "otc alterations permit",
      "status": "issued",
      "filed": "2017-02-02",
      "status_date": "2017-02-02",
      "estimated_cost": 15000,
      "revised_cost": 15000,
      "description": "pull/replace bathroom, 5'x12'",
      "source": "sf-building-permits"
    },
    {
      "number": "201412194192",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2014-12-19",
      "status_date": "2015-12-15",
      "estimated_cost": 16500,
      "revised_cost": 16500,
      "description": "reroofing",
      "source": "sf-building-permits"
    },
    {
      "number": "201006295533",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2010-06-29",
      "status_date": "2010-09-15",
      "estimated_cost": 15000,
      "revised_cost": 15000,
      "description": "repair e rear deck, add new windows, doors, skylights to e rear room. replace e rear stairs in kind",
      "source": "sf-building-permits"
    },
    {
      "number": "200105239856",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2001-05-23",
      "status_date": "2001-11-14",
      "estimated_cost": 40000,
      "revised_cost": 40000,
      "description": "stairs replacement and garage entrance replacement",
      "source": "sf-building-permits"
    },
    {
      "number": "9215868",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "1992-09-15",
      "status_date": "1992-09-30",
      "estimated_cost": 4500,
      "description": "shearing of cellar walls tie down of sill plate",
      "source": "sf-building-permits"
    },
    {
      "number": "9111049",
      "type": "otc alterations permit",
      "status": "expired",
      "filed": "1991-06-24",
      "status_date": "1992-07-14",
      "estimated_cost": 7000,
      "description": "reroofing",
      "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=4407",
      "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=2750044&$order=closed_roll_year%20DESC&$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=2750&lot=044",
      "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=2750044",
      "retrieved": "2026-07-28"
    }
  ]
}