{
  "address": "3770 21st Street, San Francisco, CA 94114",
  "path": "/san-francisco/castro/21st-street/3770/",
  "apn": "3604024",
  "block": "3604",
  "lot": "024",
  "eas_baseid": "362024",
  "coordinates": {
    "lat": 37.756514,
    "lng": -122.431621
  },
  "parcel": {
    "year_built": 1909,
    "units": 1,
    "stories": 3,
    "rooms": 8,
    "bathrooms": 2,
    "bedrooms": 3,
    "lot_area_sqft": 2850,
    "building_area_sqft": 3137,
    "lot_depth_ft": 14,
    "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 3770 21ST                ST0000"
  },
  "assessment": {
    "roll_year": 2025,
    "assessed_land_value": 1553158,
    "assessed_improvement_value": 665632,
    "last_sale_date": "2013-07-31"
  },
  "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": "1909",
    "in_article_10_11_historic_district": false,
    "source": "sf-planning"
  },
  "permits": [
    {
      "number": "201303152333",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2013-03-15",
      "status_date": "2013-03-27",
      "estimated_cost": 1,
      "revised_cost": 1,
      "description": "to obtain final inspection for work approved under app#200712069877. all work is complete.",
      "source": "sf-building-permits"
    },
    {
      "number": "201303152336",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2013-03-15",
      "status_date": "2013-03-27",
      "estimated_cost": 1,
      "revised_cost": 1,
      "description": "to obtain final inspection for work approved under app#200711278933. all work is complete.",
      "source": "sf-building-permits"
    },
    {
      "number": "200907021869",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2009-07-02",
      "status_date": "2010-05-17",
      "estimated_cost": 15000,
      "revised_cost": 15000,
      "description": "revision to appl #200905138322 - front stair & porch repair, w/structural detail. new siding & replace aluminum porch windows & replace wooden gate with wooden door on front of house.",
      "source": "sf-building-permits"
    },
    {
      "number": "200905138322",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2009-05-13",
      "status_date": "2010-05-17",
      "estimated_cost": 2000,
      "revised_cost": 2000,
      "description": "replace front stairtreads, structural supprots to remain as is.",
      "source": "sf-building-permits"
    },
    {
      "number": "200712069877",
      "type": "otc alterations permit",
      "status": "expired",
      "filed": "2007-12-06",
      "status_date": "2010-03-18",
      "estimated_cost": 150,
      "revised_cost": 150,
      "description": "revision to appl #200711278933: using shotcrete instead of concrete.",
      "source": "sf-building-permits"
    },
    {
      "number": "200711278933",
      "type": "otc alterations permit",
      "status": "expired",
      "filed": "2007-11-27",
      "status_date": "2010-03-18",
      "estimated_cost": 3000,
      "revised_cost": 3000,
      "description": "widening the footing base/underpinning to accomodate new foundation work under applic.#2007-04-23-9388.",
      "source": "sf-building-permits"
    },
    {
      "number": "200710246312",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2007-10-24",
      "status_date": "2007-11-08",
      "estimated_cost": 1,
      "revised_cost": 1,
      "description": "renew for final only 200504140044.",
      "source": "sf-building-permits"
    },
    {
      "number": "M67204",
      "type": "otc alterations permit",
      "status": "issued",
      "filed": "2007-05-04",
      "status_date": "2007-05-04",
      "revised_cost": 0,
      "description": "street space permit",
      "source": "sf-building-permits"
    },
    {
      "number": "M62367",
      "type": "otc alterations permit",
      "status": "issued",
      "filed": "2007-04-02",
      "status_date": "2007-04-02",
      "revised_cost": 0,
      "description": "street space",
      "source": "sf-building-permits"
    },
    {
      "number": "M59747",
      "type": "otc alterations permit",
      "status": "issued",
      "filed": "2007-03-07",
      "status_date": "2007-03-07",
      "revised_cost": 0,
      "description": "street space",
      "source": "sf-building-permits"
    },
    {
      "number": "M57984",
      "type": "otc alterations permit",
      "status": "issued",
      "filed": "2007-02-16",
      "status_date": "2007-02-16",
      "revised_cost": 0,
      "description": "street space permit only.",
      "source": "sf-building-permits"
    },
    {
      "number": "M53843",
      "type": "otc alterations permit",
      "status": "issued",
      "filed": "2007-01-11",
      "status_date": "2007-01-12",
      "revised_cost": 0,
      "description": "street space & sidewalk permit only.",
      "source": "sf-building-permits"
    },
    {
      "number": "M41382",
      "type": "otc alterations permit",
      "status": "issued",
      "filed": "2006-09-11",
      "status_date": "2006-09-11",
      "revised_cost": 0,
      "description": "sidewalk repair",
      "source": "sf-building-permits"
    },
    {
      "number": "M40403",
      "type": "otc alterations permit",
      "status": "issued",
      "filed": "2006-08-30",
      "status_date": "2006-08-30",
      "revised_cost": 0,
      "description": "street space permit",
      "source": "sf-building-permits"
    },
    {
      "number": "M38007",
      "type": "otc alterations permit",
      "status": "issued",
      "filed": "2006-06-09",
      "status_date": "2006-06-09",
      "revised_cost": 0,
      "description": "street space permit",
      "source": "sf-building-permits"
    },
    {
      "number": "200504140044",
      "type": "additions alterations or repairs",
      "status": "expired",
      "filed": "2005-04-14",
      "status_date": "2007-11-08",
      "estimated_cost": 250000,
      "revised_cost": 250000,
      "description": "rear yard addition including kch, dining room renovation at 1st fl/recreation room at grnd flr",
      "source": "sf-building-permits"
    },
    {
      "number": "9008490",
      "type": "additions alterations or repairs",
      "status": "cancelled",
      "filed": "1990-05-03",
      "status_date": "1994-01-07",
      "estimated_cost": 2000,
      "description": "replace decks in back of house",
      "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=21ST&street_type=ST&address_number=3770",
      "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=3604024&$order=closed_roll_year%20DESC&$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=3604&lot=024",
      "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=3604024",
      "retrieved": "2026-07-28"
    }
  ]
}