{
  "address": "3494 21st Street, San Francisco, CA 94110",
  "path": "/san-francisco/mission/21st-street/3494/",
  "apn": "3607023",
  "block": "3607",
  "lot": "023",
  "eas_baseid": "362244",
  "coordinates": {
    "lat": 37.756775,
    "lng": -122.425259
  },
  "parcel": {
    "year_built": 1910,
    "units": 1,
    "stories": 2,
    "rooms": 9,
    "bathrooms": 3,
    "bedrooms": 4,
    "lot_area_sqft": 2312.5,
    "building_area_sqft": 3257,
    "lot_depth_ft": 92.5,
    "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": "Mission",
    "property_location_raw": "0000 3494 21ST                ST0000"
  },
  "assessment": {
    "roll_year": 2025,
    "assessed_land_value": 4197077,
    "assessed_improvement_value": 1798747,
    "last_sale_date": "2022-06-07"
  },
  "historic_status": {
    "ceqa_status_code": "A",
    "ceqa_status_code_article_10_11": "A",
    "ceqa_status_label": "Historic resource",
    "reason": "Historic Resource Assessment",
    "yearbuilt": "1910",
    "in_article_10_11_historic_district": false,
    "source": "sf-planning"
  },
  "permits": [
    {
      "number": "M1161207",
      "type": "otc alterations permit",
      "status": "issued",
      "filed": "2019-11-04",
      "status_date": "2019-11-04",
      "revised_cost": 1,
      "description": "street space",
      "source": "sf-building-permits"
    },
    {
      "number": "M1130847",
      "type": "otc alterations permit",
      "status": "issued",
      "filed": "2019-08-29",
      "status_date": "2019-08-29",
      "revised_cost": 1,
      "description": "street space",
      "source": "sf-building-permits"
    },
    {
      "number": "M1100487",
      "type": "otc alterations permit",
      "status": "issued",
      "filed": "2019-06-25",
      "status_date": "2019-06-25",
      "revised_cost": 1,
      "description": "street space only",
      "source": "sf-building-permits"
    },
    {
      "number": "201906123256",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2019-06-12",
      "status_date": "2021-01-21",
      "estimated_cost": 5000,
      "revised_cost": 5000,
      "description": "rev to pa 201806081373; revision is to finish existing stair/new handrail",
      "source": "sf-building-permits"
    },
    {
      "number": "M1069447",
      "type": "otc alterations permit",
      "status": "issued",
      "filed": "2019-04-22",
      "status_date": "2019-04-22",
      "revised_cost": 0,
      "description": "street space",
      "source": "sf-building-permits"
    },
    {
      "number": "M1041807",
      "type": "otc alterations permit",
      "status": "issued",
      "filed": "2019-02-21",
      "status_date": "2019-02-21",
      "revised_cost": 0,
      "description": "street space",
      "source": "sf-building-permits"
    },
    {
      "number": "M1027607",
      "type": "otc alterations permit",
      "status": "issued",
      "filed": "2019-01-15",
      "status_date": "2019-01-15",
      "revised_cost": 1,
      "description": "street space",
      "source": "sf-building-permits"
    },
    {
      "number": "201812148414",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2018-12-14",
      "status_date": "2021-01-21",
      "estimated_cost": 3000,
      "revised_cost": 3000,
      "description": "revision to 201806081373 add a skylight above stair",
      "source": "sf-building-permits"
    },
    {
      "number": "M1016547",
      "type": "otc alterations permit",
      "status": "issued",
      "filed": "2018-12-12",
      "status_date": "2018-12-12",
      "revised_cost": 1,
      "description": "street space",
      "source": "sf-building-permits"
    },
    {
      "number": "M980147",
      "type": "otc alterations permit",
      "status": "issued",
      "filed": "2018-09-17",
      "status_date": "2018-09-17",
      "revised_cost": 1,
      "description": "street space",
      "source": "sf-building-permits"
    },
    {
      "number": "201806081373",
      "type": "otc alterations permit",
      "status": "issued",
      "filed": "2018-06-08",
      "status_date": "2018-06-18",
      "estimated_cost": 150000,
      "revised_cost": 150000,
      "description": "enlarge (e) kitchen, add new sliding door at dining room, move laundry upstairs, add new powder room downstairs, relocate 2 (e) windows to center of room, new entry door. mew gas fireplace, raise outdoor deck.",
      "source": "sf-building-permits"
    },
    {
      "number": "M592210",
      "type": "otc alterations permit",
      "status": "issued",
      "filed": "2015-06-02",
      "status_date": "2015-06-02",
      "revised_cost": 1,
      "description": "street space",
      "source": "sf-building-permits"
    },
    {
      "number": "201408083346",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2014-08-08",
      "status_date": "2015-11-23",
      "estimated_cost": 30000,
      "revised_cost": 30000,
      "description": "exterior remodel of an extg rear yard patio and 2nd floor deck over an extg garage. work shall include the construction of new stairs between levels, replacing the extg deck board and railing, replacing and heighting the rear yard fence, construction of new planters and refinishing of",
      "source": "sf-building-permits"
    },
    {
      "number": "201404284380",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2014-04-28",
      "status_date": "2016-02-16",
      "estimated_cost": 10000,
      "revised_cost": 10000,
      "description": "structural improvements to single story garage.",
      "source": "sf-building-permits"
    },
    {
      "number": "M413387",
      "type": "otc alterations permit",
      "status": "issued",
      "filed": "2013-08-01",
      "status_date": "2013-08-01",
      "revised_cost": 1,
      "description": "street street",
      "source": "sf-building-permits"
    },
    {
      "number": "201304255434",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2013-04-25",
      "status_date": "2015-11-06",
      "estimated_cost": 72000,
      "revised_cost": 72000,
      "description": "inter remodel including creation of large master suite on 2nd fl by combining 2 (e) bedrms & an (e) bathrm. work on 1st fl shall incude removal of (e) casework adjacent to (e) fireplace & inspection of a new vented gas fireplace. (e) fireplace surround to be refinished. repl (e) windows/handrails",
      "source": "sf-building-permits"
    },
    {
      "number": "M329987",
      "type": "otc alterations permit",
      "status": "issued",
      "filed": "2012-06-25",
      "status_date": "2012-06-25",
      "revised_cost": 1,
      "description": "street space",
      "source": "sf-building-permits"
    },
    {
      "number": "M292728",
      "type": "otc alterations permit",
      "status": "issued",
      "filed": "2011-12-13",
      "status_date": "2011-12-13",
      "revised_cost": 1,
      "description": "street space",
      "source": "sf-building-permits"
    },
    {
      "number": "201111148733",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2011-11-14",
      "status_date": "2012-04-26",
      "estimated_cost": 35301,
      "revised_cost": 35301,
      "description": "remodel 3 extg bathrooms. add door to garage at side from yard (not visible from street)repair extg rear stairs(not visible from street where work is done). general mep upgrades. add laundry room at kitchen. stair not a required exit.",
      "source": "sf-building-permits"
    },
    {
      "number": "201109305831",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2011-09-30",
      "status_date": "2012-04-26",
      "estimated_cost": 9700,
      "revised_cost": 9700,
      "description": "open wall between kitchen and dining. add beam and posts. remodel kitchen. remove non bearing wall at upstairs bedroom. add closet. widen misc closet doors. gen mep ugrades.",
      "source": "sf-building-permits"
    },
    {
      "number": "201109275611",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2011-09-27",
      "status_date": "2012-04-26",
      "estimated_cost": 1000,
      "revised_cost": 1000,
      "description": "remodel and replace kitchen cabinets and tile floor. some sheetrock about 20 sq ft on kitchen wall. for exploratory purpose. kitchen remodel will be under seperate permit.",
      "source": "sf-building-permits"
    },
    {
      "number": "9406049",
      "type": "otc alterations permit",
      "status": "expired",
      "filed": "1994-04-18",
      "status_date": "1995-02-06",
      "estimated_cost": 6500,
      "description": "reroofing",
      "source": "sf-building-permits"
    },
    {
      "number": "9004689",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "1990-03-09",
      "status_date": "1990-03-19",
      "estimated_cost": 5000,
      "description": "demo. of bbath wall, removal of existing fixtures & begin",
      "source": "sf-building-permits"
    },
    {
      "number": "8511219",
      "type": "additions alterations or repairs",
      "status": "complete",
      "filed": "1985-10-04",
      "status_date": "1986-03-21",
      "estimated_cost": 10000,
      "description": "replace kitchen cabinets and appliances",
      "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=3494",
      "retrieved": "2026-07-31"
    },
    {
      "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=3607023&$order=closed_roll_year%20DESC&$limit=1",
      "retrieved": "2026-07-31"
    },
    {
      "id": "sf-building-permits",
      "name": "SF Dept. of Building Inspection via DataSF",
      "query": "https://data.sfgov.org/resource/i98e-djp9.json?block=3607&lot=023",
      "retrieved": "2026-07-31"
    },
    {
      "id": "sf-planning",
      "name": "SF Planning Department — Historic Resource Status by Parcel via DataSF",
      "query": "https://data.sfgov.org/resource/3tsw-4idn.json?apn=3607023",
      "retrieved": "2026-07-31"
    },
    {
      "id": "sf-planning-commission-minutes-1970-05-07",
      "name": "San Francisco City Planning Commission, minutes of the regular meeting of 7 May 1970",
      "label": "San Francisco City Planning Commission minutes, San Francisco Public Library (Internet Archive)",
      "query": "https://archive.org/details/13minutesofsanfran1970sa/page/n144/mode/1up",
      "retrieved": "2026-10-09"
    }
  ],
  "historical_record": [
    {
      "date": "1968",
      "kind": "site history",
      "description": "The California Institute of Asian Studies began using the house for offices and classes, without zoning authorization.",
      "source": "sf-planning-commission-minutes-1970-05-07"
    },
    {
      "date": "1970-05-07",
      "kind": "planning decision",
      "description": "A single-family house on the corner was being used for offices and evening classes by the California Institute of Asian Studies, with about 110 students and 18 faculty. The City Planning Commission disapproved authorizing the California Institute of Asian Studies as an eleemosynary institution in the house, citing parking and the residential neighbourhood.",
      "source": "sf-planning-commission-minutes-1970-05-07"
    }
  ]
}