{
  "address": "3750 21st Street, San Francisco, CA 94114",
  "path": "/san-francisco/castro/21st-street/3750/",
  "apn": "3604020",
  "block": "3604",
  "lot": "020",
  "eas_baseid": "362020",
  "coordinates": {
    "lat": 37.756535,
    "lng": -122.431276
  },
  "parcel": {
    "year_built": 1954,
    "units": 1,
    "stories": 3,
    "rooms": 7,
    "bathrooms": 3,
    "bedrooms": 3,
    "lot_area_sqft": 2848,
    "building_area_sqft": 3698,
    "basement_area_sqft": 1203,
    "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 3750 21ST                ST0000"
  },
  "assessment": {
    "roll_year": 2025,
    "assessed_land_value": 3150000,
    "assessed_improvement_value": 1350000,
    "last_sale_date": "2021-08-13"
  },
  "historic_status": {
    "ceqa_status_code": "C",
    "ceqa_status_code_article_10_11": "C",
    "ceqa_status_label": "Not a historical resource",
    "reason": "Historic Resource Evaluation Response",
    "yearbuilt": "1954",
    "in_article_10_11_historic_district": false,
    "source": "sf-planning"
  },
  "permits": [
    {
      "number": "202009164319",
      "type": "additions alterations or repairs",
      "status": "complete",
      "filed": "2020-09-16",
      "status_date": "2021-07-27",
      "estimated_cost": 20000,
      "revised_cost": 20000,
      "description": "scope includes adding a 274 sq ft roof deck. revision to permits #201508063603, #201904158039 & #202001282894. #201508063603 - original permit #201904158039 - revision to add sump pump #202001282894 - revision to front courtyard design & front utility fence.",
      "source": "sf-building-permits"
    },
    {
      "number": "202001282894",
      "type": "additions alterations or repairs",
      "status": "complete",
      "filed": "2020-01-28",
      "status_date": "2021-07-27",
      "estimated_cost": 50000,
      "revised_cost": 50000,
      "description": "revision to app#201904158039 and 201508063603 to add a parking screen, utility scress, change to front courtyard, and cover over entry deck",
      "source": "sf-building-permits"
    },
    {
      "number": "M1184488",
      "type": "otc alterations permit",
      "status": "issued",
      "filed": "2020-01-14",
      "status_date": "2020-01-14",
      "revised_cost": 1,
      "description": "street space",
      "source": "sf-building-permits"
    },
    {
      "number": "201906193812",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2019-06-19",
      "status_date": "2020-08-10",
      "estimated_cost": 5000,
      "revised_cost": 5000,
      "description": "installation of a dedicated function sprinkler monitoring system. ref pa 2019-0425-8905",
      "source": "sf-building-permits"
    },
    {
      "number": "M1081427",
      "type": "otc alterations permit",
      "status": "issued",
      "filed": "2019-05-16",
      "status_date": "2019-05-16",
      "revised_cost": 1,
      "description": "street space",
      "source": "sf-building-permits"
    },
    {
      "number": "201904258905",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2019-04-25",
      "status_date": "2020-08-06",
      "estimated_cost": 4000,
      "revised_cost": 29000,
      "description": "install new fire sprinlker through-out building per nfpa 13r with new u/g 2-inch provide new ddca 3\" single snoot dedicated service off of 8-inch main on 21st st. install 38 new fire sprinklers. ref pa201508063603.",
      "source": "sf-building-permits"
    },
    {
      "number": "201904158039",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2019-04-15",
      "status_date": "2021-07-27",
      "estimated_cost": 30000,
      "revised_cost": 30000,
      "description": "revision to pa #201508063603. temp shoring for excavation of basement sump pump. (added sump pit)",
      "source": "sf-building-permits"
    },
    {
      "number": "M920247",
      "type": "otc alterations permit",
      "status": "issued",
      "filed": "2018-04-30",
      "status_date": "2018-04-30",
      "revised_cost": 1,
      "description": "street space",
      "source": "sf-building-permits"
    },
    {
      "number": "M774947",
      "type": "otc alterations permit",
      "status": "issued",
      "filed": "2017-04-05",
      "status_date": "2017-04-05",
      "revised_cost": 1,
      "description": "street space",
      "source": "sf-building-permits"
    },
    {
      "number": "M710928",
      "type": "otc alterations permit",
      "status": "issued",
      "filed": "2016-08-04",
      "status_date": "2016-08-04",
      "revised_cost": 1,
      "description": "street space permit",
      "source": "sf-building-permits"
    },
    {
      "number": "M695088",
      "type": "otc alterations permit",
      "status": "issued",
      "filed": "2016-05-31",
      "status_date": "2016-05-31",
      "revised_cost": 0,
      "description": "street space",
      "source": "sf-building-permits"
    },
    {
      "number": "201512034106",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2015-12-03",
      "status_date": "2019-02-19",
      "estimated_cost": 20000,
      "revised_cost": 73000,
      "description": "temporary shoring for excavation for new basement as approved under permit application 2015-0806-3603",
      "source": "sf-building-permits"
    },
    {
      "number": "201508063603",
      "type": "additions alterations or repairs",
      "status": "complete",
      "filed": "2015-08-06",
      "status_date": "2021-07-29",
      "estimated_cost": 200000,
      "revised_cost": 590000,
      "description": "remodel of (e) 2 story sid, add basement, infill volume under 2nd story bay at rear. install nfpa-13r compliant fire sprinklers - under sep submittal.",
      "source": "sf-building-permits"
    },
    {
      "number": "201302250878",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2013-02-25",
      "status_date": "2013-03-08",
      "estimated_cost": 11000,
      "revised_cost": 11000,
      "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=21ST&street_type=ST&address_number=3750",
      "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=3604020&$order=closed_roll_year%20DESC&$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=020",
      "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=3604020",
      "retrieved": "2026-07-28"
    }
  ]
}