{
  "address": "3570 21st Street, San Francisco, CA 94114",
  "path": "/san-francisco/castro/21st-street/3570/",
  "apn": "3606024",
  "block": "3606",
  "lot": "024",
  "eas_baseid": "362178",
  "coordinates": {
    "lat": 37.756782,
    "lng": -122.427173
  },
  "parcel": {
    "year_built": 1908,
    "units": 1,
    "stories": 2,
    "rooms": 10,
    "bathrooms": 2,
    "bedrooms": 4,
    "lot_area_sqft": 5697,
    "building_area_sqft": 3000,
    "use": "Single Family Residential",
    "property_class": "Dwelling",
    "construction_type_code": "D",
    "zoning": "RM-1",
    "supervisor_district": 8,
    "assessor_neighborhood": "Eureka Valley/Dolores Heights",
    "analysis_neighborhood": "Castro/Upper Market",
    "property_location_raw": "0000 3570 21ST                ST0000"
  },
  "assessment": {
    "roll_year": 2025,
    "assessed_land_value": 5077562,
    "assessed_improvement_value": 2329095,
    "last_sale_date": "2016-09-30"
  },
  "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": "1908",
    "in_article_10_11_historic_district": false,
    "source": "sf-planning"
  },
  "permits": [
    {
      "number": "202410012048",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2024-10-01",
      "status_date": "2024-11-07",
      "estimated_cost": 1500,
      "revised_cost": 3105,
      "description": "install 5 additional sprinklers to cover new storage area as built ref pa 202305238427",
      "source": "sf-building-permits"
    },
    {
      "number": "202405162262",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2024-05-16",
      "status_date": "2024-11-07",
      "estimated_cost": 21000,
      "revised_cost": 21000,
      "description": "fire sprinkler monitoring system.",
      "source": "sf-building-permits"
    },
    {
      "number": "202305238427",
      "type": "additions alterations or repairs",
      "status": "complete",
      "filed": "2023-05-23",
      "status_date": "2024-11-21",
      "estimated_cost": 53000,
      "revised_cost": 53000,
      "description": "garage extension, excavation & construction, increase height of retaining wall.",
      "source": "sf-building-permits"
    },
    {
      "number": "202303224186",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2023-03-22",
      "status_date": "2025-01-22",
      "estimated_cost": 100000,
      "revised_cost": 100000,
      "description": "new outdoor pg&e alcove with new gate for access. new relocated retaining wall.",
      "source": "sf-building-permits"
    },
    {
      "number": "202301069740",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2023-01-06",
      "status_date": "2024-11-07",
      "estimated_cost": 41000,
      "revised_cost": 53600,
      "description": "residential f/s system - (63) sprinklers, new 2\" underground - 19 feet. ref apn#202208150537",
      "source": "sf-building-permits"
    },
    {
      "number": "202208150537",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2022-08-15",
      "status_date": "2024-11-21",
      "estimated_cost": 20000,
      "revised_cost": 30000,
      "description": "rev to pa# 2021-0525-1031 & 2021-0713-4237: design change to (w) pl fence, t24, in kind replacement of windows, replace sheathing as needed on (e) (w),(s) walls partial framing and drywall replacement, revised rcp, (n) roofing, structural revisions",
      "source": "sf-building-permits"
    },
    {
      "number": "202107134237",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2021-07-13",
      "status_date": "2024-11-21",
      "estimated_cost": 30000,
      "revised_cost": 30000,
      "description": "rear addition of sun room on 1st and 2nd levles. approx 83 sf per level. no encrochment in required yard, within allowable buildalbe area. limited structural work.",
      "source": "sf-building-permits"
    },
    {
      "number": "202105251031",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2021-05-25",
      "status_date": "2024-11-21",
      "estimated_cost": 145000,
      "revised_cost": 145000,
      "description": "interior remodel w/in (e) bldg; (n) front gate (n) fence along west property line. limited structural work; limited work in rear yard.",
      "source": "sf-building-permits"
    },
    {
      "number": "201901180725",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2019-01-18",
      "status_date": "2019-05-30",
      "estimated_cost": 50000,
      "revised_cost": 50000,
      "description": "add new electrical and lights in kitchen. replace a few cabinets and add new countertops",
      "source": "sf-building-permits"
    },
    {
      "number": "201302120002",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2013-02-12",
      "status_date": "2013-03-12",
      "estimated_cost": 1,
      "revised_cost": 1,
      "description": "to obtain a final inspection for work approved under pa# 200903315244. all work is complete",
      "source": "sf-building-permits"
    },
    {
      "number": "201302129999",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2013-02-12",
      "status_date": "2014-03-17",
      "estimated_cost": 1,
      "revised_cost": 1,
      "description": "to obtain final inspection for work approved under pa# 200707126615. all work is complete",
      "source": "sf-building-permits"
    },
    {
      "number": "M192665",
      "type": "otc alterations permit",
      "status": "issued",
      "filed": "2010-03-09",
      "status_date": "2010-03-09",
      "revised_cost": 1,
      "description": "street space permit",
      "source": "sf-building-permits"
    },
    {
      "number": "200911242064",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2009-11-24",
      "status_date": "2009-12-02",
      "estimated_cost": 8000,
      "revised_cost": 8000,
      "description": "increae cost of valuation pa# 200812158535 by $ 8.000 per district building inspector request.",
      "source": "sf-building-permits"
    },
    {
      "number": "M182145",
      "type": "otc alterations permit",
      "status": "issued",
      "filed": "2009-10-15",
      "status_date": "2009-10-15",
      "revised_cost": 1,
      "description": "street space permit",
      "source": "sf-building-permits"
    },
    {
      "number": "200907202961",
      "type": "otc alterations permit",
      "status": "expired",
      "filed": "2009-07-20",
      "status_date": "2013-02-01",
      "estimated_cost": 75000,
      "revised_cost": 75000,
      "description": "to complete & finalize work under app#2007/07/12/6615. special inspection required.",
      "source": "sf-building-permits"
    },
    {
      "number": "M170686",
      "type": "otc alterations permit",
      "status": "issued",
      "filed": "2009-06-30",
      "status_date": "2009-06-30",
      "revised_cost": 1,
      "description": "street space",
      "source": "sf-building-permits"
    },
    {
      "number": "200903315244",
      "type": "otc alterations permit",
      "status": "expired",
      "filed": "2009-03-31",
      "status_date": "2013-02-01",
      "estimated_cost": 15000,
      "revised_cost": 42500,
      "description": "temporary shoring and under pinning for the excavation and construction of the proposed new underground garage. super structure and foundation work under pa# 2007.07.12.6615 s1.",
      "source": "sf-building-permits"
    },
    {
      "number": "200812158535",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2008-12-15",
      "status_date": "2009-12-02",
      "estimated_cost": 15000,
      "revised_cost": 15000,
      "description": "explore front of building for dryrot, leaks remove existing siding, replace waterproofing, replace siding \"in like\" and \" in kind\" at facade only. approx 300 sqft.",
      "source": "sf-building-permits"
    },
    {
      "number": "200707126615",
      "type": "additions alterations or repairs",
      "status": "expired",
      "filed": "2007-07-12",
      "status_date": "2013-02-01",
      "estimated_cost": 50000,
      "revised_cost": 80000,
      "description": "new concrete garage structure at front of property. new concrete deck over garage - associated foundation work. deck over garage will not connect to house will be independent.",
      "source": "sf-building-permits"
    },
    {
      "number": "200506165209",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2005-06-16",
      "status_date": "2006-03-17",
      "estimated_cost": 15000,
      "revised_cost": 15000,
      "description": "replace selected windows alumin. to wood @rear & right side,replace (e)deck @ground level rear with",
      "source": "sf-building-permits"
    },
    {
      "number": "200504079365",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2005-04-07",
      "status_date": "2006-02-28",
      "estimated_cost": 23000,
      "revised_cost": 23000,
      "description": "foundation replacement from brick to concrete as indicated on plans.",
      "source": "sf-building-permits"
    },
    {
      "number": "200503258416",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2005-03-25",
      "status_date": "2006-02-28",
      "estimated_cost": 150000,
      "revised_cost": 150000,
      "description": "remodel kitchen-new cabinets,fixtures.remodel laundry room on 1/f-new cabinets & appliances.",
      "source": "sf-building-permits"
    },
    {
      "number": "9915105",
      "type": "additions alterations or repairs",
      "status": "expired",
      "filed": "1999-07-23",
      "status_date": "2001-03-20",
      "estimated_cost": 18000,
      "description": "horizontal addition",
      "source": "sf-building-permits"
    },
    {
      "number": "9311797",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "1993-07-13",
      "status_date": "1993-09-14",
      "estimated_cost": 3200,
      "description": "remodel bathroom",
      "source": "sf-building-permits"
    },
    {
      "number": "8703081",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "1987-03-09",
      "status_date": "1988-07-28",
      "estimated_cost": 30000,
      "description": "fro increased valve of work & final inspection",
      "source": "sf-building-permits"
    },
    {
      "number": "8609341",
      "type": "otc alterations permit",
      "status": "expired",
      "filed": "1986-08-01",
      "status_date": "1987-03-03",
      "estimated_cost": 6000,
      "description": "redo rough in plumbing & provide new bath fixtures",
      "source": "sf-building-permits"
    },
    {
      "number": "8609178",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "1986-07-29",
      "status_date": "1987-03-03",
      "estimated_cost": 1910,
      "description": "replace fungus & beetle damaged wood balcony at front bldg",
      "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=3570",
      "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=3606024&$order=closed_roll_year%20DESC&$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=3606&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=3606024",
      "retrieved": "2026-07-28"
    }
  ]
}