{
  "address": "3636 21st Street, San Francisco, CA 94114",
  "path": "/san-francisco/castro/21st-street/3636/",
  "apn": "3605016",
  "block": "3605",
  "lot": "016",
  "eas_baseid": "362088",
  "coordinates": {
    "lat": 37.756682,
    "lng": -122.428814
  },
  "parcel": {
    "year_built": 1905,
    "units": 1,
    "stories": 4,
    "rooms": 11,
    "bathrooms": 4,
    "bedrooms": 4,
    "lot_area_sqft": 2816.94,
    "building_area_sqft": 4605,
    "basement_area_sqft": 772,
    "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 3636 21ST                ST0000"
  },
  "assessment": {
    "roll_year": 2025,
    "assessed_land_value": 1995088,
    "assessed_improvement_value": 2482926,
    "last_sale_date": "2013-07-05"
  },
  "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": "1905",
    "in_article_10_11_historic_district": false,
    "source": "sf-planning"
  },
  "permits": [
    {
      "number": "202111092093",
      "type": "otc alterations permit",
      "status": "issued",
      "filed": "2021-11-09",
      "status_date": "2021-11-10",
      "estimated_cost": 20000,
      "revised_cost": 20000,
      "description": "replace interior finishes in kind at first floor and garden level floor. cabinets, closets & trim.",
      "source": "sf-building-permits"
    },
    {
      "number": "202110190755",
      "type": "otc alterations permit",
      "status": "issued",
      "filed": "2021-10-19",
      "status_date": "2021-10-19",
      "estimated_cost": 1,
      "revised_cost": 1,
      "description": "to obtain a final inspection for work approved under prevoius permits 201804136283 / 201811307174 / 201907186319. all work is complete.",
      "source": "sf-building-permits"
    },
    {
      "number": "202110190757",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2021-10-19",
      "status_date": "2021-11-12",
      "estimated_cost": 1,
      "revised_cost": 1,
      "description": "to obtain a final inspection for work approved under prevoius permits 201501155832 / 201708094331 / 201711274827. all work is complete.",
      "source": "sf-building-permits"
    },
    {
      "number": "202110180641",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2021-10-18",
      "status_date": "2021-11-10",
      "estimated_cost": 4000,
      "revised_cost": 6864,
      "description": "installation of a new sprinkler monitoring system. ref app#201811307174",
      "source": "sf-building-permits"
    },
    {
      "number": "202009023283",
      "type": "otc alterations permit",
      "status": "issued",
      "filed": "2020-09-02",
      "status_date": "2020-09-10",
      "estimated_cost": 1,
      "revised_cost": 3000,
      "description": "revision to pa #2015-0115-5832: revise lower 1-story residential stair (wood framed) to a poured in-place concrete stair.",
      "source": "sf-building-permits"
    },
    {
      "number": "M1188767",
      "type": "otc alterations permit",
      "status": "issued",
      "filed": "2020-01-30",
      "status_date": "2020-01-30",
      "revised_cost": 1,
      "description": "street space",
      "source": "sf-building-permits"
    },
    {
      "number": "201907186319",
      "type": "otc alterations permit",
      "status": "expired",
      "filed": "2019-07-18",
      "status_date": "2021-11-08",
      "estimated_cost": 1,
      "revised_cost": 1,
      "description": "revision to app#201501155832. revise main 2-story residential stair to a curved steel stair with steel plate stringer and winder treads.",
      "source": "sf-building-permits"
    },
    {
      "number": "M1111649",
      "type": "otc alterations permit",
      "status": "issued",
      "filed": "2019-07-18",
      "status_date": "2019-07-18",
      "revised_cost": 1,
      "description": "street space",
      "source": "sf-building-permits"
    },
    {
      "number": "201901251233",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2019-01-25",
      "status_date": "2019-12-17",
      "estimated_cost": 1,
      "revised_cost": 1,
      "description": "rev to pa# 20150115832; resolution of complaint 201801225 ienf (#20189972/201896523) plans indicate additional demo due to structural requirements and means & methods of construction",
      "source": "sf-building-permits"
    },
    {
      "number": "M1021707",
      "type": "otc alterations permit",
      "status": "issued",
      "filed": "2018-12-27",
      "status_date": "2018-12-27",
      "revised_cost": 0,
      "description": "street space",
      "source": "sf-building-permits"
    },
    {
      "number": "201811307174",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2018-11-30",
      "status_date": "2021-11-01",
      "estimated_cost": 30000,
      "revised_cost": 30000,
      "description": "install new fire sprinkler system per nfpa 13r throughout the bldg. included underground fire service. total 54 heads. ref app#201501155832",
      "source": "sf-building-permits"
    },
    {
      "number": "M938727",
      "type": "otc alterations permit",
      "status": "issued",
      "filed": "2018-06-13",
      "status_date": "2018-06-13",
      "revised_cost": 1,
      "description": "street space",
      "source": "sf-building-permits"
    },
    {
      "number": "201804136283",
      "type": "otc alterations permit",
      "status": "expired",
      "filed": "2018-04-13",
      "status_date": "2021-11-08",
      "estimated_cost": 1,
      "revised_cost": 1,
      "description": "change fire rated property line curtain wall assembly from tgp fire frame w/ pilkington pyrostop to vetrotech vds curtain wall w/ contraflam structure 601gu glazing. revision to #201501155832",
      "source": "sf-building-permits"
    },
    {
      "number": "M868487",
      "type": "otc alterations permit",
      "status": "issued",
      "filed": "2017-12-19",
      "status_date": "2017-12-19",
      "revised_cost": 1,
      "description": "street space permit",
      "source": "sf-building-permits"
    },
    {
      "number": "201711274827",
      "type": "otc alterations permit",
      "status": "expired",
      "filed": "2017-11-27",
      "status_date": "2021-11-08",
      "estimated_cost": 21000,
      "revised_cost": 21000,
      "description": "replace (e) retaining walls with new soldier pile walls. new concrete pation and hot tub. replace (e) fencing with new cedar fencing. all work in back",
      "source": "sf-building-permits"
    },
    {
      "number": "201708094331",
      "type": "otc alterations permit",
      "status": "expired",
      "filed": "2017-08-09",
      "status_date": "2021-11-08",
      "estimated_cost": 30000,
      "revised_cost": 30000,
      "description": "shoring plan related to bpa# 2015-0115-5832 s1.",
      "source": "sf-building-permits"
    },
    {
      "number": "M800347",
      "type": "otc alterations permit",
      "status": "issued",
      "filed": "2017-06-21",
      "status_date": "2017-06-21",
      "revised_cost": 0,
      "description": "streetspace",
      "source": "sf-building-permits"
    },
    {
      "number": "201501155832",
      "type": "additions alterations or repairs",
      "status": "expired",
      "filed": "2015-01-15",
      "status_date": "2021-11-08",
      "estimated_cost": 1000000,
      "revised_cost": 1000000,
      "description": "renovate & expand; horizontal add 2-story over basement by variance; vertical add; extend habitable space on (e) 3rd level; complete interior retrofit; roof terrace add; full seismic retrofit; fire sprinklers; property line windows per above; bldg envelop upgrades; facade improvement & restoration;",
      "source": "sf-building-permits"
    },
    {
      "number": "200011095288",
      "type": "otc alterations permit",
      "status": "expired",
      "filed": "2000-11-09",
      "status_date": "2001-05-09",
      "estimated_cost": 12231,
      "revised_cost": 12231,
      "description": "re roofing",
      "source": "sf-building-permits"
    },
    {
      "number": "9812559",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "1998-07-03",
      "status_date": "1998-07-08",
      "estimated_cost": 1,
      "description": "renew app#9802736",
      "source": "sf-building-permits"
    },
    {
      "number": "9802736",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "1998-02-18",
      "status_date": "1998-02-25",
      "estimated_cost": 5450,
      "description": "fireplace support & rebuild fireplace",
      "source": "sf-building-permits"
    },
    {
      "number": "9724364",
      "type": "otc alterations permit",
      "status": "expired",
      "filed": "1997-12-04",
      "status_date": "1998-07-08",
      "estimated_cost": 9700,
      "description": "remove lath/plaster livingrm/bathrm/hall/insulate/new shtroc",
      "source": "sf-building-permits"
    },
    {
      "number": "9722794",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "1997-11-12",
      "status_date": "1997-12-02",
      "estimated_cost": 2644,
      "description": "termite repair",
      "source": "sf-building-permits"
    },
    {
      "number": "9721524",
      "type": "otc alterations permit",
      "status": "expired",
      "filed": "1997-10-24",
      "status_date": "1998-07-08",
      "estimated_cost": 12231,
      "description": "reroofing",
      "source": "sf-building-permits"
    },
    {
      "number": "9509808",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "1995-06-27",
      "status_date": "1995-11-21",
      "estimated_cost": 8000,
      "description": "repair and replace rear roof tar and gravel repair deck",
      "source": "sf-building-permits"
    },
    {
      "number": "9405684",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "1994-04-12",
      "status_date": "1994-04-22",
      "estimated_cost": 1300,
      "description": "termite work",
      "source": "sf-building-permits"
    },
    {
      "number": "9014514",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "1990-07-23",
      "status_date": "1990-08-21",
      "estimated_cost": 2175,
      "description": "termite & dry rot repairs",
      "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=3636",
      "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=3605016&$order=closed_roll_year%20DESC&$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=3605&lot=016",
      "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=3605016",
      "retrieved": "2026-07-28"
    },
    {
      "id": "digitalsf-54805",
      "name": "3636 21st Street, between 1946 and 1951. San Francisco Office of Assessor-Recorder Photographs (SFP 23), San Francisco History Center, San Francisco Public Library.",
      "query": "https://digitalsf.org/record/54805",
      "label": "Assessor-Recorder Photographs (SFP 23), San Francisco Public Library",
      "retrieved": "2026-08-15"
    }
  ],
  "historical_record": [
    {
      "date": "between 1946 and 1951",
      "kind": "photograph",
      "description": "The Office of the Assessor-Recorder photographed the property for tax assessment.",
      "source": "digitalsf-54805"
    }
  ]
}