{
  "address": "3540–3542 21st Street, San Francisco, CA 94114",
  "path": "/san-francisco/castro/21st-street/3540/",
  "apn": "3606020",
  "block": "3606",
  "lot": "020",
  "eas_baseid": "362175",
  "coordinates": {
    "lat": 37.756813,
    "lng": -122.426674
  },
  "address_range": "3540–3542",
  "street_numbers_on_parcel": [
    "3540",
    "3542"
  ],
  "parcel": {
    "year_built": 1900,
    "rooms": 6,
    "bathrooms": 2,
    "bedrooms": 2,
    "lot_area_sqft": 2848,
    "building_area_sqft": 2500,
    "use": "Single Family Residential",
    "property_class": "Dwelling",
    "construction_type_code": "NA",
    "zoning": "RH-2",
    "supervisor_district": 8,
    "assessor_neighborhood": "Eureka Valley/Dolores Heights",
    "analysis_neighborhood": "Castro/Upper Market",
    "property_location_raw": "3542 3540 21ST                ST0000"
  },
  "assessment": {
    "roll_year": 2025,
    "assessed_land_value": 70666,
    "assessed_improvement_value": 155457
  },
  "historic_status": {
    "ceqa_status_code": "B",
    "ceqa_status_code_article_10_11": "B",
    "ceqa_status_label": "Unevaluated",
    "reason": "Historic Survey Result and 45 years or older",
    "yearbuilt": "1900",
    "in_article_10_11_historic_district": false,
    "source": "sf-planning"
  },
  "permits": [
    {
      "number": "9612408",
      "type": "otc alterations permit",
      "status": "expired",
      "filed": "1996-07-11",
      "status_date": "1997-11-20",
      "estimated_cost": 20000,
      "description": "repair tile stairway,wood sash windows,rot at deck,ceiling",
      "source": "sf-building-permits"
    },
    {
      "number": "9024424",
      "type": "additions alterations or repairs",
      "status": "complete",
      "filed": "1990-11-30",
      "status_date": "1991-03-05",
      "estimated_cost": 1,
      "description": "elimination of drain pipe behind retaining wall rev #9020325",
      "source": "sf-building-permits"
    },
    {
      "number": "9020325",
      "type": "additions alterations or repairs",
      "status": "complete",
      "filed": "1990-10-04",
      "status_date": "1991-07-18",
      "estimated_cost": 15000,
      "description": "new foundation along front side and new retaining walls",
      "source": "sf-building-permits"
    },
    {
      "number": "8508616",
      "type": "additions alterations or repairs",
      "status": "complete",
      "filed": "1985-08-09",
      "status_date": "1986-03-17",
      "estimated_cost": 35000,
      "description": "interior remodel",
      "source": "sf-building-permits"
    },
    {
      "number": "8204944",
      "type": "additions alterations or repairs",
      "status": "complete",
      "filed": "1982-06-17",
      "status_date": "1983-03-04",
      "estimated_cost": 6000,
      "description": "bldg use: flats",
      "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=3540",
      "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=3606020&$order=closed_roll_year%20DESC&$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=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=3606020",
      "retrieved": "2026-07-28"
    }
  ]
}