{
  "address": "3500 21st Street, San Francisco, CA 94114",
  "path": "/san-francisco/castro/21st-street/3500/",
  "apn": "3606013",
  "block": "3606",
  "lot": "013",
  "eas_baseid": "362168",
  "coordinates": {
    "lat": 37.756771,
    "lng": -122.425936
  },
  "parcel": {
    "year_built": 1905,
    "units": 1,
    "stories": 2,
    "rooms": 8,
    "bathrooms": 3,
    "bedrooms": 3,
    "lot_area_sqft": 3090,
    "building_area_sqft": 2981,
    "basement_area_sqft": 784,
    "lot_depth_ft": 60,
    "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": "Castro/Upper Market",
    "property_location_raw": "0000 3500 21ST                ST0000"
  },
  "assessment": {
    "roll_year": 2025,
    "assessed_land_value": 3570000,
    "assessed_improvement_value": 1530000,
    "last_sale_date": "2022-08-09"
  },
  "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": "1905",
    "in_article_10_11_historic_district": false,
    "source": "sf-planning"
  },
  "permits": [
    {
      "number": "202606173378",
      "type": "otc alterations permit",
      "status": "issued",
      "filed": "2026-06-17",
      "status_date": "2026-06-18",
      "estimated_cost": 15000,
      "revised_cost": 15000,
      "description": "revision to bpa#202504174601. heating & cooling systems changed to 2 outdoor heat pumps with ducted multi-split system. domestic hot water heater revised to be heat pump water heater cf1r, rms-1 doucments updated to reflect these changes.",
      "source": "sf-building-permits"
    },
    {
      "number": "202504174601",
      "type": "otc alterations permit",
      "status": "issued",
      "filed": "2025-04-17",
      "status_date": "2025-12-10",
      "estimated_cost": 257293,
      "revised_cost": 257293,
      "description": "1/fl- excavation and conversion of non habitiable space to conditioned habitable space. addition of (n) bedroom, laundry room, and office. minor remodel to (e) kitchen and living room at 2/fl. remodel (e) primary closet and (e) office on 3/fl. install (n) skylight in modified roof framing.",
      "source": "sf-building-permits"
    },
    {
      "number": "202310269594",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2023-10-26",
      "status_date": "2024-12-20",
      "estimated_cost": 32000,
      "revised_cost": 32000,
      "description": "remove trellis, replace guardrail on deck & new rear yard step",
      "source": "sf-building-permits"
    },
    {
      "number": "M524267",
      "type": "otc alterations permit",
      "status": "issued",
      "filed": "2014-10-06",
      "status_date": "2014-10-06",
      "revised_cost": 1,
      "description": "street space",
      "source": "sf-building-permits"
    },
    {
      "number": "201404153302",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2014-04-15",
      "status_date": "2015-06-29",
      "estimated_cost": 9000,
      "revised_cost": 9000,
      "description": "revision to pa#201202154257 to include extension of previously permitted 1/f deck, replace wood windows in kind along 21 street & dolores st sides, new window at previously permitted addition & revise skylight at main roof.",
      "source": "sf-building-permits"
    },
    {
      "number": "M475727",
      "type": "otc alterations permit",
      "status": "issued",
      "filed": "2014-03-31",
      "status_date": "2014-03-31",
      "revised_cost": 1,
      "description": "street space",
      "source": "sf-building-permits"
    },
    {
      "number": "201403211326",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2014-03-21",
      "status_date": "2014-04-04",
      "estimated_cost": 8680,
      "revised_cost": 8680,
      "description": "for re-roofing work.completely remove and/or tear off old roofing materials and hauls away all debris.apply 1 ply of polyglass base sheet and nail down to existing sheathing board.and treat the surface of the roof with special granulated modified bitumen and one-ply system. roof slope less than 2:12",
      "source": "sf-building-permits"
    },
    {
      "number": "M438907",
      "type": "otc alterations permit",
      "status": "issued",
      "filed": "2013-10-28",
      "status_date": "2013-10-28",
      "revised_cost": 1,
      "description": "street space permit (201202154257)",
      "source": "sf-building-permits"
    },
    {
      "number": "201202154257",
      "type": "additions alterations or repairs",
      "status": "complete",
      "filed": "2012-02-15",
      "status_date": "2015-06-29",
      "estimated_cost": 79500,
      "revised_cost": 140000,
      "description": "horizontal three story addition at rear of house. new exterior deck at rear of house. interior remodel of (e) kitchen & two (e) bathrooms convert (e) third floor laundry room to office & closets. replace select windows. convert ground floor to basement",
      "source": "sf-building-permits"
    },
    {
      "number": "M198150",
      "type": "otc alterations permit",
      "status": "reinstated",
      "filed": "2010-04-19",
      "status_date": "2010-05-14",
      "revised_cost": 0,
      "description": "sidewalk repair",
      "source": "sf-building-permits"
    },
    {
      "number": "M45542",
      "type": "otc alterations permit",
      "status": "issued",
      "filed": "2006-10-19",
      "status_date": "2006-10-19",
      "revised_cost": 0,
      "description": "street space",
      "source": "sf-building-permits"
    },
    {
      "number": "9801847",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "1998-02-03",
      "status_date": "1998-02-12",
      "estimated_cost": 1,
      "description": "renew 9613445",
      "source": "sf-building-permits"
    },
    {
      "number": "9711362",
      "type": "additions alterations or repairs",
      "status": "complete",
      "filed": "1997-06-20",
      "status_date": "1998-02-02",
      "estimated_cost": 20000,
      "description": "revision to 9613445,rebuild pop-out vs repair pop-out",
      "source": "sf-building-permits"
    },
    {
      "number": "9613445S",
      "type": "additions alterations or repairs",
      "status": "expired",
      "filed": "1996-07-24",
      "status_date": "1998-02-03",
      "estimated_cost": 10000,
      "description": "relocate stair / remodel breakfast room",
      "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=3500",
      "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=3606013&$order=closed_roll_year%20DESC&$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=013",
      "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=3606013",
      "retrieved": "2026-07-28"
    }
  ]
}