{
  "address": "3977 20th Street, San Francisco, CA 94114",
  "path": "/san-francisco/castro/20th-street/3977/",
  "apn": "3605056",
  "block": "3605",
  "lot": "056",
  "eas_baseid": "362130",
  "coordinates": {
    "lat": 37.757746,
    "lng": -122.429664
  },
  "parcel": {
    "year_built": 1928,
    "units": 1,
    "stories": 1,
    "rooms": 7,
    "bathrooms": 2,
    "bedrooms": 3,
    "lot_area_sqft": 2850,
    "building_area_sqft": 2511,
    "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 3977 20TH                ST0000"
  },
  "assessment": {
    "roll_year": 2025,
    "assessed_land_value": 2317677,
    "assessed_improvement_value": 1172810,
    "last_sale_date": "2021-10-25"
  },
  "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": "1928",
    "in_article_10_11_historic_district": false,
    "source": "sf-planning"
  },
  "permits": [
    {
      "number": "202506098271",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2025-06-09",
      "status_date": "2025-06-11",
      "estimated_cost": 1,
      "revised_cost": 1,
      "description": "to obtain final inspection for work approved under pa202203079387. all work is complete.",
      "source": "sf-building-permits"
    },
    {
      "number": "202408128467",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2024-08-12",
      "status_date": "2024-09-13",
      "estimated_cost": 1,
      "revised_cost": 1,
      "description": "to obtain final inspection for work approved under pa#: 202206307542, 202207229183 and 202207299593 all work is complete",
      "source": "sf-building-permits"
    },
    {
      "number": "202211237176",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2022-11-23",
      "status_date": "2024-09-13",
      "estimated_cost": 1,
      "revised_cost": 1,
      "description": "construction revision to previously approved pa# 202207229183 to clarify shearwall nailing schedules. no change to interior layouts or exterior/occupancy.",
      "source": "sf-building-permits"
    },
    {
      "number": "202207299593",
      "type": "otc alterations permit",
      "status": "expired",
      "filed": "2022-07-29",
      "status_date": "2024-09-13",
      "estimated_cost": 1,
      "revised_cost": 1,
      "description": "revision to 202207229183 and 202211237176 to reduce scope of seismic upgrade work prior to final framing inspection before sheetrock coverup. no change to (e) layouts nor exterior or occupancy",
      "source": "sf-building-permits"
    },
    {
      "number": "202207229183",
      "type": "otc alterations permit",
      "status": "expired",
      "filed": "2022-07-22",
      "status_date": "2024-09-13",
      "estimated_cost": 16000,
      "revised_cost": 16000,
      "description": "revision to bpa#202206307542 to add gradebeam work w/new plywood wall nailing schedule & add 25' reinforced concrete foundation. no change toccupancy/exterior conditions, interior work only",
      "source": "sf-building-permits"
    },
    {
      "number": "202206307542",
      "type": "otc alterations permit",
      "status": "expired",
      "filed": "2022-06-30",
      "status_date": "2024-09-13",
      "estimated_cost": 62000,
      "revised_cost": 98000,
      "description": "remodel of extg 2 story, single family dwelling. interior remodel with voluntary seismic upgrade to include widening garage at front and infill extg lightwell. no changes to extg bldg nor occupancy.",
      "source": "sf-building-permits"
    },
    {
      "number": "202205194621",
      "type": "additions alterations or repairs",
      "status": "withdrawn",
      "filed": "2022-05-19",
      "status_date": "2022-06-29",
      "estimated_cost": 62000,
      "description": "no change to (e) building envelope. remode (e) 2 story wood frame sfd. expansion of (e) garage with (e) building envelope. interior remodel icluding removal/replace/relocation of misc. interior partitions & expansion of door openings. expansion of (e) bathroom on ground floor.",
      "source": "sf-building-permits"
    },
    {
      "number": "202203079387",
      "type": "otc alterations permit",
      "status": "expired",
      "filed": "2022-03-07",
      "status_date": "2025-06-11",
      "estimated_cost": 21500,
      "revised_cost": 26500,
      "description": "interior remodel of an existing 2 story wood frame sfr including: removal / replacement/relocation of miscellaneous fixtures, faucets and appliances in (2) bathrooms and (1) kitchen. relocation of miscellaneous interior door and wall openings.",
      "source": "sf-building-permits"
    },
    {
      "number": "201004069682",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2010-04-06",
      "status_date": "2010-08-12",
      "estimated_cost": 15500,
      "revised_cost": 15500,
      "description": "repair and replace (e) foundation , and install 39' of new foundation at rear portion of the building",
      "source": "sf-building-permits"
    },
    {
      "number": "200206078466",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2002-06-07",
      "status_date": "2002-06-18",
      "estimated_cost": 6000,
      "revised_cost": 6000,
      "description": "install french drain tied into catch basin and sump pumped into sewer system",
      "source": "sf-building-permits"
    },
    {
      "number": "9500446",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "1995-01-12",
      "status_date": "1995-05-12",
      "estimated_cost": 1400,
      "description": "sill plate bolting, expansion bolts spaced, plywood",
      "source": "sf-building-permits"
    },
    {
      "number": "9311864",
      "type": "otc alterations permit",
      "status": "expired",
      "filed": "1993-07-14",
      "status_date": "1993-11-30",
      "estimated_cost": 3900,
      "description": "reroof",
      "source": "sf-building-permits"
    },
    {
      "number": "9007807",
      "type": "additions alterations or repairs",
      "status": "cancelled",
      "filed": "1990-04-25",
      "status_date": "1990-11-30",
      "estimated_cost": 600,
      "description": "install wood rail on deck and fill in to 6\" space",
      "source": "sf-building-permits"
    },
    {
      "number": "8900964",
      "type": "additions alterations or repairs",
      "status": "complete",
      "filed": "1989-01-20",
      "status_date": "1990-07-10",
      "estimated_cost": 6000,
      "description": "horizontal addition",
      "source": "sf-building-permits"
    },
    {
      "number": "8816342",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "1988-10-21",
      "status_date": "1989-05-12",
      "estimated_cost": 10000,
      "description": "remove oll kitchen cabinets",
      "source": "sf-building-permits"
    },
    {
      "number": "8502671",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "1985-03-15",
      "status_date": "1985-04-15",
      "estimated_cost": 1443,
      "description": "dryrot repair",
      "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=20TH&street_type=ST&address_number=3977",
      "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=3605056&$order=closed_roll_year%20DESC&$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=056",
      "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=3605056",
      "retrieved": "2026-07-28"
    }
  ]
}