{
  "address": "4307–4309 20th Street, San Francisco, CA 94114",
  "path": "/san-francisco/castro/20th-street/4307/",
  "apn": "2751026",
  "block": "2751",
  "lot": "026",
  "eas_baseid": "345521",
  "coordinates": {
    "lat": 37.757382,
    "lng": -122.436106
  },
  "address_range": "4307–4309",
  "street_numbers_on_parcel": [
    "4307",
    "4309"
  ],
  "parcel": {
    "year_built": 1915,
    "units": 2,
    "stories": 4,
    "rooms": 9,
    "bathrooms": 4,
    "bedrooms": 3,
    "lot_area_sqft": 2437.5,
    "building_area_sqft": 2934,
    "lot_depth_ft": 97.5,
    "use": "Multi-Family Residential",
    "property_class": "Flats & Duplex",
    "construction_type_code": "D",
    "zoning": "RH-3",
    "supervisor_district": 8,
    "assessor_neighborhood": "Eureka Valley/Dolores Heights",
    "analysis_neighborhood": "Castro/Upper Market",
    "property_location_raw": "4309 4307 20TH                ST0000"
  },
  "assessment": {
    "roll_year": 2025,
    "assessed_land_value": 2230143,
    "assessed_improvement_value": 1402816,
    "last_sale_date": "2017-10-27"
  },
  "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": "1915",
    "in_article_10_11_historic_district": false,
    "source": "sf-planning"
  },
  "permits": [
    {
      "number": "202106011399",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2021-06-01",
      "status_date": "2021-12-29",
      "estimated_cost": 20400,
      "revised_cost": 20400,
      "description": "replacement of (e) guardrail at entry stair and 1/f. north patio. (n) in-swing gate at sidewalk.relace (e) stone surface at (e) stair and patio.",
      "source": "sf-building-permits"
    },
    {
      "number": "202105039673",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2021-05-03",
      "status_date": "2021-09-27",
      "estimated_cost": 6500,
      "revised_cost": 6500,
      "description": "replace in kind interior stairs from garage level to 1st fl. like for like in kind",
      "source": "sf-building-permits"
    },
    {
      "number": "M1204629",
      "type": "otc alterations permit",
      "status": "issued",
      "filed": "2020-03-12",
      "status_date": "2020-03-12",
      "revised_cost": 1,
      "description": "street space",
      "source": "sf-building-permits"
    },
    {
      "number": "M1185095",
      "type": "otc alterations permit",
      "status": "issued",
      "filed": "2020-01-17",
      "status_date": "2020-01-17",
      "revised_cost": 1,
      "description": "street space",
      "source": "sf-building-permits"
    },
    {
      "number": "201905019457",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2019-05-01",
      "status_date": "2020-09-28",
      "estimated_cost": 22600,
      "revised_cost": 25000,
      "description": "new rear yard retaining wall, concrete stairs @ grade and guardrail",
      "source": "sf-building-permits"
    },
    {
      "number": "201804055565",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2018-04-05",
      "status_date": "2020-09-28",
      "estimated_cost": 305000,
      "revised_cost": 350000,
      "description": "interior remodel from ground flr to 3rd flr. replacement of existing windows throughout front facade. replacing railing at front porch and stair leading from sidewalk to match wood bannister. interior remodel including new interior stair, 3 bath remodels, expand kitchen and livingspace",
      "source": "sf-building-permits"
    },
    {
      "number": "201803163897",
      "type": "additions alterations or repairs",
      "status": "complete",
      "filed": "2018-03-16",
      "status_date": "2020-09-28",
      "estimated_cost": 56000,
      "revised_cost": 175000,
      "description": "conversion of exterior 3rd fl rear site permit. yard (south) deck to interior living space & removal of stair to rear yard. (n) cantilever deck & exterior spiral staircase @ 3rd fl rear facade. no overall increase in bldg depth or height.",
      "source": "sf-building-permits"
    },
    {
      "number": "201705237397",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2017-05-23",
      "status_date": "2017-07-31",
      "estimated_cost": 4500,
      "revised_cost": 4500,
      "description": "remodel kitchen. n/a for maher.",
      "source": "sf-building-permits"
    },
    {
      "number": "200109057624",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2001-09-05",
      "status_date": "2001-09-14",
      "estimated_cost": 3000,
      "revised_cost": 3000,
      "description": "revision to pa#9917330",
      "source": "sf-building-permits"
    },
    {
      "number": "200106121300",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2001-06-12",
      "status_date": "2001-09-14",
      "estimated_cost": 1,
      "revised_cost": 1,
      "description": "renew expired permit 9914436 & 9917330 for final inspectoin.",
      "source": "sf-building-permits"
    },
    {
      "number": "9917330",
      "type": "additions alterations or repairs",
      "status": "expired",
      "filed": "1999-08-19",
      "status_date": "2001-06-06",
      "estimated_cost": 1,
      "revised_cost": 1,
      "source": "sf-building-permits"
    },
    {
      "number": "9914436",
      "type": "additions alterations or repairs",
      "status": "expired",
      "filed": "1999-07-16",
      "status_date": "2000-07-28",
      "estimated_cost": 55000,
      "description": "new garage at front of building",
      "source": "sf-building-permits"
    },
    {
      "number": "9909151S",
      "type": "additions alterations or repairs",
      "status": "withdrawn",
      "filed": "1999-05-10",
      "status_date": "1999-08-16",
      "estimated_cost": 55000,
      "description": "add new garage with room above,at rear of 2 story unit",
      "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=4307",
      "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=2751026&$order=closed_roll_year%20DESC&$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=2751&lot=026",
      "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=2751026",
      "retrieved": "2026-07-28"
    }
  ]
}