{
  "address": "4249–4251 20th Street, San Francisco, CA 94114",
  "path": "/san-francisco/castro/20th-street/4249/",
  "apn": "2752027",
  "block": "2752",
  "lot": "027",
  "eas_baseid": "345561",
  "coordinates": {
    "lat": 37.757529,
    "lng": -122.435653
  },
  "address_range": "4249–4251",
  "street_numbers_on_parcel": [
    "4249",
    "4251"
  ],
  "parcel": {
    "year_built": 1906,
    "units": 4,
    "stories": 3,
    "rooms": 15,
    "bathrooms": 5,
    "bedrooms": 5,
    "lot_area_sqft": 2748,
    "building_area_sqft": 4296,
    "use": "Multi-Family Residential",
    "property_class": "Apartment 4 units or less",
    "construction_type_code": "D",
    "zoning": "RH-3",
    "supervisor_district": 8,
    "assessor_neighborhood": "Eureka Valley/Dolores Heights",
    "analysis_neighborhood": "Castro/Upper Market",
    "property_location_raw": "4251 4249 20TH                ST0000"
  },
  "assessment": {
    "roll_year": 2025,
    "assessed_land_value": 442052,
    "assessed_improvement_value": 707328,
    "last_sale_date": "1992-04-14"
  },
  "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": "1906",
    "in_article_10_11_historic_district": false,
    "source": "sf-planning"
  },
  "permits": [
    {
      "number": "202605292150",
      "type": "otc alterations permit",
      "status": "issued",
      "filed": "2026-05-29",
      "status_date": "2026-06-09",
      "estimated_cost": 20500,
      "revised_cost": 20500,
      "description": "re-roofing - no hot works.",
      "source": "sf-building-permits"
    },
    {
      "number": "M788427",
      "type": "otc alterations permit",
      "status": "issued",
      "filed": "2017-05-22",
      "status_date": "2017-05-22",
      "revised_cost": 0,
      "description": "street space",
      "source": "sf-building-permits"
    },
    {
      "number": "M776627",
      "type": "otc alterations permit",
      "status": "issued",
      "filed": "2017-04-10",
      "status_date": "2017-04-10",
      "revised_cost": 1,
      "description": "street space",
      "source": "sf-building-permits"
    },
    {
      "number": "M769887",
      "type": "otc alterations permit",
      "status": "issued",
      "filed": "2017-03-21",
      "status_date": "2017-03-21",
      "revised_cost": 1,
      "description": "street space",
      "source": "sf-building-permits"
    },
    {
      "number": "M743967",
      "type": "otc alterations permit",
      "status": "issued",
      "filed": "2016-12-06",
      "status_date": "2016-12-06",
      "revised_cost": 1,
      "description": "street space permit",
      "source": "sf-building-permits"
    },
    {
      "number": "201611031816",
      "type": "otc alterations permit",
      "status": "issued",
      "filed": "2016-11-03",
      "status_date": "2016-12-06",
      "estimated_cost": 45000,
      "revised_cost": 45000,
      "description": "replace some original and some replacement windows (15 on front and 15 on street side) with aluminum-clad wood dh windows with ogee lugs, same size, sam location/max u factor 0.32",
      "source": "sf-building-permits"
    },
    {
      "number": "M715767",
      "type": "otc alterations permit",
      "status": "issued",
      "filed": "2016-08-23",
      "status_date": "2016-08-23",
      "revised_cost": 1,
      "description": "street space",
      "source": "sf-building-permits"
    },
    {
      "number": "201608175281",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2016-08-17",
      "status_date": "2017-08-21",
      "estimated_cost": 120000,
      "revised_cost": 120000,
      "description": "revision to pa 2016-0527-8667 - interior layout",
      "source": "sf-building-permits"
    },
    {
      "number": "201605278667",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2016-05-27",
      "status_date": "2017-08-21",
      "estimated_cost": 200000,
      "revised_cost": 250000,
      "description": "in kind fire damage repairs with related code upgrades per plan, all floors.",
      "source": "sf-building-permits"
    },
    {
      "number": "M661067",
      "type": "otc alterations permit",
      "status": "issued",
      "filed": "2016-02-04",
      "status_date": "2016-02-04",
      "revised_cost": 1,
      "description": "street space permit",
      "source": "sf-building-permits"
    },
    {
      "number": "M231427",
      "type": "otc alterations permit",
      "status": "issued",
      "filed": "2010-12-02",
      "status_date": "2010-12-02",
      "revised_cost": 1,
      "description": "street space for scaffold",
      "source": "sf-building-permits"
    },
    {
      "number": "200609283598",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2006-09-28",
      "status_date": "2007-02-20",
      "estimated_cost": 9000,
      "revised_cost": 9000,
      "description": "remove 2 interior walls. bearing walls @ 2nd & 3rd. structural work @ 1st floor garage.",
      "source": "sf-building-permits"
    },
    {
      "number": "9208715",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "1992-05-28",
      "status_date": "1992-06-17",
      "estimated_cost": 8000,
      "description": "repairs per termite inspection report",
      "source": "sf-building-permits"
    },
    {
      "number": "8708988",
      "type": "additions alterations or repairs",
      "status": "complete",
      "filed": "1987-06-29",
      "status_date": "1988-03-03",
      "estimated_cost": 5000,
      "description": "add rear yard parking space, retaining wall, 1 hr protection",
      "source": "sf-building-permits"
    },
    {
      "number": "8702807",
      "type": "additions alterations or repairs",
      "status": "complete",
      "filed": "1987-03-04",
      "status_date": "1987-05-14",
      "estimated_cost": 5000,
      "description": "kitchen renovation,add window,insulation,sheetrock as necess",
      "source": "sf-building-permits"
    },
    {
      "number": "8407481",
      "type": "additions alterations or repairs",
      "status": "complete",
      "filed": "1984-07-12",
      "status_date": "1984-11-09",
      "estimated_cost": 1300,
      "description": "replace/repair wooden steps on one unit",
      "source": "sf-building-permits"
    },
    {
      "number": "8309349",
      "type": "additions alterations or repairs",
      "status": "complete",
      "filed": "1983-09-21",
      "status_date": "1984-02-06",
      "estimated_cost": 1000,
      "source": "sf-building-permits"
    },
    {
      "number": "8306807",
      "type": "additions alterations or repairs",
      "status": "complete",
      "filed": "1983-07-18",
      "status_date": "1984-07-24",
      "estimated_cost": 18000,
      "description": "convert two to floor apartments to single 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=4249",
      "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=2752027&$order=closed_roll_year%20DESC&$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=2752&lot=027",
      "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=2752027",
      "retrieved": "2026-07-28"
    },
    {
      "id": "loc-sf-call-1908-11-13",
      "name": "The San Francisco Call, 13 November 1908, p. 13",
      "query": "https://chroniclingamerica.loc.gov/lccn/sn85066387/1908-11-13/ed-1/seq-13/",
      "retrieved": "2026-10-04"
    }
  ],
  "historical_record": [
    {
      "date": "1908-11-13",
      "kind": "building contract",
      "description": "R. S. K. MacMiller contracted to put up a two-storey frame building, at $5,709.",
      "source": "loc-sf-call-1908-11-13"
    }
  ]
}