{
  "address": "3643 20th Street, San Francisco, CA 94110",
  "path": "/san-francisco/mission/20th-street/3643/",
  "apn": "3608067",
  "block": "3608",
  "lot": "067",
  "eas_baseid": "362347",
  "coordinates": {
    "lat": 37.758197,
    "lng": -122.422245
  },
  "parcel": {
    "year_built": 1900,
    "units": 1,
    "stories": 2,
    "rooms": 11,
    "bathrooms": 3,
    "bedrooms": 3,
    "lot_area_sqft": 2874,
    "building_area_sqft": 1250,
    "basement_area_sqft": 1190,
    "use": "Single Family Residential",
    "property_class": "Dwelling",
    "construction_type_code": "D",
    "zoning": "RH-3",
    "supervisor_district": 9,
    "assessor_neighborhood": "Eureka Valley/Dolores Heights",
    "analysis_neighborhood": "Mission",
    "property_location_raw": "0000 3643 20TH                ST0000"
  },
  "assessment": {
    "roll_year": 2025,
    "assessed_land_value": 1513310,
    "assessed_improvement_value": 1308842,
    "last_sale_date": "2017-11-27"
  },
  "historic_status": {
    "ceqa_status_code": "A",
    "ceqa_status_code_article_10_11": "A*",
    "ceqa_status_label": "Historic resource",
    "reason": "Article 10 Historic District, California Register Historic District, Historic Survey Result",
    "yearbuilt": "1900",
    "in_article_10_11_historic_district": true,
    "source": "sf-planning"
  },
  "historic_district": {
    "name": "Liberty Hill Historic District",
    "california_register_status": "Eligible (not listed)",
    "national_register_status": "Not listed",
    "article_10_11_status": "Article 10 historic district",
    "local_landmark_protection": true,
    "period_of_significance": "1860s–1906",
    "source": "sf-historic-districts"
  },
  "permits": [
    {
      "number": "202511179790",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2025-11-17",
      "status_date": "2025-12-08",
      "estimated_cost": 25000,
      "revised_cost": 25000,
      "description": "reroof. no hotworks or torch down.",
      "source": "sf-building-permits"
    },
    {
      "number": "202202017078",
      "type": "otc alterations permit",
      "status": "cancelled",
      "filed": "2022-02-01",
      "status_date": "2026-01-23",
      "estimated_cost": 60000,
      "revised_cost": 0,
      "description": "modify entrance stairs, roof deck at front, expand garage storage",
      "source": "sf-building-permits"
    },
    {
      "number": "M1137107",
      "type": "otc alterations permit",
      "status": "issued",
      "filed": "2019-09-11",
      "status_date": "2019-09-11",
      "revised_cost": 1,
      "description": "street space",
      "source": "sf-building-permits"
    },
    {
      "number": "201907297259",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2019-07-29",
      "status_date": "2021-05-26",
      "estimated_cost": 1,
      "revised_cost": 1,
      "description": "administrative permit to pay penalty fees on nov#201969421 that were not assessed on pa#201903014147 - 2 x $20,000 per sfbc106a.4",
      "source": "sf-building-permits"
    },
    {
      "number": "201907014834",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2019-07-01",
      "status_date": "2021-05-21",
      "estimated_cost": 1,
      "revised_cost": 1,
      "description": "revision to app#201803163818 including revision to main floor bathroom and closet layout and addition of construction details.",
      "source": "sf-building-permits"
    },
    {
      "number": "M1050507",
      "type": "otc alterations permit",
      "status": "issued",
      "filed": "2019-03-12",
      "status_date": "2019-03-12",
      "revised_cost": 0,
      "description": "street space",
      "source": "sf-building-permits"
    },
    {
      "number": "201903014147",
      "type": "additions alterations or repairs",
      "status": "complete",
      "filed": "2019-03-01",
      "status_date": "2021-05-21",
      "estimated_cost": 45000,
      "revised_cost": 45000,
      "description": "addition of living space to extg 9'-3\" tall basement within bldg envelope. addition shall include new bedroom, 2 bathrooms, entertainment room and den. new stairs from main floor to basement.",
      "source": "sf-building-permits"
    },
    {
      "number": "M977327",
      "type": "otc alterations permit",
      "status": "issued",
      "filed": "2018-09-11",
      "status_date": "2018-12-18",
      "revised_cost": 1,
      "description": "street space",
      "source": "sf-building-permits"
    },
    {
      "number": "201808278447",
      "type": "additions alterations or repairs",
      "status": "complete",
      "filed": "2018-08-27",
      "status_date": "2021-05-21",
      "estimated_cost": 40000,
      "revised_cost": 40000,
      "description": "remove existing wood windows and door at rear and replace with new aluminum-clad wood windows and door; change in window area not to exceed 81 square feet total. infill with wood siding in-kind as necessary. excavation for new stair and patio.",
      "source": "sf-building-permits"
    },
    {
      "number": "201806040919",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2018-06-04",
      "status_date": "2021-05-21",
      "estimated_cost": 1,
      "revised_cost": 1,
      "description": "rev to pa# 201712217172; revised details for south wall foundation",
      "source": "sf-building-permits"
    },
    {
      "number": "201805219650",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2018-05-21",
      "status_date": "2021-05-21",
      "estimated_cost": 1,
      "revised_cost": 1,
      "description": "revision to pa# 201712217172 revised detail at west property line foundation",
      "source": "sf-building-permits"
    },
    {
      "number": "201803163818",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2018-03-16",
      "status_date": "2021-05-21",
      "estimated_cost": 40000,
      "revised_cost": 195000,
      "description": "interior remodel including remodel of (e) bedrooms & kitchen remodel. addition of new loft space within building envelope",
      "source": "sf-building-permits"
    },
    {
      "number": "M898807",
      "type": "otc alterations permit",
      "status": "issued",
      "filed": "2018-03-12",
      "status_date": "2018-03-12",
      "revised_cost": 1,
      "description": "street space",
      "source": "sf-building-permits"
    },
    {
      "number": "201712217172",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2017-12-21",
      "status_date": "2021-05-21",
      "estimated_cost": 50000,
      "revised_cost": 50000,
      "description": "foundation replacement & (n) slab on grade in crawl space. voluntary seismic upgrades.",
      "source": "sf-building-permits"
    },
    {
      "number": "9002304",
      "type": "additions alterations or repairs",
      "status": "complete",
      "filed": "1990-02-06",
      "status_date": "1990-07-13",
      "estimated_cost": 10000,
      "description": "foundation restoration",
      "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=3643",
      "retrieved": "2026-07-31"
    },
    {
      "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=3608067&$order=closed_roll_year%20DESC&$limit=1",
      "retrieved": "2026-07-31"
    },
    {
      "id": "sf-building-permits",
      "name": "SF Dept. of Building Inspection via DataSF",
      "query": "https://data.sfgov.org/resource/i98e-djp9.json?block=3608&lot=067",
      "retrieved": "2026-07-31"
    },
    {
      "id": "sf-planning",
      "name": "SF Planning Department — Historic Resource Status by Parcel via DataSF",
      "query": "https://data.sfgov.org/resource/3tsw-4idn.json?apn=3608067",
      "retrieved": "2026-07-31"
    },
    {
      "id": "sf-historic-districts",
      "name": "SF Planning Department — Historic Districts via DataSF",
      "query": "https://data.sfgov.org/resource/63x5-g3m4.json?$where=intersects(the_geom,%20%27POINT(-122.4222445286641%2037.758197199566105)%27)",
      "retrieved": "2026-07-31"
    }
  ]
}