{
  "address": "3731 20th Street, San Francisco, CA 94110",
  "path": "/san-francisco/mission/20th-street/3731/",
  "apn": "3607070A",
  "block": "3607",
  "lot": "070A",
  "eas_baseid": "362290",
  "coordinates": {
    "lat": 37.758079,
    "lng": -122.424183
  },
  "parcel": {
    "year_built": 1900,
    "units": 1,
    "stories": 2,
    "rooms": 6,
    "bathrooms": 2,
    "bedrooms": 2,
    "lot_area_sqft": 2850,
    "building_area_sqft": 2226,
    "lot_depth_ft": 14,
    "use": "Single Family Residential",
    "property_class": "Dwelling",
    "construction_type_code": "D",
    "zoning": "RH-2",
    "supervisor_district": 8,
    "assessor_neighborhood": "Eureka Valley/Dolores Heights",
    "analysis_neighborhood": "Mission",
    "property_location_raw": "0000 3731 20TH                ST0000"
  },
  "assessment": {
    "roll_year": 2025,
    "assessed_land_value": 1478325,
    "assessed_improvement_value": 695073,
    "last_sale_date": "2012-07-13"
  },
  "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",
    "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": "202008262669",
      "type": "otc alterations permit",
      "status": "withdrawn",
      "filed": "2020-08-26",
      "status_date": "2020-10-29",
      "description": "install gate at front - shared gate - replace existing gates. ref p.a 201910285721",
      "source": "sf-building-permits"
    },
    {
      "number": "M1220147",
      "type": "otc alterations permit",
      "status": "filed",
      "filed": "2020-08-06",
      "status_date": "2020-08-06",
      "revised_cost": 0,
      "description": "street space",
      "source": "sf-building-permits"
    },
    {
      "number": "M679807",
      "type": "otc alterations permit",
      "status": "issued",
      "filed": "2016-04-07",
      "status_date": "2016-04-07",
      "revised_cost": 1,
      "description": "street space permit (201511243517) renewal of permit e 201511243517",
      "source": "sf-building-permits"
    },
    {
      "number": "201511243517",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2015-11-24",
      "status_date": "2016-11-21",
      "estimated_cost": 50000,
      "revised_cost": 50000,
      "description": "remodel kitchen & bathroom on 1st floor of (e) s.f. r. work to include (n) fixtures & finishes. also replace (e) ceiling light @ hallway.",
      "source": "sf-building-permits"
    },
    {
      "number": "201511243536",
      "type": "additions alterations or repairs",
      "status": "complete",
      "filed": "2015-11-24",
      "status_date": "2016-11-21",
      "estimated_cost": 9500,
      "revised_cost": 9500,
      "description": "replacement of existing door @ dining room, relocation of existing door at kitchen as well as replacement & relocation of window @ kitchen.",
      "source": "sf-building-permits"
    },
    {
      "number": "201303152282",
      "type": "additions alterations or repairs",
      "status": "complete",
      "filed": "2013-03-15",
      "status_date": "2013-07-08",
      "estimated_cost": 4000,
      "revised_cost": 6000,
      "description": "new skylight with(flat glass) & replacement of 4 existing windows at rear of building.",
      "source": "sf-building-permits"
    },
    {
      "number": "201303132093",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2013-03-13",
      "status_date": "2013-06-28",
      "estimated_cost": 15000,
      "revised_cost": 15000,
      "description": "bathroom renovation including (n) fixtures, finishes. no work on the first floor.",
      "source": "sf-building-permits"
    },
    {
      "number": "200201247662",
      "type": "additions alterations or repairs",
      "status": "complete",
      "filed": "2002-01-24",
      "status_date": "2003-06-27",
      "estimated_cost": 150000,
      "revised_cost": 150000,
      "description": "add 2 car garage in (e) ground floor, w/curb cut for driveway no morn than 10' wide",
      "source": "sf-building-permits"
    },
    {
      "number": "9301548",
      "type": "additions alterations or repairs",
      "status": "complete",
      "filed": "1993-02-01",
      "status_date": "1994-10-14",
      "estimated_cost": 120000,
      "description": "vertical addition",
      "source": "sf-building-permits"
    },
    {
      "number": "8810875",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "1988-08-04",
      "status_date": "1988-09-20",
      "estimated_cost": 1094,
      "description": "install 2 aluminum windows in existing frames",
      "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=3731",
      "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=3607070A&$order=closed_roll_year%20DESC&$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=3607&lot=070A",
      "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=3607070A",
      "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(-122.42418253417112%2037.75807869542367)%27)",
      "retrieved": "2026-07-31"
    }
  ]
}