{
  "address": "3763 20th Street, San Francisco, CA 94110",
  "path": "/san-francisco/mission/20th-street/3763/",
  "apn": "3607064",
  "block": "3607",
  "lot": "064",
  "eas_baseid": "362284",
  "coordinates": {
    "lat": 37.758042,
    "lng": -122.424786
  },
  "parcel": {
    "year_built": 1900,
    "units": 1,
    "stories": 1,
    "rooms": 6,
    "bathrooms": 1,
    "lot_area_sqft": 2848,
    "building_area_sqft": 1520,
    "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 3763 20TH                ST0000"
  },
  "assessment": {
    "roll_year": 2025,
    "assessed_land_value": 133210,
    "assessed_improvement_value": 97685
  },
  "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": "202603258271",
      "type": "otc alterations permit",
      "status": "issued",
      "filed": "2026-03-25",
      "status_date": "2026-03-25",
      "estimated_cost": 12500,
      "revised_cost": 46337,
      "description": "install walk-in closet and bathroom with 1-toilet, 2-sinks and 1-shower in current office space, 1st flr 135 sqft adjust pantry/closet configuration to support toilet installation. replace & relocate hot water heat with heat pump electric hot water heater from 1st flr to basement.",
      "source": "sf-building-permits"
    },
    {
      "number": "201502027237",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2015-02-02",
      "status_date": "2015-03-20",
      "estimated_cost": 32380,
      "revised_cost": 32380,
      "description": "reroofing",
      "source": "sf-building-permits"
    },
    {
      "number": "M13273",
      "type": "otc alterations permit",
      "status": "expired",
      "filed": "2000-06-30",
      "status_date": "2001-06-30",
      "revised_cost": 40000,
      "description": "street space use",
      "source": "sf-building-permits"
    },
    {
      "number": "M11573",
      "type": "otc alterations permit",
      "status": "expired",
      "filed": "2000-02-14",
      "status_date": "2000-06-14",
      "revised_cost": 0,
      "description": "street space use",
      "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=3763",
      "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=3607064&$order=closed_roll_year%20DESC&$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=064",
      "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=3607064",
      "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(-122.424786140434%2037.75804220880415)%27)",
      "retrieved": "2026-07-31"
    },
    {
      "id": "architecture-preservation-professionals-biographies",
      "name": "San Francisco Planning Department, Architecture, Planning, & Preservation Professionals: A Collection of Biographies (volume V–Z), citywide historic context statement, adopted November 17, 2021, updated December 30, 2025",
      "query": "https://citypln-m-extnl.sfgov.org/SharedLinks.aspx?accesskey=2c8863b8cbd143e02858494de6865a67321b2a33effe8b9c9dac8ccf3193d4a3&VaultGUID=A4A7DACD-B0DC-4322-BD29-F6F07103C6E0",
      "listing": "https://sfplanning.org/project/sf-histories-historic-context-statements#completed",
      "label": "Architecture, Planning & Preservation Professionals: A Collection of Biographies, adopted 2021",
      "retrieved": "2026-09-02"
    }
  ],
  "historical_record": [
    {
      "date": "1900",
      "kind": "construction",
      "description": "Designed by architect Michael J. Welsh.",
      "source": "architecture-preservation-professionals-biographies"
    }
  ],
  "building": {
    "architect": "Michael J. Welsh"
  }
}