{
  "address": "3956 20th Street, San Francisco, CA 94114",
  "path": "/san-francisco/castro/20th-street/3956/",
  "apn": "3600017",
  "block": "3600",
  "lot": "017",
  "eas_baseid": "361697",
  "coordinates": {
    "lat": 37.758263,
    "lng": -122.429225
  },
  "parcel": {
    "year_built": 1916,
    "units": 1,
    "stories": 2,
    "rooms": 7,
    "bathrooms": 2,
    "bedrooms": 3,
    "lot_area_sqft": 2848,
    "building_area_sqft": 1642,
    "use": "Single Family Residential",
    "property_class": "Dwelling",
    "construction_type_code": "D",
    "zoning": "RH-1",
    "supervisor_district": 8,
    "assessor_neighborhood": "Eureka Valley/Dolores Heights",
    "analysis_neighborhood": "Castro/Upper Market",
    "property_location_raw": "0000 3956 20TH                ST0000"
  },
  "assessment": {
    "roll_year": 2025,
    "assessed_land_value": 2100000,
    "assessed_improvement_value": 900000,
    "last_sale_date": "2018-10-29"
  },
  "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": "1916",
    "in_article_10_11_historic_district": false,
    "source": "sf-planning"
  },
  "permits": [
    {
      "number": "201111018032",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2011-11-01",
      "status_date": "2012-02-01",
      "estimated_cost": 3000,
      "revised_cost": 16000,
      "description": "remove (e) rear deck & add new rear deck & stair to residence, add new wall & door to enclose exisitng storage behind.",
      "source": "sf-building-permits"
    },
    {
      "number": "201012106479",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2010-12-10",
      "status_date": "2011-04-07",
      "estimated_cost": 1,
      "revised_cost": 1,
      "description": "revision to #2010 1101 4137; change 'simpson' moment frame to (2) hss 6x4x1/4 structural steel tubes (cantilever)",
      "source": "sf-building-permits"
    },
    {
      "number": "201011225387",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2010-11-22",
      "status_date": "2010-12-03",
      "estimated_cost": 12000,
      "revised_cost": 12000,
      "description": "reroofing",
      "source": "sf-building-permits"
    },
    {
      "number": "201011014137",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2010-11-01",
      "status_date": "2011-04-07",
      "estimated_cost": 5000,
      "revised_cost": 15000,
      "description": "add bay window to (e) app#201010183231",
      "source": "sf-building-permits"
    },
    {
      "number": "201010183231",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2010-10-18",
      "status_date": "2011-04-07",
      "estimated_cost": 5000,
      "revised_cost": 30000,
      "description": "kitchen remodel. add new full bath on 2nd fl. powder room at 1st fl. removal of bookcases and wall covering in front upstairs bedroom. 2 skylights",
      "source": "sf-building-permits"
    },
    {
      "number": "201003309276",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2010-03-30",
      "status_date": "2010-05-19",
      "estimated_cost": 8000,
      "revised_cost": 8000,
      "description": "repair footing & wall damage due to car crashing into corner of wall, see attached engineering report from dated 3-29-10",
      "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=3956",
      "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=3600017&$order=closed_roll_year%20DESC&$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=3600&lot=017",
      "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=3600017",
      "retrieved": "2026-07-28"
    }
  ]
}