{
  "address": "3928 20th Street, San Francisco, CA 94114",
  "path": "/san-francisco/castro/20th-street/3928/",
  "apn": "3600012",
  "block": "3600",
  "lot": "012",
  "eas_baseid": "361692",
  "coordinates": {
    "lat": 37.758289,
    "lng": -122.428794
  },
  "parcel": {
    "year_built": 1903,
    "units": 1,
    "stories": 1,
    "rooms": 8,
    "bathrooms": 3,
    "bedrooms": 4,
    "lot_area_sqft": 2848,
    "building_area_sqft": 3401,
    "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": "Castro/Upper Market",
    "property_location_raw": "0000 3928 20TH                ST0000"
  },
  "assessment": {
    "roll_year": 2025,
    "assessed_land_value": 4356789,
    "assessed_improvement_value": 1919214,
    "last_sale_date": "2021-03-17"
  },
  "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": "1903",
    "in_article_10_11_historic_district": false,
    "source": "sf-planning"
  },
  "permits": [
    {
      "number": "202111243135",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2021-11-24",
      "status_date": "2022-11-03",
      "estimated_cost": 50000,
      "revised_cost": 50000,
      "description": "recessed in-ground hot tub installation with new sump pump, drain and electrical.",
      "source": "sf-building-permits"
    },
    {
      "number": "M581447",
      "type": "otc alterations permit",
      "status": "issued",
      "filed": "2015-04-27",
      "status_date": "2015-04-27",
      "revised_cost": 1,
      "description": "street space",
      "source": "sf-building-permits"
    },
    {
      "number": "201503191283",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2015-03-19",
      "status_date": "2015-11-17",
      "estimated_cost": 2000,
      "revised_cost": 10000,
      "description": "revision to pa# 201302119978s1. revised title 24 to include radiant heat. revised bedroom 3 windows and doors. revised ground level deck.",
      "source": "sf-building-permits"
    },
    {
      "number": "201503191330",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2015-03-19",
      "status_date": "2015-05-12",
      "estimated_cost": 1,
      "revised_cost": 1,
      "description": "as built sprinkler system: delete 2 head, relocate 1 ssp to side wall. ref pa# 2014 0909 5786",
      "source": "sf-building-permits"
    },
    {
      "number": "201409095786",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2014-09-09",
      "status_date": "2015-05-05",
      "estimated_cost": 10000,
      "revised_cost": 25500,
      "description": "install 43 residential sprinkler heads in the 3-story entire building per nfpa 13r and nfpa 13 (garage) with 2-inch comb fire service off of 6-inch main on 20th st.",
      "source": "sf-building-permits"
    },
    {
      "number": "201405054855",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2014-05-05",
      "status_date": "2015-11-17",
      "estimated_cost": 1,
      "revised_cost": 1,
      "description": "revision to 201302119978. retain a portion of existing foundation",
      "source": "sf-building-permits"
    },
    {
      "number": "201302119978",
      "type": "additions alterations or repairs",
      "status": "complete",
      "filed": "2013-02-11",
      "status_date": "2015-07-16",
      "estimated_cost": 485000,
      "revised_cost": 485000,
      "description": "exterior alteration include vertical 3rd flr addition,replacement of (e) 2 story rear yard extension with one-story extension & 2nd flr deck, expansion of (e) light wells & provision of new skylights. interior alterations include remodel of all rooms, provision of new stairs & plumbing & electrical",
      "source": "sf-building-permits"
    },
    {
      "number": "M173445",
      "type": "otc alterations permit",
      "status": "issued",
      "filed": "2009-07-22",
      "status_date": "2009-07-22",
      "revised_cost": 1,
      "description": "street space",
      "source": "sf-building-permits"
    },
    {
      "number": "200906090091",
      "type": "otc alterations permit",
      "status": "expired",
      "filed": "2009-06-09",
      "status_date": "2013-02-04",
      "estimated_cost": 9700,
      "revised_cost": 9700,
      "description": "revision to pa# 2009.05.20.8736 (no plans). replace and repair dry rot at stair balluster walls, and install foundation.",
      "source": "sf-building-permits"
    },
    {
      "number": "200905208736",
      "type": "otc alterations permit",
      "status": "expired",
      "filed": "2009-05-20",
      "status_date": "2013-02-04",
      "estimated_cost": 1890,
      "revised_cost": 1890,
      "description": "repair damage cause by pg & e and dry rot (light pole fell down, damaged. the exterior stair wall, delay repair of the damage & created dry rot).",
      "source": "sf-building-permits"
    },
    {
      "number": "200506013888",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2005-06-01",
      "status_date": "2005-06-29",
      "estimated_cost": 1800,
      "revised_cost": 1800,
      "description": "remove & replace 10'x18'from (e)rear decking.work in kind.non structural work",
      "source": "sf-building-permits"
    },
    {
      "number": "9907506",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "1999-04-19",
      "status_date": "1999-12-15",
      "estimated_cost": 5000,
      "description": "reroofing",
      "source": "sf-building-permits"
    },
    {
      "number": "9802307",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "1998-02-11",
      "status_date": "1998-02-26",
      "estimated_cost": 6000,
      "description": "repair dry rot to deck post, repair stairs,replace rotten de",
      "source": "sf-building-permits"
    },
    {
      "number": "9025940",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "1990-12-21",
      "status_date": "1990-12-27",
      "estimated_cost": 1100,
      "description": "install foundation bolts to perimeter footings.",
      "source": "sf-building-permits"
    },
    {
      "number": "8903629",
      "type": "additions alterations or repairs",
      "status": "complete",
      "filed": "1989-03-07",
      "status_date": "1989-05-22",
      "estimated_cost": 4500,
      "description": "foam insulation sander solid vinyl siding.",
      "source": "sf-building-permits"
    },
    {
      "number": "8811419",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "1988-08-09",
      "status_date": "1988-10-05",
      "estimated_cost": 400,
      "description": "replace the stringers,risen, & threads on backyard stairs.",
      "source": "sf-building-permits"
    },
    {
      "number": "8405908",
      "type": "additions alterations or repairs",
      "status": "complete",
      "filed": "1984-06-05",
      "status_date": "1984-06-21",
      "estimated_cost": 250,
      "description": "reduced height 7'6\" & 7'9\" from rear wall",
      "source": "sf-building-permits"
    },
    {
      "number": "8307572",
      "type": "additions alterations or repairs",
      "status": "complete",
      "filed": "1983-08-04",
      "status_date": "1984-04-16",
      "estimated_cost": 750,
      "description": "legalization of existing structure",
      "source": "sf-building-permits"
    },
    {
      "number": "8204980",
      "type": "additions alterations or repairs",
      "status": "cancelled",
      "filed": "1982-06-18",
      "status_date": "1983-03-31",
      "estimated_cost": 118,
      "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=3928",
      "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=3600012&$order=closed_roll_year%20DESC&$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=012",
      "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=3600012",
      "retrieved": "2026-07-28"
    }
  ]
}