{
  "address": "3441–3447 20th Street, San Francisco, CA 94110",
  "path": "/san-francisco/mission/20th-street/3441/",
  "apn": "3610047",
  "block": "3610",
  "lot": "047",
  "eas_baseid": "275031",
  "coordinates": {
    "lat": 37.758609,
    "lng": -122.417748
  },
  "address_range": "3441–3447",
  "street_numbers_on_parcel": [
    "3441",
    "3443",
    "3445",
    "3447"
  ],
  "also_addressed": [
    "501 CAPP ST",
    "503 CAPP ST"
  ],
  "parcel": {
    "year_built": 1900,
    "units": 9,
    "stories": 3,
    "rooms": 35,
    "bathrooms": 9,
    "lot_area_sqft": 6018,
    "building_area_sqft": 11450,
    "lot_depth_ft": 60.18,
    "use": "Multi-Family Residential",
    "property_class": "TI Apartment",
    "construction_type_code": "D",
    "zoning": "RM-1",
    "supervisor_district": 9,
    "assessor_neighborhood": "Inner Mission",
    "analysis_neighborhood": "Mission",
    "property_location_raw": "3447 3441 20TH                ST0000"
  },
  "assessment": {
    "roll_year": 2025,
    "assessed_land_value": 2808901,
    "assessed_improvement_value": 3846616,
    "last_sale_date": "2008-04-16"
  },
  "historic_status": {
    "ceqa_status_code": "A",
    "ceqa_status_code_article_10_11": "A",
    "ceqa_status_label": "Historic resource",
    "reason": "Historic Resource Evaluation Response, Historic Survey Result",
    "yearbuilt": "1900",
    "in_article_10_11_historic_district": false,
    "source": "sf-planning"
  },
  "permits": [
    {
      "number": "202308315697",
      "type": "otc alterations permit",
      "status": "issued",
      "filed": "2023-08-31",
      "status_date": "2023-09-12",
      "estimated_cost": 1,
      "revised_cost": 1,
      "description": "as built f/s plan of ref permit 202112144409. adding copper pipe and propress fittings as an underground option.",
      "source": "sf-building-permits"
    },
    {
      "number": "202204132106",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2022-04-13",
      "status_date": "2023-10-30",
      "estimated_cost": 30000,
      "revised_cost": 30000,
      "description": "upgrade (e) fire alarm system to comply with sffc section 1103.7.6.1.",
      "source": "sf-building-permits"
    },
    {
      "number": "202112144409",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2021-12-14",
      "status_date": "2023-11-03",
      "estimated_cost": 58000,
      "revised_cost": 77700,
      "description": "installation of fire sprinkler system. ref permit no. 2015.0109.5338 s-1",
      "source": "sf-building-permits"
    },
    {
      "number": "202111011523",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2021-11-01",
      "status_date": "2022-12-15",
      "estimated_cost": 54800,
      "revised_cost": 54800,
      "description": "reroofing",
      "source": "sf-building-permits"
    },
    {
      "number": "201802080803",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2018-02-08",
      "status_date": "2023-12-20",
      "estimated_cost": 6000,
      "revised_cost": 6000,
      "description": "exploratory soft demo to expose framing and footings in basement floor for engineering of pa 2015-0109-5338",
      "source": "sf-building-permits"
    },
    {
      "number": "201501095338",
      "type": "additions alterations or repairs",
      "status": "complete",
      "filed": "2015-01-09",
      "status_date": "2023-12-20",
      "estimated_cost": 250000,
      "revised_cost": 934523,
      "description": "add 3rd floor (2 apts), remodel basement apts and add 1 apt & 3 parking spaces. (total additions 3 apts.) remodel existing rear stair & add roof deck. sprinkler/alarm deferred.",
      "source": "sf-building-permits"
    },
    {
      "number": "201501095410",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2015-01-09",
      "status_date": "2015-06-24",
      "estimated_cost": 7800,
      "revised_cost": 7800,
      "description": "reroofing.",
      "source": "sf-building-permits"
    },
    {
      "number": "201412043072",
      "type": "otc alterations permit",
      "status": "expired",
      "filed": "2014-12-04",
      "status_date": "2023-12-20",
      "estimated_cost": 28000,
      "revised_cost": 28000,
      "description": "remodel kitchen and 1 bathroom in upper unit of duplex. replace cabinets countertops, appliances and retile. replace toilet, sink and tub in bathroom retile. no alteration of window, wall and door.",
      "source": "sf-building-permits"
    },
    {
      "number": "201008038047",
      "type": "otc alterations permit",
      "status": "expired",
      "filed": "2010-08-03",
      "status_date": "2023-12-20",
      "estimated_cost": 41873,
      "revised_cost": 41873,
      "description": "1/f- remodel kitchen and 2 bathrooms, replace cabinets in kind, replace sink and appliances, replace bathtub and 2 sinks to comply with 201032761 dated 2/5/10. 70' kitchen, replace 6 lights, 40 sf. bath 1 & 50 sf bath 2.",
      "source": "sf-building-permits"
    },
    {
      "number": "M185687",
      "type": "otc alterations permit",
      "status": "issued",
      "filed": "2009-12-07",
      "status_date": "2009-12-07",
      "revised_cost": 1,
      "description": "street space and sidewalk repair",
      "source": "sf-building-permits"
    },
    {
      "number": "M59265",
      "type": "otc alterations permit",
      "status": "issued",
      "filed": "2007-03-01",
      "status_date": "2007-03-01",
      "revised_cost": 0,
      "description": "street space & sidewalk permit only.",
      "source": "sf-building-permits"
    },
    {
      "number": "200601051512",
      "type": "otc alterations permit",
      "status": "expired",
      "filed": "2006-01-05",
      "status_date": "2009-01-28",
      "estimated_cost": 4500,
      "revised_cost": 4500,
      "description": "add fire sprinkler to cover trash area and entryway - new meter ground level",
      "source": "sf-building-permits"
    },
    {
      "number": "200301286102",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2003-01-28",
      "status_date": "2003-02-05",
      "estimated_cost": 1,
      "revised_cost": 1,
      "description": "renew pa #200112044496 & #200108297097",
      "source": "sf-building-permits"
    },
    {
      "number": "200209045618",
      "type": "otc alterations permit",
      "status": "expired",
      "filed": "2002-09-04",
      "status_date": "2003-09-15",
      "estimated_cost": 500,
      "revised_cost": 500,
      "description": "ref. appl#200112044496, 200207171610 to remove kitchen & bathroom in basement",
      "source": "sf-building-permits"
    },
    {
      "number": "200207171610",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2002-07-17",
      "status_date": "2003-02-05",
      "estimated_cost": 1,
      "revised_cost": 1,
      "description": "to comply with notice of violation per app #200112044496",
      "source": "sf-building-permits"
    },
    {
      "number": "200112044496",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2001-12-04",
      "status_date": "2003-02-05",
      "estimated_cost": 60000,
      "revised_cost": 60000,
      "description": "repair/replace in kind upper roof 22x45, laundry roof 2 x 19, laundry roof/flrs 9x22, egress stair",
      "source": "sf-building-permits"
    },
    {
      "number": "200108297097",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2001-08-29",
      "status_date": "2003-02-05",
      "estimated_cost": 170000,
      "revised_cost": 170000,
      "description": "fire repair drywall replacement kitchen-bath fixts.structural roof & staircase repair under separate",
      "source": "sf-building-permits"
    },
    {
      "number": "9000275",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "1990-01-04",
      "status_date": "1990-01-30",
      "estimated_cost": 8000,
      "description": "reroof",
      "source": "sf-building-permits"
    },
    {
      "number": "8702123",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "1987-02-18",
      "status_date": "1987-05-29",
      "estimated_cost": 700,
      "revised_cost": 0,
      "description": "remove brick chimney, sheetrock, abandon living rm & kitchen",
      "source": "sf-building-permits"
    },
    {
      "number": "8500626",
      "type": "additions alterations or repairs",
      "status": "complete",
      "filed": "1985-01-22",
      "status_date": "1986-07-17",
      "estimated_cost": 1500,
      "description": "to bring up to code",
      "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=3441",
      "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=3610047&$order=closed_roll_year%20DESC&$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=3610&lot=047",
      "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=3610047",
      "retrieved": "2026-07-31"
    }
  ]
}