{
  "address": "509 Potrero Avenue, San Francisco, CA 94110",
  "path": "/san-francisco/mission/potrero-avenue/509/",
  "apn": "4013023",
  "block": "4013",
  "lot": "023",
  "eas_baseid": "367316",
  "coordinates": {
    "lat": 37.762771,
    "lng": -122.40692
  },
  "parcel": {
    "year_built": 1911,
    "units": 3,
    "stories": 2,
    "rooms": 15,
    "bathrooms": 4,
    "bedrooms": 6,
    "lot_area_sqft": 2495,
    "building_area_sqft": 4963,
    "use": "Multi-Family Residential",
    "property_class": "2 Dwellings on 1 Parcel 4 units or less",
    "construction_type_code": "D",
    "zoning": "RH-2",
    "supervisor_district": 10,
    "assessor_neighborhood": "Potrero Hill",
    "analysis_neighborhood": "Mission",
    "property_location_raw": "0509B0509 POTRERO             AV0000"
  },
  "assessment": {
    "roll_year": 2025,
    "assessed_land_value": 1741972,
    "assessed_improvement_value": 746559,
    "last_sale_date": "2022-04-29"
  },
  "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": "1911",
    "in_article_10_11_historic_district": false,
    "source": "sf-planning"
  },
  "permits": [
    {
      "number": "M710909",
      "type": "otc alterations permit",
      "status": "issued",
      "filed": "2016-08-04",
      "status_date": "2016-08-04",
      "revised_cost": 0,
      "description": "street space",
      "source": "sf-building-permits"
    },
    {
      "number": "M418287",
      "type": "otc alterations permit",
      "status": "issued",
      "filed": "2013-08-19",
      "status_date": "2013-08-19",
      "revised_cost": 1,
      "description": "street space",
      "source": "sf-building-permits"
    },
    {
      "number": "201307121696",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2013-07-12",
      "status_date": "2014-05-09",
      "estimated_cost": 40000,
      "revised_cost": 108000,
      "description": "interior remodel of 1/f & basement of rear cottage. remove existing exterior access stair and replace with new interior access stair. new foundation and retaining wall. add bedroom and full bath at ground fl. demo all interior finishes, new plumbing & electric.",
      "source": "sf-building-permits"
    },
    {
      "number": "201301047227",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2013-01-04",
      "status_date": "2013-01-11",
      "estimated_cost": 14000,
      "revised_cost": 14000,
      "description": "reroofing",
      "source": "sf-building-permits"
    },
    {
      "number": "201206213136",
      "type": "additions alterations or repairs",
      "status": "complete",
      "filed": "2012-06-21",
      "status_date": "2012-08-09",
      "estimated_cost": 7500,
      "revised_cost": 7500,
      "description": "replacement in kind exterior stairway & deck, not completed with the benefit of a permit. though it was apparently repaired (partially) & rebuilt completely along with other work. that was completed under permit app#200909026362.",
      "source": "sf-building-permits"
    },
    {
      "number": "201206213142",
      "type": "additions alterations or repairs",
      "status": "complete",
      "filed": "2012-06-21",
      "status_date": "2012-08-09",
      "estimated_cost": 8000,
      "revised_cost": 8000,
      "description": "to correct & amend current 3r report, in order to show changefrom being listed as \"unknown\" to the present & authorized occupancy & use as a single family dwelling. to legalize the replacement in kind exterior stairway not completed with the benefit of a permit. though it was apparently built",
      "source": "sf-building-permits"
    },
    {
      "number": "201206213179",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2012-06-21",
      "status_date": "2012-06-27",
      "estimated_cost": 1,
      "revised_cost": 1,
      "description": "to obtain final inspection for work approved under pa 200407098385; all work is complete",
      "source": "sf-building-permits"
    },
    {
      "number": "M329067",
      "type": "otc alterations permit",
      "status": "issued",
      "filed": "2012-06-20",
      "status_date": "2012-06-20",
      "revised_cost": 267,
      "description": "front bldg; address change from 509-1/2 to 509a potrero ave. rear bldg; address change from 509a to 509b potrero ave.",
      "source": "sf-building-permits"
    },
    {
      "number": "M185786",
      "type": "otc alterations permit",
      "status": "issued",
      "filed": "2009-12-08",
      "status_date": "2009-12-08",
      "revised_cost": 1,
      "description": "street space permit",
      "source": "sf-building-permits"
    },
    {
      "number": "200911231920",
      "type": "otc alterations permit",
      "status": "withdrawn",
      "filed": "2009-11-23",
      "status_date": "2010-01-29",
      "estimated_cost": 10500,
      "revised_cost": 10500,
      "description": "reroofing.",
      "source": "sf-building-permits"
    },
    {
      "number": "200909086362",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2009-09-08",
      "status_date": "2011-08-10",
      "estimated_cost": 200000,
      "revised_cost": 200000,
      "description": "fire damage repair.replace 5' of rear wall, 6' of right side wall & 8 ft of rear bedrm inside wall 2ndfl to roof. replace 12' x 14' rear bedrm roof. replace 2 front & 4 rr wdws. replace kitch & bathrm on 2nd and 3rd fl.install insulation,replace gyp bd wall& clgs.replair elec & mech. front bldg only",
      "source": "sf-building-permits"
    },
    {
      "number": "200407098385",
      "type": "otc alterations permit",
      "status": "issued",
      "filed": "2004-07-09",
      "status_date": "2004-07-09",
      "estimated_cost": 15835,
      "revised_cost": 15835,
      "description": "replace 38 windows in kind from aluminum to white vinyl, 4 visible from street, no structural change",
      "source": "sf-building-permits"
    },
    {
      "number": "200111273987",
      "type": "otc alterations permit",
      "status": "expired",
      "filed": "2001-11-27",
      "status_date": "2002-03-27",
      "estimated_cost": 1000,
      "revised_cost": 1000,
      "description": "electrical wiring main line connection/hookup to new panel/ground wire connection",
      "source": "sf-building-permits"
    },
    {
      "number": "9400982",
      "type": "otc alterations permit",
      "status": "expired",
      "filed": "1994-01-20",
      "status_date": "1994-07-20",
      "estimated_cost": 5850,
      "description": "reroofing.",
      "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=POTRERO&street_type=AVE&address_number=509",
      "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=4013023&$order=closed_roll_year%20DESC&$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=4013&lot=023",
      "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=4013023",
      "retrieved": "2026-07-31"
    }
  ]
}