{
  "address": "3507–3509 23rd Street, San Francisco, CA 94110",
  "path": "/san-francisco/mission/23rd-street/3507/",
  "apn": "3646028",
  "block": "3646",
  "lot": "028",
  "eas_baseid": "364256",
  "coordinates": {
    "lat": 37.753441,
    "lng": -122.421765
  },
  "address_range": "3507–3509",
  "street_numbers_on_parcel": [
    "3507",
    "3509"
  ],
  "parcel": {
    "year_built": 1900,
    "units": 3,
    "stories": 2,
    "rooms": 15,
    "bathrooms": 8,
    "lot_area_sqft": 2125,
    "building_area_sqft": 2880,
    "lot_depth_ft": 85,
    "use": "Multi-Family Residential",
    "property_class": "Flats & Duplex",
    "construction_type_code": "D",
    "zoning": "RH-3",
    "supervisor_district": 9,
    "assessor_neighborhood": "Noe Valley",
    "analysis_neighborhood": "Mission",
    "property_location_raw": "3509 3507 23RD                ST0000"
  },
  "assessment": {
    "roll_year": 2025,
    "assessed_land_value": 1587482,
    "assessed_improvement_value": 1299464,
    "last_sale_date": "2014-05-23"
  },
  "historic_status": {
    "ceqa_status_code": "A",
    "ceqa_status_code_article_10_11": "A",
    "ceqa_status_label": "Historic resource",
    "reason": "National Register Historic District, California Register Historic District, Historic Survey Result",
    "yearbuilt": "1900",
    "in_article_10_11_historic_district": false,
    "source": "sf-planning"
  },
  "historic_district": {
    "name": "Horner's Addition East Historic District",
    "california_register_status": "Eligible (not listed)",
    "national_register_status": "Eligible (not listed)",
    "article_10_11_status": "No local landmark protection",
    "local_landmark_protection": false,
    "period_of_significance": "1865–1905",
    "source": "sf-historic-districts"
  },
  "permits": [
    {
      "number": "M608087",
      "type": "otc alterations permit",
      "status": "issued",
      "filed": "2015-07-28",
      "status_date": "2015-07-28",
      "revised_cost": 1,
      "description": "street space",
      "source": "sf-building-permits"
    },
    {
      "number": "201505015139",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2015-05-01",
      "status_date": "2015-09-29",
      "estimated_cost": 5800,
      "revised_cost": 5800,
      "description": "install new fire alarm system w/ifp-50 control unit. heat det. above & pull station near pamel. tie-in waterflow & tamper switches to new panel. ref pa 2014 1218 4002",
      "source": "sf-building-permits"
    },
    {
      "number": "201504022611",
      "type": "additions alterations or repairs",
      "status": "complete",
      "filed": "2015-04-02",
      "status_date": "2015-09-29",
      "estimated_cost": 38550,
      "revised_cost": 40000,
      "description": "install new fire sprinkler system throughout building including new 2-inch underground fire service. total sprinklers 75. ref pa# 2014/12/18/4002.",
      "source": "sf-building-permits"
    },
    {
      "number": "M555647",
      "type": "otc alterations permit",
      "status": "issued",
      "filed": "2015-02-02",
      "status_date": "2015-02-02",
      "revised_cost": 1,
      "description": "street space",
      "source": "sf-building-permits"
    },
    {
      "number": "201412184002",
      "type": "additions alterations or repairs",
      "status": "complete",
      "filed": "2014-12-18",
      "status_date": "2015-09-30",
      "estimated_cost": 495000,
      "revised_cost": 495000,
      "description": "remodel 3 kitchens (2 relocated) remodel 4 baths (3 relocated) remodel 1/2 bath (relocated); add 1/2 bath, add 2 baths. add 2 bedrms & 2 baths in 3rd story. expand one unit into storage area. relocate interior stairs within top one unit,remove fire escape ladder,remove rear stairs,add 4 skylights.",
      "source": "sf-building-permits"
    },
    {
      "number": "201412173982",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2014-12-17",
      "status_date": "2015-02-12",
      "estimated_cost": 16400,
      "revised_cost": 16400,
      "description": "reroofing",
      "source": "sf-building-permits"
    },
    {
      "number": "201411131386",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2014-11-13",
      "status_date": "2015-09-30",
      "estimated_cost": 60000,
      "revised_cost": 60000,
      "description": "(4) new dormers @ roof/attic level (to comply w/z.a. bulletin #3), fire sprinklers under separate permit.",
      "source": "sf-building-permits"
    },
    {
      "number": "201408264750",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2014-08-26",
      "status_date": "2015-09-30",
      "estimated_cost": 25000,
      "revised_cost": 25000,
      "description": "revision to appl #2014.0721.1726 - foundation replacement",
      "source": "sf-building-permits"
    },
    {
      "number": "M507187",
      "type": "otc alterations permit",
      "status": "issued",
      "filed": "2014-07-28",
      "status_date": "2014-07-28",
      "revised_cost": 1,
      "description": "street space",
      "source": "sf-building-permits"
    },
    {
      "number": "201407211726",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2014-07-21",
      "status_date": "2015-09-30",
      "estimated_cost": 35000,
      "revised_cost": 50000,
      "description": "replace portions of extg foundation in basement per plan.",
      "source": "sf-building-permits"
    },
    {
      "number": "M473707",
      "type": "otc alterations permit",
      "status": "issued",
      "filed": "2014-03-24",
      "status_date": "2014-03-24",
      "revised_cost": 1,
      "description": "street space permit",
      "source": "sf-building-permits"
    },
    {
      "number": "M438967",
      "type": "otc alterations permit",
      "status": "issued",
      "filed": "2013-10-28",
      "status_date": "2013-10-28",
      "revised_cost": 1,
      "description": "street space permit",
      "source": "sf-building-permits"
    },
    {
      "number": "201204057697",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2012-04-05",
      "status_date": "2012-08-06",
      "estimated_cost": 1500,
      "revised_cost": 1500,
      "description": "dry rot repair, replace in kind, existng treads risers, and plywood on rear yard staircase. less than 50% replacement.",
      "source": "sf-building-permits"
    },
    {
      "number": "201202103960",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2012-02-10",
      "status_date": "2012-08-06",
      "estimated_cost": 12000,
      "revised_cost": 12000,
      "description": "window replacement, 8 total, windows do not face the street, side and rear elevation, no change in rough openings, aluminum existing, vinyl prosposed, u-value =0.30",
      "source": "sf-building-permits"
    },
    {
      "number": "200605312892",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2006-05-31",
      "status_date": "2006-08-09",
      "estimated_cost": 18000,
      "revised_cost": 18000,
      "description": "interior changes, no exterior changes, bathroom new tile floor, new bathroom vanity & sink, new tub, plumbing brought up to code. tile splash around tub, non-load bearing wall s hortened, new lighting. no structural work.",
      "source": "sf-building-permits"
    },
    {
      "number": "200602164820",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2006-02-16",
      "status_date": "2006-08-09",
      "estimated_cost": 15000,
      "revised_cost": 15000,
      "description": "interior changes,no exterior changes.demo 2 non-load bearing partitions,install new kitchen cabinets,counter & appliances.new lighting in kitchen & hallway.",
      "source": "sf-building-permits"
    },
    {
      "number": "9510370",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "1995-07-07",
      "status_date": "1995-07-28",
      "estimated_cost": 7000,
      "description": "reroofing",
      "source": "sf-building-permits"
    },
    {
      "number": "9008974",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "1990-05-08",
      "status_date": "1990-07-05",
      "estimated_cost": 58000,
      "description": "remove chimneys. seal off fireplaces. repair plaster damage.",
      "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=23RD&street_type=ST&address_number=3507",
      "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=3646028&$order=closed_roll_year%20DESC&$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=3646&lot=028",
      "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=3646028",
      "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(-122.42176472429792%2037.75344056149945)%27)",
      "retrieved": "2026-07-31"
    }
  ]
}