{
  "address": "3751–3753 20th Street, San Francisco, CA 94110",
  "path": "/san-francisco/mission/20th-street/3751/",
  "apn": "3607066",
  "block": "3607",
  "lot": "066",
  "eas_baseid": "449781",
  "coordinates": {
    "lat": 37.758053,
    "lng": -122.424614
  },
  "address_range": "3751–3753",
  "street_numbers_on_parcel": [
    "3751",
    "3753"
  ],
  "parcel": {
    "year_built": 1900,
    "units": 1,
    "stories": 2,
    "rooms": 9,
    "bathrooms": 1,
    "lot_area_sqft": 2848,
    "building_area_sqft": 1820,
    "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": "Mission",
    "property_location_raw": "0000 3753 20TH                ST0000"
  },
  "assessment": {
    "roll_year": 2025,
    "assessed_land_value": 1392124,
    "assessed_improvement_value": 2636621,
    "last_sale_date": "2013-05-02"
  },
  "historic_status": {
    "ceqa_status_code": "A",
    "ceqa_status_code_article_10_11": "A*",
    "ceqa_status_label": "Historic resource",
    "reason": "Article 10 Historic District, California Register Historic District",
    "yearbuilt": "1900",
    "in_article_10_11_historic_district": true,
    "source": "sf-planning"
  },
  "historic_district": {
    "name": "Liberty Hill Historic District",
    "california_register_status": "Eligible (not listed)",
    "national_register_status": "Not listed",
    "article_10_11_status": "Article 10 historic district",
    "local_landmark_protection": true,
    "period_of_significance": "1860s–1906",
    "source": "sf-historic-districts"
  },
  "permits": [
    {
      "number": "202512232465",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2025-12-23",
      "status_date": "2026-01-06",
      "estimated_cost": 1,
      "revised_cost": 1,
      "description": "to obtain final inspection for work approved under pa 201808177643,202101253251,202105250999. all work is complete.",
      "source": "sf-building-permits"
    },
    {
      "number": "202512232473",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2025-12-23",
      "status_date": "2026-01-06",
      "estimated_cost": 1,
      "revised_cost": 1,
      "description": "to obtain final inspection for work approved under pa# 201506038013. all work is complete.",
      "source": "sf-building-permits"
    },
    {
      "number": "202505237165",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2025-05-23",
      "status_date": "2026-01-06",
      "estimated_cost": 20000,
      "revised_cost": 20000,
      "description": "restore brick finish @ retaining wall, replace tile @ extension with stucco, restore front door transom all per planning nov pa#2023-004187-prj revision to pa#2015-0603-8013 s1-r1",
      "source": "sf-building-permits"
    },
    {
      "number": "202304276594",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2023-04-27",
      "status_date": "2023-11-21",
      "estimated_cost": 4000,
      "revised_cost": 4613,
      "description": "installation of new sprinkler monitoring system, ref pa# 202108126308.",
      "source": "sf-building-permits"
    },
    {
      "number": "202108126308",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2021-08-12",
      "status_date": "2023-11-03",
      "estimated_cost": 21000,
      "revised_cost": 53216,
      "description": "install fire sprinkler system (78 heads) in all floors per nfpa-13, includes underground. ref app#201506038013 s1 r-1",
      "source": "sf-building-permits"
    },
    {
      "number": "202105250999",
      "type": "otc alterations permit",
      "status": "expired",
      "filed": "2021-05-25",
      "status_date": "2026-01-06",
      "estimated_cost": 2000,
      "revised_cost": 2000,
      "description": "revision to bpa#201506038013. replace (e) aluminum window w/ (n) wood window to match (e) rough opening dimentions. window is visible from street. top floor window",
      "source": "sf-building-permits"
    },
    {
      "number": "202101253251",
      "type": "otc alterations permit",
      "status": "expired",
      "filed": "2021-01-25",
      "status_date": "2026-01-06",
      "estimated_cost": 15000,
      "revised_cost": 15000,
      "description": "replaced damaged siding",
      "source": "sf-building-permits"
    },
    {
      "number": "M1146127",
      "type": "otc alterations permit",
      "status": "issued",
      "filed": "2019-10-01",
      "status_date": "2019-10-01",
      "revised_cost": 1,
      "description": "street space only",
      "source": "sf-building-permits"
    },
    {
      "number": "M1049627",
      "type": "otc alterations permit",
      "status": "issued",
      "filed": "2019-03-11",
      "status_date": "2019-03-11",
      "revised_cost": 1,
      "description": "street space only",
      "source": "sf-building-permits"
    },
    {
      "number": "201808177643",
      "type": "otc alterations permit",
      "status": "expired",
      "filed": "2018-08-17",
      "status_date": "2026-01-06",
      "estimated_cost": 80000,
      "revised_cost": 180000,
      "description": "provide temp shoring to facilitate excavation and construction of the proposed basement addition ref 201506038013",
      "source": "sf-building-permits"
    },
    {
      "number": "201506038013",
      "type": "additions alterations or repairs",
      "status": "expired",
      "filed": "2015-06-03",
      "status_date": "2026-01-06",
      "estimated_cost": 1500000,
      "revised_cost": 1500000,
      "description": "new 3-story horizontal addition at rear. new living level below (e) structure. new below-grade garage at street level. new retaining walls at rear yard. replace existing gable window(alum) w/ new wood window. repair/replace existing wood window sashes where indicated.new living room,bedrooms,bath.",
      "source": "sf-building-permits"
    },
    {
      "number": "200802265643",
      "type": "otc alterations permit",
      "status": "filed",
      "filed": "2008-02-26",
      "status_date": "2008-02-26",
      "description": "comply nov 200684102: e deck stair to be removed from 2nd to 3rd story. n stairs to be relocated as shown in plans. new deck support unter stair. fill in railing at n work only",
      "source": "sf-building-permits"
    },
    {
      "number": "200802195107",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2008-02-19",
      "status_date": "2008-09-11",
      "estimated_cost": 6000,
      "revised_cost": 6000,
      "description": "comply with nov# 200684102-(e) deck stair to be removed from 2nd to 3rd story. new stairs to be relocated as shown in plans, new deck support under stair, fill in railing at new work only",
      "source": "sf-building-permits"
    },
    {
      "number": "200702234778",
      "type": "otc alterations permit",
      "status": "expired",
      "filed": "2007-02-23",
      "status_date": "2013-04-23",
      "estimated_cost": 1000,
      "revised_cost": 1000,
      "description": "replace approx 10' stair stringers x 2 and stair treds. less than 50% of total per nov #200684012 in kind.",
      "source": "sf-building-permits"
    },
    {
      "number": "9812691",
      "type": "otc alterations permit",
      "status": "expired",
      "filed": "1998-07-06",
      "status_date": "1998-11-06",
      "estimated_cost": 750,
      "description": "construct 8' long retaining wall less than 4' high",
      "source": "sf-building-permits"
    },
    {
      "number": "8903758",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "1989-03-09",
      "status_date": "1989-06-13",
      "estimated_cost": 4000,
      "description": "reroofing",
      "source": "sf-building-permits"
    },
    {
      "number": "8611972",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "1986-09-26",
      "status_date": "1986-11-06",
      "estimated_cost": 500,
      "description": "repair deck.",
      "source": "sf-building-permits"
    },
    {
      "number": "8514583",
      "type": "additions alterations or repairs",
      "status": "complete",
      "filed": "1985-12-27",
      "status_date": "1986-11-26",
      "estimated_cost": 300,
      "description": "legalize 2 units",
      "source": "sf-building-permits"
    },
    {
      "number": "8410829",
      "type": "additions alterations or repairs",
      "status": "complete",
      "filed": "1984-10-09",
      "status_date": "1986-11-26",
      "estimated_cost": 5200,
      "description": "remove portion of brick, install sill, remove landing, stair",
      "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=3751",
      "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=3607066&$order=closed_roll_year%20DESC&$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=3607&lot=066",
      "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=3607066",
      "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(-122.4246136816846%2037.75805263379875)%27)",
      "retrieved": "2026-07-31"
    }
  ]
}