{
  "address": "3659–3677 20th Street, San Francisco, CA 94110",
  "path": "/san-francisco/mission/20th-street/3659/",
  "apn": "3608060",
  "block": "3608",
  "lot": "060",
  "eas_baseid": "362344",
  "coordinates": {
    "lat": 37.758169,
    "lng": -122.422719
  },
  "address_range": "3659–3677",
  "street_numbers_on_parcel": [
    "3659",
    "3661",
    "3663",
    "3665",
    "3667",
    "3669",
    "3671",
    "3673",
    "3675",
    "3677"
  ],
  "parcel": {
    "year_built": 1906,
    "units": 20,
    "stories": 2,
    "rooms": 55,
    "bathrooms": 20,
    "lot_area_sqft": 11499,
    "building_area_sqft": 12814,
    "use": "Multi-Family Residential",
    "property_class": "Apartment 15 Units or more",
    "construction_type_code": "D",
    "zoning": "RH-3",
    "supervisor_district": 9,
    "assessor_neighborhood": "Eureka Valley/Dolores Heights",
    "analysis_neighborhood": "Mission",
    "property_location_raw": "3677 3659 20TH                ST0000"
  },
  "assessment": {
    "roll_year": 2025,
    "assessed_land_value": 4437000,
    "assessed_improvement_value": 2958000,
    "last_sale_date": "2012-10-31"
  },
  "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": "1906",
    "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": "202505287358",
      "type": "otc alterations permit",
      "status": "issued",
      "filed": "2025-05-28",
      "status_date": "2025-05-29",
      "estimated_cost": 1,
      "revised_cost": 1,
      "description": "revision to pa# 202504154397: change of as-built drawings. device countin new f/a system has changed.",
      "source": "sf-building-permits"
    },
    {
      "number": "202504154397",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2025-04-15",
      "status_date": "2025-06-04",
      "estimated_cost": 40000,
      "revised_cost": 104000,
      "description": "replacement fof the fa system to the sf/ca code interpretation 1103.6.71 and wire in the lf horn inside of the units plus wireless monitoring.",
      "source": "sf-building-permits"
    },
    {
      "number": "202405293222",
      "type": "additions alterations or repairs",
      "status": "complete",
      "filed": "2024-07-03",
      "status_date": "2024-12-18",
      "estimated_cost": 45000,
      "revised_cost": 45000,
      "description": "to comply with nov 202040071, tier-iii mandatory soft story retrofit.",
      "source": "sf-building-permits"
    },
    {
      "number": "202404170137",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2024-04-17",
      "status_date": "2025-01-17",
      "estimated_cost": 36973,
      "revised_cost": 36973,
      "description": "reroofing",
      "source": "sf-building-permits"
    },
    {
      "number": "202202158046",
      "type": "otc alterations permit",
      "status": "issued",
      "filed": "2022-02-15",
      "status_date": "2022-02-17",
      "estimated_cost": 10000,
      "revised_cost": 10000,
      "description": "remove damaged plaster in entry ceiling, bedroom ceiling, and one living room wall. no elec. or plumbing or mechanical will be demoed. no studs will be demoed.drywall will be put back in it's place. if 5/8\" type x is removed. it will be replaced with 5/8\" type x.",
      "source": "sf-building-permits"
    },
    {
      "number": "202112134300",
      "type": "additions alterations or repairs",
      "status": "filed",
      "filed": "2021-12-13",
      "status_date": "2021-12-13",
      "estimated_cost": 200000,
      "revised_cost": 230345,
      "description": "add 3 adu's per ordinance 162-16 at existing first floor parking.",
      "source": "sf-building-permits"
    },
    {
      "number": "M1157527",
      "type": "otc alterations permit",
      "status": "issued",
      "filed": "2019-10-23",
      "status_date": "2019-10-23",
      "revised_cost": 1,
      "description": "street space",
      "source": "sf-building-permits"
    },
    {
      "number": "201908169060",
      "type": "otc alterations permit",
      "status": "issued",
      "filed": "2019-08-16",
      "status_date": "2019-09-04",
      "estimated_cost": 1,
      "revised_cost": 1,
      "description": "rev to pa# 201505126043; seismic retrofit using iebc a4",
      "source": "sf-building-permits"
    },
    {
      "number": "201908169092",
      "type": "otc alterations permit",
      "status": "issued",
      "filed": "2019-08-16",
      "status_date": "2019-08-23",
      "estimated_cost": 32000,
      "revised_cost": 32000,
      "description": "convert (e) living room to bedroom. relocate kitchen. rehabilitate (e) bathroom. one unit 3rd floor.",
      "source": "sf-building-permits"
    },
    {
      "number": "201712136420",
      "type": "otc alterations permit",
      "status": "issued",
      "filed": "2017-12-13",
      "status_date": "2017-12-13",
      "estimated_cost": 2000,
      "revised_cost": 2000,
      "description": "installing bathroom fan with rough electric and exhaust. #a",
      "source": "sf-building-permits"
    },
    {
      "number": "M854967",
      "type": "otc alterations permit",
      "status": "issued",
      "filed": "2017-11-13",
      "status_date": "2017-11-13",
      "revised_cost": 1,
      "description": "street space permit",
      "source": "sf-building-permits"
    },
    {
      "number": "201707172013",
      "type": "otc alterations permit",
      "status": "cancelled",
      "filed": "2017-07-17",
      "status_date": "2026-01-09",
      "estimated_cost": 1,
      "revised_cost": 2000,
      "description": "exploratory work to the exterior per 2016.007202coa",
      "source": "sf-building-permits"
    },
    {
      "number": "201703010384",
      "type": "otc alterations permit",
      "status": "issued",
      "filed": "2017-03-01",
      "status_date": "2017-03-09",
      "estimated_cost": 40000,
      "revised_cost": 40000,
      "description": "one unit, 3rd floor - rehabilitate existing kitchen, relocate bathroom, install washer & dryer, no exterior changes.",
      "source": "sf-building-permits"
    },
    {
      "number": "201702078808",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2017-02-07",
      "status_date": "2017-05-22",
      "estimated_cost": 40000,
      "revised_cost": 40000,
      "description": "one unit: rehab (e) bathrrom and kitchen. add w/d",
      "source": "sf-building-permits"
    },
    {
      "number": "201602119391",
      "type": "additions alterations or repairs",
      "status": "withdrawn",
      "filed": "2016-02-11",
      "status_date": "2021-10-05",
      "estimated_cost": 500000,
      "description": "remodel ground floor. convert ground floor garage to (5) studio units that include a kitchen & bathroom in each unit per ord. #30-15.",
      "source": "sf-building-permits"
    },
    {
      "number": "201505186565",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2015-05-18",
      "status_date": "2015-09-29",
      "estimated_cost": 35000,
      "revised_cost": 54200,
      "description": "2nd floor/one unit: remodel unit - relocate kitchen, relocaate bathroom, add a laundry room and add a dishwasher in kitchen.",
      "source": "sf-building-permits"
    },
    {
      "number": "201505126043",
      "type": "additions alterations or repairs",
      "status": "issued",
      "filed": "2015-05-12",
      "status_date": "2019-07-30",
      "estimated_cost": 80000,
      "revised_cost": 80000,
      "description": "soft story retrofit per sfbc chapter 34b. engineering criteria 2012 iebc appendix a4.",
      "source": "sf-building-permits"
    },
    {
      "number": "201412012756",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2014-12-01",
      "status_date": "2015-05-07",
      "estimated_cost": 500,
      "revised_cost": 500,
      "description": "install handrail per complaint #201450021 at secondary stairs in rear. also comply w his nov#201404651 dated 2/18/2014.",
      "source": "sf-building-permits"
    },
    {
      "number": "201409166499",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2014-09-16",
      "status_date": "2014-10-14",
      "estimated_cost": 1,
      "revised_cost": 1,
      "description": "revision previous permit no 201311071428, cancel all the structural details, no new roof deck is needed.",
      "source": "sf-building-permits"
    },
    {
      "number": "201403271807",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2014-03-27",
      "status_date": "2014-08-21",
      "estimated_cost": 7500,
      "revised_cost": 8000,
      "description": "add plywood to south rear wall at 1st level, for voluntary seismic strengthening.",
      "source": "sf-building-permits"
    },
    {
      "number": "201401156382",
      "type": "otc alterations permit",
      "status": "issued",
      "filed": "2014-01-15",
      "status_date": "2014-02-25",
      "estimated_cost": 30000,
      "revised_cost": 61900,
      "description": "#3663a- remodel #3663a, add laundry outlet, remove non-bearing partition walls, relocate of kitchen fixture and cabinets, remodel bathroom, new shower, toilet and vanity and newly created bedroom - field veirfy access from n bdrm to public way",
      "source": "sf-building-permits"
    },
    {
      "number": "201401156384",
      "type": "otc alterations permit",
      "status": "issued",
      "filed": "2014-01-15",
      "status_date": "2014-02-25",
      "estimated_cost": 30000,
      "revised_cost": 61900,
      "description": "#3665a- remodel #3665a, add new closets, new laundry outlet, remove non-bearing partition walls, relocate of kitchen fixture and cabinets, remodel bathroom, new shower, toilet and vanity and new bedroom",
      "source": "sf-building-permits"
    },
    {
      "number": "201312043304",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2013-12-04",
      "status_date": "2014-11-25",
      "estimated_cost": 1,
      "revised_cost": 1,
      "description": "ref 201308305666 adjust detail 4/s4 structural plans to show additional floor joists supporting removal of bearing wall. two units.",
      "source": "sf-building-permits"
    },
    {
      "number": "201311081509",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2013-11-08",
      "status_date": "2014-10-10",
      "estimated_cost": 20000,
      "revised_cost": 42000,
      "description": "one unit-new closets & laundry outlet, relocate kitchen, remodel bathroom. upgrade plumbing, electrical fixtures & wires",
      "source": "sf-building-permits"
    },
    {
      "number": "201311081512",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2013-11-08",
      "status_date": "2014-10-10",
      "estimated_cost": 20000,
      "revised_cost": 25000,
      "description": "one unit-new closets & laundry outlet. remove non structural walls. relocate kitchen, remodel bathroom. re-route plumbing & electrical lines as required.",
      "source": "sf-building-permits"
    },
    {
      "number": "201311071428",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2013-11-07",
      "status_date": "2014-10-14",
      "estimated_cost": 20000,
      "revised_cost": 74000,
      "description": "new split bathroom, new bedroom, relocate kitchen, new closet, new laundry outlet 2nd floor. new bedroom, relocate (e) bathroom, new gas heater @ 3rd (upper) floor.",
      "source": "sf-building-permits"
    },
    {
      "number": "201309136771",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2013-09-13",
      "status_date": "2014-08-22",
      "estimated_cost": 25000,
      "revised_cost": 30000,
      "description": "remodel one unit: add new closets, add laundry outlets, remove non bearing walls, relocate kitchen fixtures and cabinets, remodel bathroom, new tile, toilet and vanity. upgrade electrical & plumbing fixtures, reroute elec wires and plumbing as needed. add new gas heater in bedroom.",
      "source": "sf-building-permits"
    },
    {
      "number": "201308305666",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2013-08-30",
      "status_date": "2014-08-22",
      "estimated_cost": 50000,
      "revised_cost": 60000,
      "description": "remodel two units: add new closets, add laundry outlets, remove non bearing walls, relocate kitchen fixtures and cabinets, remodel bathroom, new tile, toilet and vanity. upgrade electrical & plumbing fixtures, reroute elec wires and plumbing as needed.",
      "source": "sf-building-permits"
    },
    {
      "number": "201301047277",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2013-01-04",
      "status_date": "2013-04-19",
      "estimated_cost": 54000,
      "revised_cost": 54000,
      "description": "termite report #2011 repair dry rot at rear stair & decks less than 50%; repair frame base with cap over concrete 12\" max #4 rear in 12\", bolts at 4' at several areas indicated on termite report #12011",
      "source": "sf-building-permits"
    },
    {
      "number": "9804134",
      "type": "otc alterations permit",
      "status": "expired",
      "filed": "1998-03-11",
      "status_date": "1999-03-03",
      "estimated_cost": 6210,
      "description": "reroofing",
      "source": "sf-building-permits"
    },
    {
      "number": "9414371",
      "type": "otc alterations permit",
      "status": "expired",
      "filed": "1994-09-07",
      "status_date": "1995-05-11",
      "estimated_cost": 2300,
      "description": "repair existing backyard wood steps.",
      "source": "sf-building-permits"
    },
    {
      "number": "9122106",
      "type": "otc alterations permit",
      "status": "expired",
      "filed": "1991-11-21",
      "status_date": "1992-03-21",
      "estimated_cost": 3650,
      "description": "install 6 aluminum window",
      "source": "sf-building-permits"
    },
    {
      "number": "9117337",
      "type": "otc alterations permit",
      "status": "expired",
      "filed": "1991-09-19",
      "status_date": "1992-02-19",
      "estimated_cost": 3650,
      "description": "aluminum windows",
      "source": "sf-building-permits"
    },
    {
      "number": "9110181",
      "type": "otc alterations permit",
      "status": "expired",
      "filed": "1991-06-11",
      "status_date": "1992-02-19",
      "estimated_cost": 3865,
      "description": "install nine windows",
      "source": "sf-building-permits"
    },
    {
      "number": "9026089",
      "type": "otc alterations permit",
      "status": "expired",
      "filed": "1990-12-27",
      "status_date": "1992-02-19",
      "estimated_cost": 3865,
      "description": "install aluminum windows",
      "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=3659",
      "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=3608060&$order=closed_roll_year%20DESC&$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=3608&lot=060",
      "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=3608060",
      "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(-122.4227187922418%2037.75816853946463)%27)",
      "retrieved": "2026-07-31"
    }
  ]
}