{
  "address": "20–22 Walter Street, San Francisco, CA 94114",
  "path": "/san-francisco/castro/walter-street/20/",
  "apn": "3538060",
  "block": "3538",
  "lot": "060",
  "eas_baseid": "358623",
  "coordinates": {
    "lat": 37.768765,
    "lng": -122.432695
  },
  "address_range": "20–22",
  "street_numbers_on_parcel": [
    "20",
    "22"
  ],
  "parcel": {
    "year_built": 1900,
    "units": 2,
    "stories": 2,
    "rooms": 9,
    "bathrooms": 2,
    "lot_area_sqft": 2522,
    "building_area_sqft": 2162,
    "use": "Multi-Family Residential",
    "property_class": "Flats & Duplex",
    "construction_type_code": "D",
    "zoning": "RH-3",
    "supervisor_district": 8,
    "assessor_neighborhood": "Duboce Triangle",
    "analysis_neighborhood": "Castro/Upper Market",
    "property_location_raw": "0022 0020 WALTER              ST0000"
  },
  "assessment": {
    "roll_year": 2025,
    "assessed_land_value": 45544,
    "assessed_improvement_value": 185278
  },
  "historic_status": {
    "ceqa_status_code": "A",
    "ceqa_status_code_article_10_11": "A",
    "ceqa_status_label": "Historic resource",
    "reason": "California Register Historic District",
    "yearbuilt": "1900",
    "survey_name": "20 Walter St",
    "in_article_10_11_historic_district": false,
    "source": "sf-planning"
  },
  "historic_district": {
    "name": "Duboce Triangle Historic District",
    "california_register_status": "Eligible (not listed)",
    "national_register_status": "Not listed",
    "article_10_11_status": "No local landmark protection",
    "local_landmark_protection": false,
    "period_of_significance": "ca 1870–ca 1920",
    "source": "sf-historic-districts"
  },
  "permits": [
    {
      "number": "202111092057",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2021-11-09",
      "status_date": "2022-10-04",
      "estimated_cost": 5000,
      "revised_cost": 12000,
      "description": "revision to app#202109037743; 1)excavation and nw retaining walls at crawl space at rear of bldg. (approx. 15 cu yd) 2)relocate proposed water heater to crawl space. 3)remove and replace floor framing at 2nd fl. sunroom (approx. 100 sq ft)",
      "source": "sf-building-permits"
    },
    {
      "number": "202109037743",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2021-09-03",
      "status_date": "2022-10-04",
      "estimated_cost": 70000,
      "revised_cost": 98000,
      "description": "at front setback, replace in kind ext. entry stairs. at rear yard, replace in kind ext stairs. at 2/f, remodel kitchen, bath, laundry and sunroom. at 3/f, remodel bath, sunroom. at rear elevation, replace siding and windows. new furnace for lower unit. new heat pump for upper unit.",
      "source": "sf-building-permits"
    },
    {
      "number": "201105176214",
      "type": "otc alterations permit",
      "status": "complete",
      "filed": "2011-05-17",
      "status_date": "2012-05-17",
      "estimated_cost": 5000,
      "revised_cost": 5000,
      "description": "to comply with n.o.v. 201115881. install windows with out permit. window replacement @ front of house: from gliders to single hung w/ slope seal adapters (milgard tuscany series)",
      "source": "sf-building-permits"
    },
    {
      "number": "9113524",
      "type": "additions alterations or repairs",
      "status": "expired",
      "filed": "1991-08-01",
      "status_date": "1992-01-07",
      "estimated_cost": 4500,
      "description": "install new foundation @ rear perimeter porch",
      "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=WALTER&street_type=ST&address_number=20",
      "retrieved": "2026-07-28"
    },
    {
      "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=3538060&$order=closed_roll_year%20DESC&$limit=1",
      "retrieved": "2026-07-28"
    },
    {
      "id": "sf-building-permits",
      "name": "SF Dept. of Building Inspection via DataSF",
      "query": "https://data.sfgov.org/resource/i98e-djp9.json?block=3538&lot=060",
      "retrieved": "2026-07-28"
    },
    {
      "id": "sf-planning",
      "name": "SF Planning Department — Historic Resource Status by Parcel via DataSF",
      "query": "https://data.sfgov.org/resource/3tsw-4idn.json?apn=3538060",
      "retrieved": "2026-07-28"
    },
    {
      "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(-122.43269539185387%2037.76876463096503)%27)",
      "retrieved": "2026-07-28"
    }
  ]
}