{
  "generated_with": "analysis/cheaper_twins.py",
  "params": {
    "min_props": 150,
    "min_recorded": 40,
    "max_km": 3.0,
    "min_gap": 0.15,
    "max_gap": 0.45,
    "build_band": 30,
    "school_tol": 1.5,
    "station_max": 1.5,
    "station_tol": 0.9,
    "crime_ratio": 1.5,
    "owner_tol": 22,
    "degree_tol": 22,
    "age_tol": 12,
    "floor_ratio": 0.72,
    "min_abs_gap": 20000
  },
  "n_sectors": 7560,
  "n_twin_pairs": 415,
  "attribution": "Contains HM Land Registry data \u00a9 Crown copyright and database right. Licensed under the Open Government Licence v3.0.",
  "best_value_sector": {
    "sector": "BD21 3",
    "est_psqm": 660,
    "sqm_per_100k": 151.6,
    "n": 1377
  },
  "dearest_sector": {
    "sector": "W1K 2",
    "est_psqm": 34362,
    "sqm_per_100k": 2.9,
    "n": 591
  },
  "biggest_twin_gap": {
    "pricey_sector": "W1U 3",
    "twin_sector": "EC1N 7",
    "pricey_psqm": 16948,
    "twin_psqm": 9362,
    "gap_pct": 44.8,
    "gap_per_sqm": 7586,
    "gap_on_avg_home": 504469,
    "gap_on_90sqm": 682740,
    "dist_km": 2.89,
    "dominant_type": "Flats/Maisonettes",
    "build_year": 1940,
    "good_secondary": 1.3,
    "station_km": 0.41,
    "pricey_lat": 51.51712,
    "pricey_lon": -0.15271,
    "twin_lat": 51.52057,
    "twin_lon": -0.11049,
    "pricey_n": 302,
    "twin_n": 747
  },
  "top_twins": [
    {
      "pricey_sector": "W1U 3",
      "twin_sector": "EC1N 7",
      "pricey_psqm": 16948,
      "twin_psqm": 9362,
      "gap_pct": 44.8,
      "gap_per_sqm": 7586,
      "gap_on_avg_home": 504469,
      "gap_on_90sqm": 682740,
      "dist_km": 2.89,
      "dominant_type": "Flats/Maisonettes",
      "build_year": 1940,
      "good_secondary": 1.3,
      "station_km": 0.41,
      "pricey_lat": 51.51712,
      "pricey_lon": -0.15271,
      "twin_lat": 51.52057,
      "twin_lon": -0.11049,
      "pricey_n": 302,
      "twin_n": 747
    },
    {
      "pricey_sector": "WC2R 1",
      "twin_sector": "SW1V 1",
      "pricey_psqm": 19997,
      "twin_psqm": 11119,
      "gap_pct": 44.4,
      "gap_per_sqm": 8878,
      "gap_on_avg_home": 665850,
      "gap_on_90sqm": 799020,
      "dist_km": 2.82,
      "dominant_type": "Flats/Maisonettes",
      "build_year": 2017,
      "good_secondary": 2.0,
      "station_km": 0.21,
      "pricey_lat": 51.51228,
      "pricey_lon": -0.11525,
      "twin_lat": 51.49297,
      "twin_lon": -0.14234,
      "pricey_n": 316,
      "twin_n": 1408
    },
    {
      "pricey_sector": "L8 7",
      "twin_sector": "L7 0",
      "pricey_psqm": 2757,
      "twin_psqm": 1541,
      "gap_pct": 44.1,
      "gap_per_sqm": 1216,
      "gap_on_avg_home": 78432,
      "gap_on_90sqm": 109440,
      "dist_km": 2.36,
      "dominant_type": "Flats/Maisonettes",
      "build_year": 1914,
      "good_secondary": 2.3,
      "station_km": 1.04,
      "pricey_lat": 53.39791,
      "pricey_lon": -2.96459,
      "twin_lat": 53.41174,
      "twin_lon": -2.93813,
      "pricey_n": 2054,
      "twin_n": 2208
    },
    {
      "pricey_sector": "L3 2",
      "twin_sector": "L5 5",
      "pricey_psqm": 1642,
      "twin_psqm": 920,
      "gap_pct": 44.0,
      "gap_per_sqm": 722,
      "gap_on_avg_home": 47291,
      "gap_on_90sqm": 64980,
      "dist_km": 1.61,
      "dominant_type": "Flats/Maisonettes",
      "build_year": 2004,
      "good_secondary": 1.5,
      "station_km": 0.47,
      "pricey_lat": 53.41155,
      "pricey_lon": -2.98583,
      "twin_lat": 53.42544,
      "twin_lon": -2.97852,
      "pricey_n": 1341,
      "twin_n": 706
    },
    {
      "pricey_sector": "S2 4",
      "twin_sector": "S3 9",
      "pricey_psqm": 2468,
      "twin_psqm": 1402,
      "gap_pct": 43.2,
      "gap_per_sqm": 1066,
      "gap_on_avg_home": 73554,
      "gap_on_90sqm": 95940,
      "dist_km": 2.82,
      "dominant_type": "Flats/Maisonettes",
      "build_year": 1986,
      "good_secondary": 2.6,
      "station_km": 0.72,
      "pricey_lat": 53.36993,
      "pricey_lon": -1.46978,
      "twin_lat": 53.39521,
      "twin_lon": -1.46478,
      "pricey_n": 2423,
      "twin_n": 1778
    },
    {
      "pricey_sector": "W1U 4",
      "twin_sector": "NW1 4",
      "pricey_psqm": 24238,
      "twin_psqm": 13766,
      "gap_pct": 43.2,
      "gap_per_sqm": 10472,
      "gap_on_avg_home": 759220,
      "gap_on_90sqm": 942480,
      "dist_km": 0.97,
      "dominant_type": "Flats/Maisonettes",
      "build_year": 1940,
      "good_secondary": 1.0,
      "station_km": 0.44,
      "pricey_lat": 51.51958,
      "pricey_lon": -0.15295,
      "twin_lat": 51.52803,
      "twin_lon": -0.14886,
      "pricey_n": 984,
      "twin_n": 1340
    },
    {
      "pricey_sector": "WC2A 2",
      "twin_sector": "EC2A 2",
      "pricey_psqm": 25482,
      "twin_psqm": 14576,
      "gap_pct": 42.8,
      "gap_per_sqm": 10906,
      "gap_on_avg_home": 834309,
      "gap_on_90sqm": 981540,
      "dist_km": 2.3,
      "dominant_type": "Flats/Maisonettes",
      "build_year": 2019,
      "good_secondary": 2.0,
      "station_km": 0.42,
      "pricey_lat": 51.51496,
      "pricey_lon": -0.11456,
      "twin_lat": 51.52119,
      "twin_lon": -0.08217,
      "pricey_n": 254,
      "twin_n": 772
    },
    {
      "pricey_sector": "M40 5",
      "twin_sector": "M9 4",
      "pricey_psqm": 2812,
      "twin_psqm": 1626,
      "gap_pct": 42.2,
      "gap_per_sqm": 1186,
      "gap_on_avg_home": 91915,
      "gap_on_90sqm": 106740,
      "dist_km": 1.18,
      "dominant_type": "Terraced",
      "build_year": 1958,
      "good_secondary": 2.6,
      "station_km": 0.72,
      "pricey_lat": 53.51372,
      "pricey_lon": -2.18713,
      "twin_lat": 53.51214,
      "twin_lon": -2.20436,
      "pricey_n": 1632,
      "twin_n": 3530
    },
    {
      "pricey_sector": "W11 2",
      "twin_sector": "NW1 6",
      "pricey_psqm": 19262,
      "twin_psqm": 11154,
      "gap_pct": 42.1,
      "gap_per_sqm": 8108,
      "gap_on_avg_home": 482426,
      "gap_on_90sqm": 729720,
      "dist_km": 2.94,
      "dominant_type": "Flats/Maisonettes",
      "build_year": 1890,
      "good_secondary": 4.0,
      "station_km": 0.53,
      "pricey_lat": 51.51407,
      "pricey_lon": -0.20373,
      "twin_lat": 51.5237,
      "twin_lon": -0.16342,
      "pricey_n": 4082,
      "twin_n": 3312
    },
    {
      "pricey_sector": "N10 3",
      "twin_sector": "N12 0",
      "pricey_psqm": 9590,
      "twin_psqm": 5554,
      "gap_pct": 42.1,
      "gap_per_sqm": 4036,
      "gap_on_avg_home": 296646,
      "gap_on_90sqm": 363240,
      "dist_km": 2.97,
      "dominant_type": "Flats/Maisonettes",
      "build_year": 1914,
      "good_secondary": 3.9,
      "station_km": 1.16,
      "pricey_lat": 51.58839,
      "pricey_lon": -0.14404,
      "twin_lat": 51.60872,
      "twin_lon": -0.17254,
      "pricey_n": 3984,
      "twin_n": 3282
    }
  ]
}