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analysis/out/findings/cheaper-twin__w1u-4-vs-nw1-4.json

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+{
+  "slug": "cheaper-twin/w1u-4-vs-nw1-4",
+  "type": "cheaper_twin",
+  "page_path": "/cheaper-twin/w1u-4-vs-nw1-4",
+  "title": "Marylebone vs Camden: the same flat, about 43% cheaper per m\u00b2",
+  "hook": "\u00a3942,480 less for an equivalent flat: same station, similar schools, ~0.97km apart",
+  "shocking_number": "43%",
+  "pricey": {
+    "sector": "W1U 4",
+    "name": "Marylebone",
+    "label": "Marylebone (W1U 4)",
+    "named": true,
+    "est_psqm": 24238,
+    "n": 984
+  },
+  "twin": {
+    "sector": "NW1 4",
+    "name": "Camden",
+    "label": "Camden (NW1 4)",
+    "named": true,
+    "est_psqm": 13766,
+    "n": 1340
+  },
+  "stats": {
+    "gap_pct": 43.2,
+    "gap_per_sqm": 10472,
+    "gap_on_90sqm": 942480,
+    "gap_on_avg_home": 759220,
+    "dominant_type": "Flats/Maisonettes",
+    "build_year": 1940,
+    "good_secondary_catchments": 1.0,
+    "station_km": 0.44,
+    "distance_km": 0.97
+  },
+  "map_query": "lat=51.5238&lon=-0.15091&zoom=12.5&filter=Est.%20price%20per%20sqm:0:14500&filter=Good%2B%20secondary%20school%20catchments:1:11",
+  "map_url": "https://perfect-postcode.co.uk/?lat=51.5238&lon=-0.15091&zoom=12.5&filter=Est.%20price%20per%20sqm:0:14500&filter=Good%2B%20secondary%20school%20catchments:1:11",
+  "og_image": "https://perfect-postcode.co.uk/api/screenshot?og=1&lat=51.5238&lon=-0.15091&zoom=12.5&filter=Est.%20price%20per%20sqm:0:14500&filter=Good%2B%20secondary%20school%20catchments:1:11",
+  "methodology": "Postcode sectors (e.g. N10 3) compared on estimated \u00a3/m\u00b2 of floor space. A pair is only called a 'twin' when the two sectors share the dominant property type, build era (\u00b130y), good-school catchment provision, station access, deprivation/tenure, education, age and home size, so the price gap reflects a name premium, not a different kind of area. Estimates, not valuations; aggregated to sector, never address-level.",
+  "needs_name_check": false,
+  "attribution": "Contains HM Land Registry data \u00a9 Crown copyright and database right. Licensed under the Open Government Licence v3.0.",
+  "sources": "HM Land Registry \u00b7 EPC (DLUHC) \u00b7 Ofsted \u00b7 DfT \u00b7 ONS \u00b7 Police.uk"
+}