{ "slug": "coverage", "computed_from": "masspermits.com build", "corpus_fetched_at": "2026-09-06T07:42:47.738505+00:00", "corpus_rows": 37571, "corpus_sources": 31, "corpus_first": "2026-03-10", "corpus_last": "2026-09-06", "method": { "heat_pump": "heat\\s*pump|mini[\\s-]?split|minisplit|ductless|\\bashp\\b", "fossil": "\\bfurnace(s)?\\b|\\bboiler(s)?\\b|forced hot air|\\bgas heat\\b|oil burner", "adu": "\\baccessory dwelling|\\badu\\b|in[- ]law (apartment|suite)|accessory apartment", "min_desc_chars": 8, "min_heating_rows": 20, "min_gas_distinctness": 0.5, "min_weekday_rows": 100, "min_calendar_fridays": 6 }, "guards": {}, "stats": { "n_sources": 31, "n_rows": 37571, "fetched_at": "2026-09-06T07:42:47.738505+00:00", "no_valuation": 20, "with_coords": 2, "no_freetext": 11, "capped_sources": 14, "row_cap": 900, "monthly": [ "Amherst, MA", "Barnstable, MA", "Chatham, MA", "Lexington, MA", "Plymouth, MA", "Reading, MA", "Sudbury, MA" ], "errors": [], "table": [ { "source": "Worcester, MA", "rows": 6419, "first": "2026-03-10", "last": "2026-08-29", "valued_pct": 0.0, "freetext_pct": 100.0, "coords": false, "capped": false }, { "source": "Boston, MA", "rows": 5620, "first": "2026-07-09", "last": "2026-09-03", "valued_pct": 99.1, "freetext_pct": 100.0, "coords": true, "capped": false }, { "source": "Cambridge, MA", "rows": 2775, "first": "2026-05-11", "last": "2026-09-04", "valued_pct": 70.2, "freetext_pct": 99.7, "coords": true, "capped": false }, { "source": "Plymouth, MA", "rows": 2468, "first": "2026-06-01", "last": "2026-08-31", "valued_pct": 57.2, "freetext_pct": 100.0, "coords": false, "capped": false }, { "source": "Lexington, MA", "rows": 1225, "first": "2026-06-01", "last": "2026-08-31", "valued_pct": 75.0, "freetext_pct": 92.2, "coords": false, "capped": false }, { "source": "Barnstable, MA", "rows": 938, "first": "2026-05-01", "last": "2026-07-31", "valued_pct": 93.6, "freetext_pct": 100.0, "coords": false, "capped": false }, { "source": "Attleboro, MA", "rows": 900, "first": "2026-07-01", "last": "2026-09-05", "valued_pct": 0.0, "freetext_pct": 0.0, "coords": false, "capped": true }, { "source": "Bridgewater, MA", "rows": 900, "first": "2026-05-06", "last": "2026-09-04", "valued_pct": 0.0, "freetext_pct": 0.0, "coords": false, "capped": true }, { "source": "Easton, MA", "rows": 900, "first": "2026-05-13", "last": "2026-09-05", "valued_pct": 0.0, "freetext_pct": 0.0, "coords": false, "capped": true }, { "source": "Fairhaven, MA", "rows": 900, "first": "2026-03-26", "last": "2026-09-04", "valued_pct": 0.0, "freetext_pct": 1.2, "coords": false, "capped": true }, { "source": "Falmouth, MA", "rows": 900, "first": "2026-07-28", "last": "2026-09-04", "valued_pct": 0.0, "freetext_pct": 100.0, "coords": false, "capped": true }, { "source": "Foxborough, MA", "rows": 900, "first": "2026-04-30", "last": "2026-09-04", "valued_pct": 97.8, "freetext_pct": 1.3, "coords": false, "capped": true }, { "source": "Hingham, MA", "rows": 900, "first": "2026-06-04", "last": "2026-09-03", "valued_pct": 0.0, "freetext_pct": 100.0, "coords": false, "capped": true }, { "source": "Mansfield, MA", "rows": 900, "first": "2026-04-17", "last": "2026-09-03", "valued_pct": 0.0, "freetext_pct": 97.4, "coords": false, "capped": true }, { "source": "Mashpee, MA", "rows": 900, "first": "2026-06-17", "last": "2026-09-04", "valued_pct": 0.0, "freetext_pct": 0.0, "coords": false, "capped": true }, { "source": "Milton, MA", "rows": 900, "first": "2026-05-28", "last": "2026-09-04", "valued_pct": 0.0, "freetext_pct": 98.3, "coords": false, "capped": true }, { "source": "Randolph, MA", "rows": 900, "first": "2026-05-13", "last": "2026-09-05", "valued_pct": 0.0, "freetext_pct": 93.8, "coords": false, "capped": true }, { "source": "Sandwich, MA", "rows": 900, "first": "2026-06-01", "last": "2026-09-05", "valued_pct": 0.0, "freetext_pct": 0.8, "coords": false, "capped": true }, { "source": "Stoughton, MA", "rows": 900, "first": "2026-06-08", "last": "2026-09-06", "valued_pct": 0.0, "freetext_pct": 3.3, "coords": false, "capped": true }, { "source": "Taunton, MA", "rows": 900, "first": "2026-06-11", "last": "2026-09-04", "valued_pct": 93.4, "freetext_pct": 99.6, "coords": false, "capped": true }, { "source": "Braintree, MA", "rows": 899, "first": "2026-06-25", "last": "2026-09-05", "valued_pct": 0.0, "freetext_pct": 95.1, "coords": false, "capped": false }, { "source": "Rockland, MA", "rows": 858, "first": "2026-03-10", "last": "2026-09-04", "valued_pct": 0.0, "freetext_pct": 98.7, "coords": false, "capped": false }, { "source": "Norwell, MA", "rows": 746, "first": "2026-03-10", "last": "2026-09-04", "valued_pct": 0.0, "freetext_pct": 0.1, "coords": false, "capped": false }, { "source": "Cohasset, MA", "rows": 743, "first": "2026-03-10", "last": "2026-09-04", "valued_pct": 0.0, "freetext_pct": 0.0, "coords": false, "capped": false }, { "source": "Hanson, MA", "rows": 504, "first": "2026-03-10", "last": "2026-09-04", "valued_pct": 0.0, "freetext_pct": 100.0, "coords": false, "capped": false }, { "source": "West Bridgewater, MA", "rows": 490, "first": "2026-03-10", "last": "2026-09-05", "valued_pct": 0.0, "freetext_pct": 96.7, "coords": false, "capped": false }, { "source": "Sudbury, MA", "rows": 296, "first": "2026-06-01", "last": "2026-08-31", "valued_pct": 99.7, "freetext_pct": 100.0, "coords": false, "capped": false }, { "source": "Chatham, MA", "rows": 277, "first": "2026-06-01", "last": "2026-08-31", "valued_pct": 99.6, "freetext_pct": 100.0, "coords": false, "capped": false }, { "source": "Avon, MA", "rows": 275, "first": "2026-03-10", "last": "2026-09-04", "valued_pct": 0.0, "freetext_pct": 0.0, "coords": false, "capped": false }, { "source": "Reading, MA", "rows": 223, "first": "2026-06-01", "last": "2026-07-30", "valued_pct": 99.6, "freetext_pct": 100.0, "coords": false, "capped": false }, { "source": "Amherst, MA", "rows": 215, "first": "2026-06-01", "last": "2026-07-30", "valued_pct": 87.4, "freetext_pct": 100.0, "coords": false, "capped": false } ] } }