Source: floor-plan geometry census, v7 two-rater construct census (2026-06-21) — 745 plans / 12,849 spaces / 7,287 dimensioned. Showing the 24 room categories with ≥10 printed dimensions (7,248 samples, 99.5% of all dimensioned spaces). 18 rare or rarely-dimensioned categories are omitted (e.g. linen 380 spaces / 0 dims, stairs 111 / 1, wardrobe 80 / 4, pool 30 / 8, void 23 / 0). Census, not sample; descriptive only; the arbitrary “most common dimension” is retired for the median footprint; width = short side, length = long side. Categories functionally re-derived by full two-rater adjudication (κ: master 0.880, island 0.727); figure updated ahead of the thesis-wide MR-13 cutover.