Rule of thumbRecommended
Place habitable rooms on corners for light on two sides
QS-DAYLIGHT-01Description
Where the program allows, position living rooms + primary bedrooms at the corners of the footprint so they get light from two walls. Corner placement consistently distinguished exemplary plans from solid ones.
Why this exists
Light on two walls dramatically improves daytime usability — it prevents the 'cave with one window' effect even when individual windows are modest. Exemplary plans averaged > 50% of habitables on corners.
Categories
Daylight
Source
Almost an Architectno manifest entry
Floor-plan quality calibration study (v1 (45 plan observations))
Section: lib/quality/calibration/observations.ts
Published 2026-05-16 · last verified 2026-05-16
Solver enforcement
Browsable only — the solver does not currently enforce this directive (no spec-level data to check against). This entry exists so the architect personas can cite it in conversation and the user can read what the rule says.
Related directives
- Living spaces south-facing in cold climates · LIVING-SOUTH-FACING
- Kitchen east-facing for breakfast · KITCHEN-EAST-FACING
- Studio / office north-facing for consistent light · STUDIO-NORTH-FACING
- Window head heights: align at 6'8" or 7'0" within a room · ROT/EXT-WINDOW-HEAD-HEIGHT
- Window sill heights by use: 18" living, 24-36" bedroom, 42" kitchen, 60" bath · ROT/EXT-WINDOW-SILL-HEIGHT
Last reviewed 2026-05-16.