Schematic envelope massing generated from the catalog plan's box dimensions (42 ft × 68 ft × 2 stories, 2-car front-load garage) — envelope massing with a designed interior: the interior is a DESIGNED wall-graph layout (16 rooms on story 1; upper stories keep the massing), and a schematic roof style (gable, 4 ft rise) is derived from the footprint (not a designed roof). Heights are declared at 10.5 ft/story.
Garage is a single-story attached volume sized from the plan's garage class (2 bays, front-load) — schematic massing, not a drawn garage.
Designed fenestration — declared design intent, not field-verified.
Room areas are net of partition thickness; the gross envelope is retained for reconciliation.
Interior layout is a designed wall graph; rooms are its enclosed faces net of partition thickness, not a schematic partition.
Each addressed story derives its rooms and partitions from ITS OWN walls; the shared envelope shell is counted once.
Stair geometry (riser count, riser height, tread depth, run length) DERIVES from the story height and the cited IRC R311.7 code constants — never stored or guessed; a schematic straight-run stair with no railings, stringers, or landings modeled.
The host room's area is reported net of the stair footprint; grossAreaBeforeStairSqft retains the pre-stair area for reconciliation.
Heights are per-building design values from the scheme — not construction dimensions.
Facade openings are a schematic rhythm for massing legibility — not designed fenestration.
Schematic furniture inferred from the room type — not an interior design.
Curb-appeal landscaping is presentation dressing derived from plan openings on schematic ground — not site data or a landscape design.
Floor finishes are a schematic guess from the room name (wood / tile / sealed) — no finish schedule was parsed. Legibility only, never priced.