Source: Aurora 1800 (AUR-1800) — catalog envelope massing, site-feet. · 2 buildings · 3,340 sf footprint · 16 rooms · 23 walls

Design geometry in site-feet — no drawing calibration applies; values are the scheme's own.

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 the DESIGNED roof (gable, 6 ft rise) is declared on the plan record. Heights are declared at 10.5 ft/story.

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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 the DESIGNED roof (gable, 6 ft rise) is declared on the plan record. 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.

Interior finish quantities from the plan's DESIGNED residential room graph (the A-105 finish plan source): per room the floor and ceiling finish area is the room polygon area (a DECLARED flat ceiling equal to the floor — no vaults, soffits, or sloped ceilings modeled), and the wall finish area is the room perimeter × the declared 10.5 ft story height (no deduction for openings; each room counts its own full perimeter, so both faces of a shared partition are finished). The floor-finish CODE is the room's OWN declared decor selection (a default-by-room-type planning convention where none was authored — not a product, SKU, or coordinated selection); a room with no finish is UNSCHEDULED, never invented. Quantities only — no dollar figures, no pricing — a planning-grade finish basis, not a measured construction takeoff.

Designed opening rough-opening AREAS from the plan's DESIGNED facade openings, grouped by anonymous rough-opening size-class (width × height in feet): per size-class the count and its total rough-opening area (count × width × height). windows/doors are the GROUND story; byStory lists each addressed story's own openings and windowsBuildingTotal / doorsBuildingTotal sum them across the building (upper stories carry their OWN designed openings, so this is NOT the ground story × storyCount). The rough opening is the framed wall opening, not the glazed/leaf area. Quantities only — no monetary figures — a planning-grade quantity basis, not a measured construction takeoff.

Composed-roof sheathing + flashing/trim line quantities from the plan's DESIGNED roof composed over the FULL built massing (every roof-bearing mass — the main mass AND an attached garage). This REPLACES the K9b main-plane-only roof figure — ONE basis, never double-counted: sheathingAreaSqft sums every roof plane's area × its slope factor, byMass breaks it out per mass (the garage finally counts), bySlopeFactor groups areas by the pitch-like label the planes actually carry (the composition does not expose pitchRisePer12), and squares = area ÷ 100 (one roofing square = 100 sq ft). Line quantities sum the engine's own plan-space segment lengths — ridge and eave lengths are horizontal (plan length equals true length); valley, hip, and RAKE lengths are PLAN-PROJECTED (the true sloped run is longer), disclosed rather than silently understated. Quantities only — no monetary figures — a planning-grade quantity basis derived from the composed roof geometry, not a measured construction takeoff.

Planning-grade facade cladding areas from the rendered primary mass's vertical shell faces, grouped by the same north/south/east/west model-coordinate facing axes used by elevation export. These are elevation facings, not semantic front/right/rear/left labels or geographic bearings without a geo-anchor. Modeled net cladding area subtracts only rendered DESIGNED facade window/door rectangles. Attached garages and wings, gable triangles, foundation skirts, roof/parapet surfaces, trim, material system selection, and waste are excluded. Quantities only — not a measured construction takeoff. wall height assumed 2 stories × 10.5 ft; plan height fields absent.

Gutter linear feet is derived ONLY from the composed roof's drip-edge EAVE runs (the engine's own plan-space eave segments; eaves are horizontal so plan length equals true length). Rake, shed high-wall, and parapet edges never receive gutters and are never counted. Dormer drip edges shed onto the host roof below rather than into a gutter run and are EXCLUDED (identified by the engine's own dormer_wall junctions). Downspout count applies the declared spacing convention per gutter run. Gutter profile/size, downspout sizing, leaders, and splash blocks are not modeled. Quantities only — no monetary figures — a planning-grade quantity basis, not a measured construction takeoff.