Estimator & Generative Design
Draw rooms · Full BOM + Labor takeoff · IBC compliance · Middle Tennessee
Draw rooms or enter sqft above
Habitable rooms ≥ 70 sqft; no dimension < 7 ft
Draw rooms to validate
No horizontal dimension of any habitable room < 7 ft
Draw rooms to validate
Habitable spaces ≥ 7 ft; bathrooms/hallways ≥ 6 ft 8 in
Ceiling height modeled at 9 ft — verify with framing plan
Glazing area ≥ 8% of floor area; openable area ≥ 4%
Draw rooms to validate
≥ 5.7 sqft net open area; sill ≤ 44" AFF; min 20" wide × 24" high
Add bedroom rooms to canvas to validate
Max riser 7¾"; min run 10"; min width 36"; handrail 34"–38"
2-story — verify stair geometry in construction documents
½" gypsum board on garage side of shared wall; 20-min fire door
Garage present — fire separation required at shared wall
Ceiling R-49, Wall R-20, Floor R-19, Window U-0.30
Williamson County — IECC 2021 Climate Zone 4A applies
Front 30 ft, side 10 ft, rear 20 ft; lot coverage ≤ 35%
Verify lot dimensions — requires site plan with survey
Machine-verified items marked PASS/FAIL. Items marked REVIEW require professional judgment and stamped construction documents. Compliance engine routes to: Williamson County · Williamson Co. Zoning Ord. · IRC 2021 · IECC 2021 (CZ-4A) · TN State Fire Code
Middle Tennessee market rates · Updated Q1 2026 · WorkHawg baseline open-shop