40x40 Duplex House Plan

I need a clear, construction-ready 2-D floor plan for a new home to be built on a 40 ft × 40 ft plot (setbacks can be noted separately). The design must give me three bedrooms in total and follow a true duplex/two-floor layout. On the ground floor I definitely want one bedroom with an attached bathroom; you may arrange the remaining functional spaces—living, kitchen, dining, stairs—where they work best for circulation, natural light, and ventilation, but keep the bedroom requirement fixed.

Deliverables
• Ground- and first-floor 2-D plans with accurate room dimensions and wall thicknesses
• A compact staircase solution plotted on plan
• Door, window, and furniture placements for practical flow
• Final drawings in both PDF and an editable CAD format (DWG or similar) ready for my contractor to use

Please keep structural grids and column positions coherent with the 40 × 40 footprint, and note any assumed wall thicknesses or offsets on the drawings so the engineer can check loads quickly.